HELP PLEASE need my engine swapped - Page 2

COLVERT · 17th March 2022, 18:01

Oil cooler failure.-----

Providing the engine has suffered no damage then easy to fix.

Best place to check first.---Engine change---last resort.

Mike Noc · 17th March 2022, 20:53

Unfortunately I can't see it being due to a leaking oil cooler Jon as, due to the pressure differential between the oil and coolant inside the oil cooler, you'd expect to see oil in the coolant, not coolant in the oil if the interface failed.

trikey · 18th March 2022, 06:43

I’ve been in touch with the OP and offered to fit his replacement engine, just sorting out transport to get it up to me.

Rev Jules · 18th March 2022, 07:36

Quote:

Originally Posted by trikey

I’ve been in touch with the OP and offered to fit his replacement engine, just sorting out transport to get it up to me.

You are an absolute legend and a hero.

Julien.

bl52krz · 18th March 2022, 15:35

Well done Andy. Can you tell us when you have done the job what exactly was wrong please. Thanks.

squire · 18th March 2022, 15:36

Quote:

Originally Posted by Rev Jules

You are an absolute legend and a hero.

Julien.

He certainly is. Trikey the super star 🌟 🌟🌟🌟🌟

RogerHeinz57 · 18th March 2022, 16:03

I had one do this to a chum of mine, the car was purchased for a very small sum because of the issue and the idea was considered to be head gasket failure by the seller. My chum bought this car and ran it down to me. Decided that the oil cooler had leaked internally, and purchased a replacement from Xpart, some coolant, and oil service kit. Replaced the cooler, and filled the cooling system with a mixture of pure orange juice and an oil flush ingredient. Admitedly it took a few miles and another coolant change to get the coolant system cleaned. The engine did run hot, and needed to stop to cool down prior to the repair, it ran quite strangely, but after my interventions it would run great both hot and cold. A clue when the cooler has failed apart from obvious mixing, is the thermostat housing starts to leak out past the pipe seal as the pressure is finding the weak spot and venting the pressure before the coolant tank cap opens up.
I cannot guarantee that this is the exact issue for the OP vehicle, but very likely, and much less expensive than replacing an engine, that may well do the same thing, and risking assumptions that the unit really is healthy.

Mike Noc · 18th March 2022, 22:03

Quote:

Originally Posted by Mike Noc

Paul are you getting coolant mixing with the oil in the sump, or are you seeing oil mixing with the coolant in the expansion tank?

Quote:

Originally Posted by paulbn61

Water in the oil. yellow lumpy mayonnaise.

Quote:

Originally Posted by RogerHeinz57

I had one do this to a chum of mine, the car was purchased for a very small sum because of the issue and the idea was considered to be head gasket failure by the seller.

John are you saying you had yellow lumpy mayonnaise in the sump from an oil cooler leak?

I've seen one oil cooler fail and the result was oil in the coolant in the expansion tank, which, given the pressure differentials within the oil cooler, (the expansion tank cap relief for the coolant is 20 psi and the operating pressure is likely around 15psi whilst the idle oil pressure is 21.8 psi cold and it rises from there when the engine speeds up) is the expected result.

The only way I can think of coolant getting into the oil with a leaking oil cooler is after a fully warm engine is shut down, as then the oil pressure drops off but the coolant will still be hot and under pressure, but I haven't seen this.

Arctic · 19th March 2022, 09:25

Quote:

Originally Posted by Mike Noc

John are you saying you had yellow lumpy mayonnaise in the sump from an oil cooler leak?

Quote:

I've seen one oil cooler fail and the result was oil in the coolant in the expansion tank, which, given the pressure differentials within the oil cooler, (the expansion tank cap relief for the coolant is 20 psi and the operating pressure is likely around 15psi whilst the idle oil pressure is 21.8 psi cold and it rises from there when the engine speeds up) is the expected result

.

The only way I can think of coolant getting into the oil with a leaking oil cooler is after a fully warm engine is shut down, as then the oil pressure drops off but the coolant will still be hot and under pressure, but I haven't seen this.

Hi Mike.
Rob (trebor) had the same problem new gaskets solved it after a few tries sorting it out.

http://www.75ztcommunity.co.uk/oil-c...0cooler#p88082

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steady eddie · 19th March 2022, 19:18

We had the same problem with the wife's tourer at around 185,000 miles thought it was the oil cooler swapped it out for a known good one from my tourer this did not cure the problem. We did not think the head gasket had gone as the engine ran fine and no oil in the header tank. We put it down to a liner, we changed the engine for one that had done about 98,000 miles its still going well after about another 30,000 plus miles.

18th March 2022, 06:43	#13
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	I’ve been in touch with the OP and offered to fit his replacement engine, just sorting out transport to get it up to me. __________________ Lest we forget..

18th March 2022, 15:35	#15
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,387 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	Well done Andy. Can you tell us when you have done the job what exactly was wrong please. Thanks. __________________ Great Barr, Birmingham.

17th March 2022, 18:01	#11
COLVERT This is my second home R75 Saloon. Join Date: Feb 2009 Location: France/or Devon. Posts: 14,003 Thanks: 3,851 Thanked 2,167 Times in 1,816 Posts	Oil cooler failure.----- Providing the engine has suffered no damage then easy to fix. Best place to check first.---Engine change---last resort.

17th March 2022, 20:53	#12
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,547 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	Unfortunately I can't see it being due to a leaking oil cooler Jon as, due to the pressure differential between the oil and coolant inside the oil cooler, you'd expect to see oil in the coolant, not coolant in the oil if the interface failed.

18th March 2022, 16:03	#17
RogerHeinz57 I really should get out more....... A Reasonably Priced Car Join Date: Jan 2014 Location: Burton Latimer Posts: 2,530 Thanks: 408 Thanked 1,064 Times in 712 Posts	I had one do this to a chum of mine, the car was purchased for a very small sum because of the issue and the idea was considered to be head gasket failure by the seller. My chum bought this car and ran it down to me. Decided that the oil cooler had leaked internally, and purchased a replacement from Xpart, some coolant, and oil service kit. Replaced the cooler, and filled the cooling system with a mixture of pure orange juice and an oil flush ingredient. Admitedly it took a few miles and another coolant change to get the coolant system cleaned. The engine did run hot, and needed to stop to cool down prior to the repair, it ran quite strangely, but after my interventions it would run great both hot and cold. A clue when the cooler has failed apart from obvious mixing, is the thermostat housing starts to leak out past the pipe seal as the pressure is finding the weak spot and venting the pressure before the coolant tank cap opens up. I cannot guarantee that this is the exact issue for the OP vehicle, but very likely, and much less expensive than replacing an engine, that may well do the same thing, and risking assumptions that the unit really is healthy.

19th March 2022, 19:18	#20
steady eddie Loves to post rover 75 tourer / bmw e90 320d Join Date: Jul 2011 Location: Swindon Posts: 255 Thanks: 256 Thanked 48 Times in 24 Posts	We had the same problem with the wife's tourer at around 185,000 miles thought it was the oil cooler swapped it out for a known good one from my tourer this did not cure the problem. We did not think the head gasket had gone as the engine ran fine and no oil in the header tank. We put it down to a liner, we changed the engine for one that had done about 98,000 miles its still going well after about another 30,000 plus miles.