|
||
|
4th January 2019, 21:33 | #11 |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
Location: Former Middlesex
Posts: 20,411
Thanks: 1,587
Thanked 3,749 Times in 3,181 Posts
|
Thanks for the detailed evidence David. I can understand what you're thinking now. How did this happen? Is this car a recent purchase?
Unless you can think of a way of identifying which bank is at fault, it's off with both heads for a head gasket inspection. I did this many years ago with an Alfa V6. It's not as bad as it sounds. Simon
__________________
"Whatever is rightly done, however humble, is noble." Sir Henry Royce. |
4th January 2019, 21:46 | #12 |
I really should get out more.......
MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011
Location: Romsey
Posts: 2,294
Thanks: 553
Thanked 573 Times in 385 Posts
|
I’ve had her almost 3 years Simon, apart from 2 failed crank sensors the car has never failed me and I wouldn’t of hesitated going anywhere in her, new belts about 7 months ago as well . 😟
One last thing I will check tho is the oil cooler, but I can’t see how I’d be getting coolant from a failed cooler into the combustion chamber. At least I can try and eliminate it tho. |
6th January 2019, 09:46 | #13 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
|
6th January 2019, 10:05 | #14 |
I really should get out more.......
P6B, L550, Imp, F56, Commando Join Date: Nov 2006
Location: Aberdeenshire
Posts: 2,886
Thanks: 352
Thanked 677 Times in 440 Posts
|
Couldn’t that also be a symptom from air trapped in the system ? If there were a crack, Surely any residual compression would also bleed off with the engine stopped, ie though piston rings or valve seats or crack in liner or piston itself? if pressure can get in it can also escape back the same way too unless it was a volume of air or gas trapped?
I would suggest the OP checks and if applicable retorques up his inlet manifolds set screws, as they do have a habit of weeping after many miles. I have came across a number of V6 manifolds that leak due to this. Coolant can leak into the cylinder from here too. The gaskets were not at fault in these examples, it was just settling in that caused the weeping. The practice of retorting is very worthwhile after some mileage runnning especially after maintenance work on the manifold. Then proceed with simple bleeding procedure again. Last edited by Lovel; 6th January 2019 at 10:16.. |
6th January 2019, 12:21 | #15 |
I really should get out more.......
MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011
Location: Romsey
Posts: 2,294
Thanks: 553
Thanked 573 Times in 385 Posts
|
|
6th January 2019, 12:33 | #16 | |
I really should get out more.......
MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011
Location: Romsey
Posts: 2,294
Thanks: 553
Thanked 573 Times in 385 Posts
|
Quote:
Looking and reading about your very impressive quality of work Gary I can only say I wish I was closer to you. |
|
6th January 2019, 16:48 | #17 | |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
Quote:
In some cases yes, in others no. Read up the Bunson Valve principle, which allows one way passage of compressed gas through a fissure. Significant overpressure released when opening the cold cooling system has to be a permanent gas injected there since the cold system was last opened up. No other physical effect can cause it. (Ignore atmospheric pressure and ambient temperature differences, which have negligible effects). TC |
|
6th January 2019, 17:34 | #18 | |
I really should get out more.......
P6B, L550, Imp, F56, Commando Join Date: Nov 2006
Location: Aberdeenshire
Posts: 2,886
Thanks: 352
Thanked 677 Times in 440 Posts
|
Quote:
|
|
16th March 2019, 16:31 | #19 |
I really should get out more.......
MG ZT V8, MGZT 135 derv ,MG TF 135 Join Date: Dec 2011
Location: Romsey
Posts: 2,294
Thanks: 553
Thanked 573 Times in 385 Posts
|
A quick update.
Cylinder no 3 on the front bank is the culprit, I removed the plugs and that one was wet, put it back in with the others removed, filled the coolant tank right up and spun it over, bubbles galore, Just have to pull it apart and fix it now. |
17th March 2019, 10:01 | #20 |
This is my second home
Rover75 and Mreg Corsa. Join Date: Nov 2006
Location: Sumweer onat mote o'dust (Sagin)
Posts: 21,753
Thanks: 341
Thanked 3,660 Times in 2,924 Posts
|
Thanks for the update. But unhappy news.
TC |
|
|