mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by Logi on Mon Sep 24, 2012 6:01 pm

HighlyJetted wrote:I bought a new hijet last night and I had it delivered this morning..

affraid
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by waz on Mon Sep 24, 2012 6:02 pm

How many do you have now HJ
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Mon Sep 24, 2012 7:06 pm

Well I'm ill equipped to get the rad off in the road, so gonna have to take it to my x's garage tommorow to remove, get a lift home with the rad to see what I can get out of it with household cleaners in the bath, I hate hate HATE having to ask for help, think if I borrow the pressure testing gizmo I could use that to push some cleaner through, I don't holdout much hope tho
Anyone know how to find out what the book value of a vehicle is? Just out of interest !
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by PFM on Mon Sep 24, 2012 7:36 pm

Just a thought, and anyone shout me down if there's a good reason against it. I've used central heating de-furring stuff (crystalls I think, made by Fernox, will look at the tub tomorrow) in the past on a commercial heat exchanger - with very small tubes. The stuff is supposed to be pumped through but I found it works if you leave it overnight. I can't see why that wouldn't work in a rad - unless it might react with, or melt, the tanks.

Anyway, my '95 993 rad is performing like a tiny version of that fire-engine that Richard Hammond was getting so worked up about so I'm about to order a new one tomorrow - will let you know how I get on with that.

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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Mon Sep 24, 2012 7:44 pm

PFM wrote:. I've used central heating de-furring stuff (crystalls I think, made by Fernox, will look at the tub tomorrow)

Hmm, yeah that could work too, it's the plastic I've gotta be carefully of, my only other option at the moment is a custom made rad for £175+vat, which if I was sure it would totally solve my problems then I'd order one today, however, I can't be sure at the moment, this has taught me that it's maybe a good idea to flush the cooling system through every year! Maybe I wouldn't be in such a pickle now if I had Neutral
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Mon Sep 24, 2012 9:17 pm

Only 4
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Tue Sep 25, 2012 11:28 pm

so, i have the rad in my bath, have soaked it in mr muscle drain cleaner, when i rinsed that out im sure i saw a little bit of copper coloured stuff come out, hopefully k seal and not the insides of the rad! its now soaking in harpic limescale remover.
am i right in thinking that direction of flow is (looking from the front when on van) from left pipe up and round to right pipe?
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Tue Sep 25, 2012 11:42 pm

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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Wed Sep 26, 2012 12:27 am

i just flushed out the harpic.... a large lump of something came flying out and whizzed down the plug hole before i could catch it (forgot to put something over plug hole to catch stuff!) i hope it was limescale and not part of the insides!
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Wed Sep 26, 2012 3:30 am

Good work, maybe have a look at this http://www.youtube.com/watch?v=OhScrS9U0lE
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Wed Sep 26, 2012 10:52 pm

I have made an interesting discovery....

I bought some new caps for my hijet from ebay originally, I have been doing all my testing with them so far. The seem to be made in china or something.

Now my new purchase parts hijet came with two really nice caps on it, they have "made in england" stamped on them and their shape and material is in a whole different league to the chinese ones.

So I swapped the cap under the passenger seat for the english one, and when I heated it up and cooled it back down I had ZERO air under the cap!!! Non-nada-ziltch

With the other caps I've tried I always get a little bit of air, just enough that a couple of spoons will fill back up with water.

Now the main differences between the cheap crap caps and the english supreme caps are:- the inner one way return valve works much better with loads less resistance and greater flow, the springing action feels better, and the pressed cap is loads more sturdy with little chance of deformation. I think they seal to the outer top lip much better than the cheap crap ones.
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Wed Sep 26, 2012 11:32 pm

p.s. looking at the picture of your radiator in the bath, it looks in remarkably good condition

p.p.s The "brand new radiator 2009" that came with the van for breaking is in pretty rough condition, it has some very swollen veins so I cannot offer you a spare radiator sorry.
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Wed Sep 26, 2012 11:50 pm

so on flushing out the harpic this came out of the rad, i hope its not important! it does have somr crudd attached to it so hopefully its cleaner inside now!



i decided to put some more harpic in to see if it still fizzed, it did, ive only ever seen harpic fizz like this when its eating limescale, when i can get back to the garage then ill put it all back together, hopefully the gasked in the rad is still ok and it doesnt leak now!

