Turbotubbs

New Member

• May 13, 2014

• #1

Hi, wonder if anyone might have an idea what's causing my v8 to overheat - it's got me stumped.
I did have little bubbles in the radiator, so suspected head gasket and had heads skimmed 20thou (the most LR recommend to skim) and fitted composite gaskets. While the heads were off, I checked the liners and they're fine - the engine is in good condition as far as I can see. The bubbles are gone now but the engine still overheats after a mile or so.
I fitted a brand new thermostat, so that's not the problem, although the symptoms would suggest a stuck stat as it just keeps getting hotter as it runs. Having read a post on here I refilled the coolant correctly through the filler jobby on top of the left bank, and can see it flowing round the radiator as it should.
What is worrying me is that the plenum chamber is roasting when I run it - surely if it's drawing cold air through it, it should be cold?
The engine has a high lift cam and a pipercross air filter which I inherited from the previous owner, otherwise standard.
Any suggestions greatly received.
Cheers, Liam

 

Dr_evil

Banned

• May 13, 2014

• #2

have you checked the radiator ?

 

Turbotubbs

New Member

• May 13, 2014

• #3

Call me stupid, but I haven't! I saw water flowing round the top and didn't give it much more thought... is the a way of testing it without draining it?

 

Dr_evil

Banned

• May 13, 2014

• #4

make sure its hot all over

 

jamesmartin

Well-Known Member

• May 13, 2014

• #5

Turbotubbs said:

Call me stupid, but I haven't! I saw water flowing round the top and didn't give it much more thought... is the a way of testing it without draining it?

Click to expand...

feel it once engines hot ,it needs to be hot all over if ok

 

Turbotubbs

New Member

• May 13, 2014

• #6

I'll check tomorrow (the neighbours wouldn't appreciate me running it now) but I'm pretty sure it's hot all the way through. That does seem like a good theory though, it was running fine then got hot whilst playing in the local quarry... Not been right since

 

jamesmartin

Well-Known Member

• May 13, 2014

• #7

does it lose coolant ?

 

Dr_evil

Banned

• May 13, 2014

• #8

if it got hot while playing odds are rads full of mud

 

Turbotubbs

New Member

• May 13, 2014

• #9

No, coolant has stayed the same for the last 3 - 4 miles since the heads were changed

 

Turbotubbs

New Member

• May 13, 2014

• #10

I thought that, I gave it a good run through the lake to make sure! 😊

 

Turbotubbs

New Member

• May 19, 2014

• #11

Finally got round to checking, and I feel like a bit of a tool - heater is blocked up completely! Managed to find a brand new 'old stock' genuine replacement on flea Bay for £170 delivered, hope that'll do the trick...