cars runnin lumpy(hunting)blowin out white smoke even when warm 1.6 cvh efi turbo,also expansion tank pressurising???

 

sounds like it could be

 

do a compression test and see what results you get!

 

will do one at the weekend and see wht it comes out like

 

Im feckin sick of this car im sure the piston tops have been finished wrong.

 

Just done a comp test and all 4 cylinders are at 150 psi is this ok if so any ideas why im gettin realy bad pressure in water pipes and expansion tank????????

 

Water pump or stat mate???????

 

had the car sat idlein last week for a while and ended up burstin a water hose,replaced it and thought nothin of it just thought it was a fooked hose,but checked the other day and pipes are gettin realy hard with pressure but fan still kickin in as normal,if i open expanion tank bottle a little the water wants to exit sharpishcould stat cause this???

 

Anyone any ideas???

 

take the stat out and runt it upto temp see if that sorts it

 

will have a go at that 2 moz and see if that sorts it

 

forgot to mention the water is comin out extremely orange(rust coloured)could it be a fooked radiator????

 

could compression be ok even if head gasket has gone?? wondering if it goes on the water side would a standard comp test not show this???dont realy want to strip it down to find head gasket is ok and comp test is sayin the gaskets fine in my eyes?? ANYONE???????

 

id do as already said.take stat out and run up to temp.
id also take hoses of radiator and flush out out with a hose and just make sure your getting a decent flow out of it and aint blocked.
i take it youve run it for a while with the cap off to make sure all airs out the system?

 

yeh done that but just ends up coming out of tank,cant understand why im gettin gud comp test but could ithave gone on water side?? headgasket got done 4 months ago and used standard ford gasket dont want to take the head off to find theres nowt wrong with the gasket

 

hi m8, im having exactly the same issues at the mo (see my thread, cossie boiling water), it drives fine then all of a sudden, if sitting in traffic for more than a min, loads of steam comes out of the bonnet vent. almost look like its on fire!!!!

mine is also hunting when its warm. infact i have all the same symptoms as you.

done some checks, head gasket seems fine, and no traces of oil in water or white mayo anywhere in engine. thought it was my fans not cutting in in traffic, but my fans are working. you can test this buy putting the air con on, they should come on about 30 secs later.

i too took of the cap and couldnt see fook all there was so much steam.

had a good poke around underneath the return rad hose was rock hard with pressure and v hot. felt the inflow rad pipe and it was barley warm.

have to felt the hoses for temp difference.

im just letting the old girl cool off then im gna whip out the thermostat, and give it a go.

i cant believe we are having identical problems, thought i was the only one. only had the car 5 days!!!! but it has been sitting for 18months. so its bound to be a bit stiff.

i'll let you know how i get on. have you tried your stat yet??

 

cheers fella,i havnt got round to havin a look yetas ive been busy,i just didnt want to take head off to find feck all wrong with it,when i get chance i will run it back up to temp and have a feel of all the pipes then go from there,got afeeling it could be a fooked rad.

 

right just ran it upto temp all pipes are hot,left cap off expansion tank and water just came out like it was being sickthink its deffo head gasket

 

ive just taken my thermostat out. put it in someboiling water and nothing happened. did this twice and still nothing. its supposed to open at about 88c i think.

so ive put the pipe work back together, minus stat. gna see what happens.

only thing i cant get my head around is the hunting, it hunts at idle from about 800 to 1200 rpm. all i can think is as the temp guage is wrong, due to no water flow in the rad, the ecu,s is sending the wrong fuel mix?? i hope it sorts this problem too.

then it should run sweet as a nut.

 

i thought it was a presurised system, so this may explain why its chucking water out. have you tried it with cap the on?

was the left hand pipe as hot as the return flow?

 

with cap on sum of the water pipes start expanding as if there going to burst had one burst last week but just changed it thinkin it was just a dodgy pipe obviously notgot to be head gasket

 

right just decided im goin to go take the head off it now

 

NOT the head gasketits fine so must be something else

 

you can have a head gasket go without effecting compression as there is several places it can go-oil to water, oil to bore, bore to water etc, if you think its a head gasket you can get a testing kit which u push into header tank, let the car warm up then thr chemical inside the kit will change colour if gasket has gone , i got told a few times my gasket hadnt gone on my old frst, i knew it had, i got odd miss fire on start up for a few seconds etc. great bit of kit though.

 

whilst the heads off check the water pump? and try stat like mentioned, seems as though something on the cooling system isnt operating, leaving pump and stat, good luck

 

thats what im goin to do whilst head is off thanx fella.

 

bloody hell, you got the head off quickly.

the pipes will look as if there going to burst, cos basically you header (and my) tank are acting as the rad, as the thermo has 'blocked' the rad off.

did you try the thermo first before taking off the head?

i still havnt fired mine up, ad dinner and fell asleep. i will try tommrow and let you know how i get on. you a braver man than me taking the head off so soon.

 

no didnt check stat first just took the head offive got to sort a few other bits out anyway so the head would have had to come off eventualy anyway just came off sooner rather than later.Turns out it was the stat stuck closedoh well spend sum more money on it now with gaskets,oil etc etc

 

oh well, yeh ive just taken mine for a spin. then left it standing. all seems well. so hopefully thats sorted.

its still hunting though?

let us know when you do get round to running it, hopefully youl have the same results as me, not the thermos been sorted!

 

yeh will do fella just hope it sorts it.