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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Wed Sep 26, 2012 11:51 pm

HighlyJetted wrote:p.s. looking at the picture of your radiator in the bath, it looks in remarkably good condition.

yeah from the outside it looks lovely! i have my doubts about the inside tho!!

and yeah i discovered this week that the chinese caps are defo a problem, the QH ones are much better, although the one under the passenger seat was still sucking a bit of air in, it does it when it over heats, or if its not got that hot when i stop the engine i noticed a sucking sound comming from it and a few bubbles coming out in the exp tank, possibly due to build up of pressure because of block rad tho, im not sure yet!

still have to put an extra rubber seal in the one on the rad as the plastic flage has worn so much it doesnt fit properly
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Wed Sep 26, 2012 11:58 pm

Tested my mates car with the block tester earlier, it definitely works:-





Now if you think fixing a hijet is expensive sorting this out will be bank breaker!
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Fri Sep 28, 2012 7:27 pm

I have some more ideas for you, but I do not have time to type them out right, so I'll be back later!

Otherwise how are you getting on?
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Fri Sep 28, 2012 10:31 pm

HighlyJetted wrote:I have some more ideas for you, but I do not have time to type them out right, so I'll be back later!

Otherwise how are you getting on?

Cheers HJ, am putting rad back on tommorow, I'm really hoping that

1 I've got enough crudd out of it to at least get it working for a while
2 I haven't destroyed any gaskets in the rad and find it leaks now!

I did remember that my x has a little camera on a wire he uses to look into engines and stuff so gonna see if I can see what the inside of the rad looks like! Wish I'd thought of that before I started cleaning it!
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Fri Sep 28, 2012 10:49 pm

Turns out I've ended up having a few beers and having to close one eye to type this, I will be back tomorrow x
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Fri Sep 28, 2012 11:03 pm

HighlyJetted wrote:Turns out I've ended up having a few beers and having to close one eye to type this, I will be back tomorrow x

Hehe, I'm looking forward to a few beers on Sunday Very Happy
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Fri Sep 28, 2012 11:08 pm

I think the sight in my left eye is getting worse with age and when
I have a drink I cannot focus on letters easy with both eyes open.
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Sat Sep 29, 2012 12:04 am

HighlyJetted wrote:I think the sight in my left eye is getting worse with age and when
I have a drink I cannot focus on letters easy with both eyes open.

With age? I've got 11 years on you, could explain why I go blind after a drnk then clown
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Sat Sep 29, 2012 1:20 pm

Hell I'm going to be 30 in april, major crisis coming any day!! I'm supposed to be young, and 30's not that young!

Anyway before I dig too big of a hole....

I was thinking as I drove along the other day, hell I really need a radio, The thermostat on a hijet is in a quirky place, it sits coming off the water pump, at the lowest part of the engine with that big plastic housing coming off it. Now you said that all your hoses were cold last time, yet it was over heating, and the gauge was high.

If that thermostat was closed that would happen, as it would trap the water in the block, stopping flow, so the sensor in the water in the cylinder head would get very hot very quickly - boiling off, over pressuring everything causing the blow off into the header tank.

Thinking about the likes of rad weld etc and the radiator caps, I bet it might gunge up the thermostatic spring release system in the thermostat, could make it sticky.

Now to help these hijet systems out, I would be temped to put a thermostat in with the lowest opening temperature possible.

This page on Micksgarage.com shows a very unusual thermostat! http://www.micksgarage.com/cooling-heating-parts/thermostats/daihatsu/hijet/hijet-mk-ii-box/1992-onwards/1.3-i-16v/14104/

It has an opening temp of 78 degrees, which is very very low. Most cars have thermostat in the range of about 88 degrees or higher.

Now looking at the price of the thermostats they are quite expensive, probally because they are not common. If some fuckwit puts in a thermostat they have knocking about the workshop more that likely it will not have the correct temperature range, it will be way too high, and while driving down the road the water coming back from the radiator will be too cold thus closing the thermostat thus quickly causing a boil up.

There also seems to be some indecision between the thermostat supplied by the various after market parts companies. Some are 84, some 82 and some 78 degrees.

I'd make sure I get a 78 degree one!



Now for my other thought. What I was thinking is maybe to carry out some tests to work out where the fault lies, by removing objects from the system you can at least say what isn't the fault. So what I am going to do if my red LPG van passes its MOT on monday and still has these silly faults is:-

Unplumb the LPG vapouriser by disconnecting the pipes and fitting a couple on bungs in its place.
Unplumb the in van heater matrix with a couple of bungs.

