What are the chances my XC60 D5 has headgasket issue?

[Mook]

Originally Posted by Bagheera

Thanks for your thoughts.

Nope, it's manual so I think that is on the low side. Connection to the overheating issue?

As soon as the temp started to raise on the dual carriageway, I backed off and it returned to normal with no obvious coolant loss on the journey.
I didn't fancy another steaming engine half an hour from home, so didn't wait to find out if it was going to dump a load of coolant either.

I only wish I'd driven the car a decent amount before I had the cambelt done; would have been so helpful to know for certain if the fault was there pre cambelt + water pump or only post cambelt. That would have almost made certain the fault was with the water pump.

Hiya chaps,
It's not the EGR cooler on the blink is it? A leak should leave a crusty residue.

[Simmy]

if a non genuine water pump has been used it may be faulty. iv seen cheap water pumps with melted or detached impellers is it possible that your car was doing a regen as the temperatures do rise significantly also check rad for any small leaks which only show when hot / pressurised pin holes can also occur on egr coolers

[Bagheera]

Originally Posted by Simmy

if a non genuine water pump has been used it may be faulty. iv seen cheap water pumps with melted or detached impellers is it possible that your car was doing a regen as the temperatures do rise significantly also check rad for any small leaks which only show when hot / pressurised pin holes can also occur on egr coolers

Thanks Simmy.

I'm 99% sure the car is losing coolant then starts to over heat. Pretty close together and at higher speeds. At 70 - 80mph, within about 2 minutes at those speeds, over heating then low coolant warning.

If an impeller was detached or melted, would that cause a leak? Or would it have to be a faulty/damaged gasket for it to leak?

[GrahamBrown1]

Originally Posted by Bagheera

Thanks Simmy.

I'm 99% sure the car is losing coolant then starts to over heat. Pretty close together and at higher speeds. At 70 - 80mph, within about 2 minutes at those speeds, over heating then low coolant warning.

If an impeller was detached or melted, would that cause a leak? Or would it have to be a faulty/damaged gasket for it to leak?

If this is the case, it needs to be pressure tested. Both hot and cold. It needs to be pressured to just over a 1 bar and left for as long as possible. This will confirm any coolant leaks either internal or external. External is easier to fix, gasket, hoses ect internal your looking at either a head gasket, cracked liner or EGR cooler.

If the water pump is of poor quality and not circulating coolant correctly the car will overheat Quickly but it would not cause leakage unless the gasket was damaged but all would be evident in a pressure test.

[Bagheera]

Originally Posted by GrahamBrown1

If this is the case, it needs to be pressure tested. Both hot and cold. It needs to be pressured to just over a 1 bar and left for as long as possible. This will confirm any coolant leaks either internal or external. External is easier to fix, gasket, hoses ect internal your looking at either a head gasket, cracked liner or EGR cooler.

If the water pump is of poor quality and not circulating coolant correctly the car will overheat Quickly but it would not cause leakage unless the gasket was damaged but all would be evident in a pressure test.

Thanks Graham.

My own opinion is the water pump gasket being faulty or damaged. There is no way that car could have been driven 2 hours at motorway speeds by the driver who delivered it to me.

HG, EGR & Cracked liner would surely present other symptoms. She sounds as sweet as a nut, no white smoke, no rough idle etc. It's purely the overheating and coolant loss.

It's back at my independent next week. If they still can't find the issue, it's off to a Volvo specialist.

Will keep you all posted and thank you for the excellent advice.

[Simmy]

i know it may be a daft question but do you have the correct 50/50 coolant mix as a weak mixture can cause over heating as it expand quicker and forces the liquid out of any points of escape cap overflow ect.

[The Thong]

Originally Posted by Bagheera

Thanks Graham.

My own opinion is the water pump gasket being faulty or damaged. There is no way that car could have been driven 2 hours at motorway speeds by the driver who delivered it to me.

HG, EGR & Cracked liner would surely present other symptoms. She sounds as sweet as a nut, no white smoke, no rough idle etc. It's purely the overheating and coolant loss.

It's back at my independent next week. If they still can't find the issue, it's off to a Volvo specialist.

Will keep you all posted and thank you for the excellent advice.

If you don’t mind me asking, what indi are you using? I know to GRN and Pye. GRN are or were good when I used them.

TT

[Bagheera]

Originally Posted by Simmy

i know it may be a daft question but do you have the correct 50/50 coolant mix as a weak mixture can cause over heating as it expand quicker and forces the liquid out of any points of escape cap overflow ect.

Not daft at all. Worth checking everything!

Yes, correct mix. There was onc occasion where I just used water to top up, but it wasn't a lot (I'd run out of Coolant). The rest has been ready mixed 50/50.

Can someone just confirm the correct coolant for the D5?

Thanks

[Bagheera]

Originally Posted by The Thong

If you don’t mind me asking, what indi are you using? I know to GRN and Pye. GRN are or were good when I used them.

TT

Sorry, when I said Independent, I just meant my local garage! Non Volvo specialist but they've looked after all our cars for years.

I'm open to any recommendations re Volvo specialist so that's good to know. I'm Worcester area.

Anybody know of any in the Worcester/Evesham areas?

[Simmy]

i always use the genuine volvo stuff its only slightly more expensive than others and can be bought on line from volvo ebay shops or go in to the dealer ask for discount as they wont offer it voluntarily.