hi just changed my rad on scooby turbo year 2000 becauce it had a crack on the side plastic of the rad. i have tryed bleeding the system a number of ways and putting a new thermostate in but still got no heat from heater in car and over heat when driven but not when idling help please it driving me mad????

 

sounds like its still air locked

 

Just keep at it mate. Heater to hot and blowers on, massage the bottom hose whilst topping up via the header tank until you feel the bottom hose warming up

 

Abit of foreplay will do it

 

lol thanx for that just tried bleeding again still no look but now i have hot air on min then next i havent but ther is a lot off pressure in the header tank so tried driving with it undone a bi and never over heated once any ideas could it still be an airlock?

 

still airlocked

 

If all you have done is change the rad, then it can only be an air lock

 

hi ive change the radiator and thermostat but it seems there is a lot of pressure in the header tank also the bottom radiator hose is cooled even tho the water is boiling hot? its really getting on my nerves now y do they make it so hard to bleed these cars?

 

header tank cap off and hold some revs on and then massage bottom hose to help push the air lock out, you will get there.

 

ok thanx will have another go tomorrow when ive carmed down otherwise i might just hit it with a hammer lol! o just one more question you dont think it might be hg that has gone as the radiator was cracked i had been putting water in it for about 3 weeks every day till i found the crack , because like i say if i let the cap off a bit it dont over heat that would be the same as the crack in the rad? thanx for all you help

 

did you let the car boil at any stage ? without testing for headgasket failure its a guessing game.

 

the temp has reached the hot mark on temp gauge but switched straight off once there.

 

hi had the same problem with my classic when i refited my engine the way i got round it was to undo to bottom rad hose and fill the header with coolent and then put the bottom hose back on when coolent was running through then i back filled the system using the water pipe on the back of the header tank that goes down near the turbo this sorted my problem good luck

 

hi classicmike thanx for your reply will try it that way in the morning.

 

hi guys have tried bleeding again and again no look been adviced by a friend that it could be my water pump gone as it seems as the coolent is not going round and when the water is spiting out the header tank it is when its boiling just woundering what you guys think could he be right would i not have heard it going??????????????????

 

its worth removing the new stat and testing it in some boiling water just to make sure it is opening.

Just cos its new, dont assume its working

 

same happened to me, i let it overheat, which fryed the head gaskets, the temp gauges are crap it would have been well to hot before your gauge shot up

 

hi guys thanx for that took thermo out and its opening at about 79 degs so think its ok and i have done a block test to see if hg is leaking and lequid stayed blue this is really puzzling me?

 

So it's air-locked then.

If it was me, i would drain the system first.

Then take the rear most hose off the header tank, get a funnell and back fill the system through that rear hose. Do it very slowly so as to avoid any spit back or bubbling, it can take a while on a fully drained system, so patience is a must When it's full put it (the rear hose) back on, then fill the front of the system through the header tank in same manner

 

hi b13bat can you explain a bit more mate which heater pipe should i fill looking at engine the one on right or left mate i think the one on left is the way the circulation goes? thanx

 

The one furthest back mate, the one facing the windscreen, on the left iirc

 

empty completely,remove header tank cap, refill via the turbo ie remove pipe from header tank going to turbo . and refill with a funnel .

 

just a quick post to say thanx to everyone that keeped me going with the bleeding got there in the end.

 

good man

 

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