Now the system will have only the engine, the water pump, the thermostat, the radiator and the pipework to point fingers at.


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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Sat Sep 29, 2012 2:30 pm

All sounds reasonable, except the thermostat was taken out cos of the overheating, its the bottom pipes that go cool when it overheating (as your facing the van from the bottom right of the rad and the pipe leading off that) they all get evenly hot on tick over then when driven round town the temp increases, it looses the hot air in cab, the fan then doesn't kick in, if you keep diving on a clear road temp goes down, gets heat back in cab, doesn't overheat so long as I cut engine every time I'm waiting at lights, after the drive if left ticking over it will get hotter till no hot air in cab, fan won't kick in, the expansion tank now nearly full and just bubbles being expelled in there, have asked to borrow block tester as I only seem to get a decent amount of bubbles when I'm nowhere near one!
As you might have guessed, its still being a pig! All that gunk out of the rad and still no different

And yeah, I did wonder whether to disconnect the vaporiser too, although I've only been running on petrol so that shouldn't be doing anything anyway?
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Sat Sep 29, 2012 2:43 pm

I'm still puzzled though daisy, as when I've removed the thermostat from any car the temp gauge doesn't ever barely shift off the bottom and you never get any heat into the cab or anything. With the thermostat not in place the water moves way too quickly displacing more heat than required resulting in a very cold running engine - like 30 degrees.

I'd take that thermostat housing off and check it with my own eyes!

I'm not entirely sure what the heater matrix or vapouriser could be doing, but removing them sure removes that variable!! This is like a quadratic equation or something! Only by removing variables can you pin down the variable your chasing after.
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Sat Sep 29, 2012 6:39 pm

Right, so sames as before after cooling down it sucked most of the water back from expansion tank, found my turky baster now used that to put the water back into system, was about 100ml but it took some doing of squeezing pipes, starting engine for a bit then topping up a bit then doing it all again,

I do need to check for a thermostat, i really cant belive it gets this hot without one. how the hell do I get to it? I can't even see where it is!!!??

So so far All i have done is cured the leaking rad cap problem, this seems to have made little difference on the overheating (the water just gets pushed into the expansion tank earlier, even just on tickover now)
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Sat Sep 29, 2012 7:18 pm

It seems like it has been messed around with quite a lot, without anyone actually pinpointing the actual fault, and by messing with it, running it and testing, it will not have really done anything good. The rad weld treatments and various knee jerk responses to hope for a solution may have caused more trouble than good if anything.

Only by undoing some of the mess can you start to work towards the actual solution. I have taken jobs on that have been ditch by someone else, where you have to undo all of the incorrect wiring repairs etc before even knowing where your at, and even then, because you don't have a working system you cannot test what you have re-repaired.

I feel a mixture of trying to be as accurate in what you have, while reducing the amount of possibilities, can often allow you to focus down on a suspect.

the expansion tank now nearly full and just bubbles being expelled in there, have asked to borrow block tester as I only seem to get a decent amount of bubbles when I'm nowhere near one!

You are right, that's the test you need to do to work out if your going to spend the cash to do the head gasket. No point testing if you don't have bubbles or any gases expelled.
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by HighlyJetted on Sat Sep 29, 2012 7:31 pm

Thought this might help...



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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Sat Sep 29, 2012 8:43 pm

That is quite helpful HJ but where is it? I think I can see it under where the hand brake is? Does that mean I've got to remove that panel?
I think I'm so frustrated I can't even think properly about it now!
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

Post by elfin girl on Sun Sep 30, 2012 10:04 pm

Hmmm, doing lots of reading up on overheating causes and there seem to be a lot of posts on various forums (various vehicles) about over heating with no thermostat, the opinions seem to be divided 50/50 on this but there is a theory that no thermostat can cause overheating because of coolant flow being to fast and not being in the block or radiator long enough to take its heat away some of the explanations do sound feasible
I have put another seal in the cap on expansion pipe (I know it should fit, but if the flange has been cleaned with abrasives and worn....)
I have to drive it to a hospital on tue so will see what happens then, I. Guessing it will be the same so I'll then have to take it to a garage to investigate stat situation, I've now pulled my kneck out and in too much pain to be struggling with this (too many car crashes, why o why don't people crash into me when my vehicle doesn't work?!)
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Re: mechanics that are good with hi jets? (the answer to this is.... if you want a job done properly, do it yourself!)

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