Overheating............Again

[Jamesy W]

Any motor spares place such as Halfords will stock a rad cap that will fit.

 

 

I don't live too far from a Halfords, but it's the thought of going in and having to ask one of the emo/gay/suicidal chaps for help

 

I'll give it a bash though.

[supra matt]

 

I don't live too far from a Halfords, but it's the thought of going in and having to ask one of the emo/gay/suicidal chaps for help

 

I'll give it a bash though.

 

there like that up your way to then LOL is that part of the job selection processes they have to fill LOL

 

Should not need help mate there will be one of them books to look through to tell you which one will fit .

[Jamesy W]

Haha I think my local one only employ the finest quality retards, there is one bloke that is quite useful.

 

Gonna head up just now, be back in a week.

[Kranz]

Rad cap first. If its not sealing then it'll boil the coolant at a lower temp than it should.... and it would also 'gas out' into the header tank when it heats up. The bubbling on shutdown would suggest this as:

 

1) when the engine shuts down the heat in the block & head has nowhere to go as the water pump is no longer running.

2) the heat buildup in hotspots around the bores and in the head will cause locallised boiling, which will release gas

3) that gas will cause overpressure or (if the rad cap isn't sealing at the right pressure) extra volume, which will push air out of the top of the rad.

 

The engine wasn't doing it before as the cooling system wasn't under as much loading as it is now. In effect the FMIC is like halving the rad size. It quickly shows up problems.

 

Have you tried idling before shutdown to try and get the temps down or at least reduce the localised boiling at the hotspots?

[Jamesy W]

Just in from Halfords, couldn't help as they don't stock anything or even have any supply that they can order in.

 

Steve, I tried the idling but the temps hardly budge at all, sat in it for about ten minutes the other night and hardly noticed a difference.

[R Black]

Ive had this prob not my last car and the supe both times i changed the rad cap & it was cured. Good luck hope thats all it is in your case.

[Chris Wilson]

I keep caps in stock, and am not gay, and I am fairly confident I am not suicidal i'd say a new cap will sort your issues.

[TooColdToDrive]

Rad cap first. If its not sealing then it'll boil the coolant at a lower temp than it should.... and it would also 'gas out' into the header tank when it heats up. The bubbling on shutdown would suggest this as:

 

1) when the engine shuts down the heat in the block & head has nowhere to go as the water pump is no longer running.

2) the heat buildup in hotspots around the bores and in the head will cause locallised boiling, which will release gas

3) that gas will cause overpressure or (if the rad cap isn't sealing at the right pressure) extra volume, which will push air out of the top of the rad.

 

The engine wasn't doing it before as the cooling system wasn't under as much loading as it is now. In effect the FMIC is like halving the rad size. It quickly shows up problems.

 

Have you tried idling before shutdown to try and get the temps down or at least reduce the localised boiling at the hotspots?

 

EDIT

 

Took of the rad cap, spring fell of. Ordering a new one in. Hope it stops the gurgling.

Edited February 6, 2009 by TooColdToDrive (see edit history)