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

rad been flushed, both rad caps changed (although had to make extra rubber seals cos they are a slightly different size) water pump checked, thermo switch on fan checked, thermostat changed, twice, its now removed and still not helped, i think there is now a good chance the head gasket is causing a problem but this wasnt the case when it started! it now leaks water from the rad cap slowly as its heating up, then gets hot, purges water into filler tank (which does sometimes get sucked back into system) i have found in the last couple of days that when i take off the cap under the seat there is a lot o preasure and water splurges out (this is when cold) dont know if this is supposed to happen? leak test done too, didnt find anything

That rad cap seepage issue is going to cause you big problems. If you don't keep the system 100% pressure tight it will always boil over. Next one to look at is the bottom hose on the radiator, the clip rots and often cracks, and also the bottom of the radiators are very prone to tiny leakage that doesn't show when cold. You can normally tell though because the bottom 2-3 inches of the rad will be a different colour and the end cap clamps will be rotten. It will require the bumper to be taken off to inspect it properly which is a 2 minute job.

Logi wrote:Just read this. Earlier post question about seals has been answered, simple answer here is if the rad cap dont fit its the wrong one. I just replaced mine, no need to bugger about with seals. Whats the cap pressure?

Logi wrote:I read your other post. There's air in the system, you dont mention the bleed valve so i guess youre not bleeding it from there?

Donella-marie Webb looks interesting site, about the only thing i have to offer about my hijet at the moment is AAAaaaaaRRRRRrrrGGGggggggg!!!! it realy is a love hate relationship and leaning more towards hate! the overheating issue is beyond a joke now!
8 hours ago · Like · 1

Matt Simpson What have you done to try and fix it?
3 hours ago · Like

Donella-marie Webb rad been flushed, both rad caps changed (although had to make extra rubber seals cos they are a slightly different size) water pump checked, thermo switch on fan checked, thermostat changed, twice, its now removed and still not helped, i think there is now a good chance the head gasket is causing a problem but this wasnt the case when it started! it now leaks water from the rad cap slowly as its heating up, then gets hot, purges water into filler tank (which does sometimes get sucked back into system) i have found in the last couple of days that when i take off the cap under the seat there is a lot o preasure and water splurges out (this is when cold) dont know if this is supposed to happen?
3 hours ago · Like

Donella-marie Webb leak test done too, didnt find anything
3 hours ago · Like

Matt Simpson That rad cap seepage issue is going to cause you big problems. If you don't keep the system 100% pressure tight it will always boil over. Next one to look at is the bottom hose on the radiator, the clip rots and often cracks, and also the bottom of the radiators are very prone to tiny leakage that doesn't show when cold. You can normally tell though because the bottom 2-3 inches of the rad will be a different colour and the end cap clamps will be rotten. It will require the bumper to be taken off to inspect it properly which is a 2 minute job.
3 hours ago · Like

Donella-marie Webb yeah, the rad cap leak is a new oneso untill i can stop that ive got no chance! i made a new silicone seal from one of those cake cases last night to hopefully stop the water coming out there! ill investigate the bottom of rad tommorow, loosing light now, how do i get the bumper off??!!!
2 hours ago · Like

Matt Simpson There's a screw at the bottom when you open the doors, a couple under the bottom of the bumper, and then there is two in the bumper front itself - like down some circular recess hole bits under the head lights but above where the optional extra fog lights go. I think they are all 10mm.
2 hours ago · Like

Donella-marie Webb ok ill have a look before it gets too dark then hopefully do it tommorow, cheers!
2 hours ago · Like

Donella-marie Webb internet is handy for some stuff, i got a manual on disc, but no mention of how to remove body work and stuff to get to things!
2 hours ago · Like

Matt Simpson I'm not a big manual user myself, I tend to just work it out as I go along - except for wiring, where a diagram is handy but not always available thus going back to make it up as you go along
2 hours ago · Like

Matt Simpson Have faith, you will get to the bottom of this if you make no assumptions.
2 hours ago · Like

Donella-marie Webb hehe, yeah, i wouldnt mind if i had a driveway and a spare vehicle while this one is missbehaving!
2 hours ago · Like

Donella-marie Webb well i can certainly manage to get the bumper off providing the bolts arnt rusted on, which tells me that rad was not removed and flushed by a person that said theyed done it!!
about an hour ago · Unlike · 1

Matt Simpson Here we go, this doesn't surprise me. Typical garage syndrome.
about an hour ago · Like

Donella-marie Webb yeah, even worse that said mechanic was my self employed (now ex) bf!!! (he is a very good mechanic, just not when it came to fixing mine!)
about an hour ago · Like

Matt Simpson Making money out of cars and customers is 100% incompatible with being honest. That's why I don't and cannot work in that industry. Fixing a hijet will cost more than it's worth when it costs £60 per hour in the workshop plus parts and VAT.
about an hour ago · Like

Donella-marie Webb yeah, he dont charge that much tho, the cheepest and most overworked mechanic in the area, just a shame he prefered it if i couldnt travel far on my own! does give me a bloody good reason to be able to fix the thing for myself tho, that would be a poke in the eye for him!
about an hour ago · Like

Matt Simpson Also so you know, to change a thermostat on a hijet takes quite a long time as its hard to get too under the inlet manifold. Its a right swine of a job actually.
29 minutes ago · Like

Donella-marie Webb i was trying to figure out where it was so i could tell if anything had been done in that area, the problem actualy started with me having no heat at all in the winterr even though it was running fine, was told there was no stat so one was put in then the overheating problem started in the summer!
24 minutes ago · Like

Donella-marie Webb so would i need to jack it up and get underneath to get to the thermostat? im sure imcapable of doing it if i know where it is! and does it need gasket? (cereal box!)
18 minutes ago · Like

Matt Simpson no the thermostat is on top of the engine, you can sort of see it under the seats, its right in the middle buried under the inlet manifold. As I said its a bitch of a location!! It has a black plastic theromstat housing which has a 90 degree bend on it. If we move this chat over to the forum I will post up some diagrams
4 minutes ago · Like

Donella-marie Webb ok

daisydon wrote:logi, i have googled your part number and come up with nothing!

daisydon wrote:

Do you know how Google works? Took me 10 seconds

clearly not!
nothing seems to be working how it should be round here
the mesurements are the same as my new ones so it shouldnt be leaking then, im now totaly stumped, there are no cracks that i can see round the mouth of the rad opening the water is seeping out from under the cap, now im presuming if the pressure gets too high the then it would leak from out the top of the cap?

HighlyJetted wrote:Tomorrow afternoon when I get back from college I am going to take my LPG hijet to bits and find out what is the probable cause of the overheating so I might be able to offer more useful guidance but don't hold your breath.