marjon said:
Thought,
You do the pressure test and all is good. Have you changed the cap? It’s the only thing not in the equation when you pressure test it.

I understand that hot/cold can make leaks elsewhere but a new cap is not a lot of beer tokens :).

J
Click to expand...
I've not noticed any leaks or puddles around the cap, so I hadn't thought about replacing it yet.

It does sometimes screw on funny, so maybe it's worth a punt for a few quid
 
I do check under the bonnet when I get home, and haven't spotted anything obvious yet. The coolant also tends to leave a distinct stain on my driveway for a few days.

It's going in for suspension work later this week, so I'll ask the guys to have a quick look while the car is up on the ramps
 
Always something else with these cars 😆

Went to the garage yesterday for wheel alignment, I told them there was a slight exhaust smell in the cabin and asked them to look in to it.

They said the gaskets they used when fitting new cats for it's MOT hadn't been fitted properly, and they would replace them free of charge.

Got the car back today, and the engine seems a lot louder and growlier, also seems to pop a bit when the revs drop quickly.

Is this normal for these engines? Sounds like I've left with a hole somewhere!
 
Right, been at it today with the pressure testing.

Warmed the engine up, then fitted the pressure tester. Went to about 14 psi.
20250816_150730.jpg

Waited about half an hour, and the pressure had dropped to about 11 psi:
20250816_153911.jpg

And after an hour, it was just shy of 8 psi:
20250816_162618.jpg

So I'm definitely losing pressure to something, and after looking around, I did spot this little puddle under the throttle body:
20250816_154147.jpg

So I guess I know what I'm changing next, fingers crossed this will be the last of this problem.
 
blue_cheese said:
Right, been at it today with the pressure testing.

Warmed the engine up, then fitted the pressure tester. Went to about 14 psi.
View attachment 347805

Waited about half an hour, and the pressure had dropped to about 11 psi:
View attachment 347806

And after an hour, it was just shy of 8 psi:
View attachment 347808

So I'm definitely losing pressure to something, and after looking around, I did spot this little puddle under the throttle body:
View attachment 347807

So I guess I know what I'm changing next, fingers crossed this will be the last of this problem.
Click to expand...
The pressure will drop as the coolant temperature drops but it sounds like you have found the leak.
 
brianp38dse said:
The throttle body heater can be bypassed its not really needed in our climate, that way it will never cause a leak again.
Click to expand...
Would that just be a case of removing the two hoses and connecting them together? Or just get one length of house and connect them both on their sources?
 
Quick and simple solution, disconnected input + output of the throttle body heater and connected them together with a hose connector.
And extra clamps just to be sure.

Hope the connector is rated for at least 120⁰C.

Any issues with this setup before I take it for a test drive?
 

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