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What is it this time?

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo XC90s. The XC90 proved to be very popular, and very good for Volvo's sales numbers, since its introduction in model year 2003 (North America).
GonzoGirl5
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What is it this time?

Post by GonzoGirl5 » Mon Jun 15, 2020 6:14 pm

OK! So, we had replaced just about everything and thought to ourselves, what could possibly happen now? New transmission, radiator, the entire front end, I mean the list just goes on and on. Because we love this stupid car. OK I love the car my he has gotten to know it very well. This is now our problem. We are thinking blown head gasket...but figured we would ask the folks who know best and always help us out.
We have water in the oil as well the coolant overflow reservoir now smells like fuel. There is no white smoke from the exhaust. Just figured I would throw it out there to see what you all had to say. Thinking of buying a donor car. But then we are back to the same problem with the transmission etc. Not new to this temperamental car. What is it you think is the problem and what are your suggestions? Besides get rid of it. That is not an option at this point.

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2000c70hpt
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Re: What is it this time?

Post by 2000c70hpt » Tue Jun 16, 2020 6:22 am

Sounds like the head needs to come off. Though the oil cooler could have an internal leak
2000 C70 hpt with 140k
2008 xc90 t6 non turbo with 170k

Masscomguru
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Re: What is it this time?

Post by Masscomguru » Tue Jun 16, 2020 10:15 am

^^ I would get a pressure test on the coolant system before anything and check the transmission for coolant.
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GonzoGirl5

GonzoGirl5
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Re: What is it this time?

Post by GonzoGirl5 » Tue Jun 16, 2020 11:24 am

Yeah, we were thinking the oil cooler was the problem and not the head but the fuel in the overflow coolant reservoir kind of kicked my butt you know? I love this car but it has kicked me in the teeth. I often wonder if it is worth it. We have about 7k in this car now and could never get our money back out of it and this last set back is a doozy. Thanks for your info

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2000c70hpt
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Re: What is it this time?

Post by 2000c70hpt » Wed Jun 17, 2020 10:27 am

If the coolant smells like fuel, or exhaust, that's typically a cracked head. Though as exhaust gasses enter the cooling system, it'll boil over and overheat a well. If you can do a cylinder leak down test to verify the head and gasket are OK. If yours is the turbo model, you could have a cracked center housing on the turbo letting exhaust/ fuel oders in that way as well.
2000 C70 hpt with 140k
2008 xc90 t6 non turbo with 170k

GonzoGirl5
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Re: What is it this time?

Post by GonzoGirl5 » Wed Jun 17, 2020 3:13 pm

with all of these suggestions, if it is any one of theses things mentioned. Is it worth it to repair or just say forget it and cut our losses?

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2000c70hpt
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Re: What is it this time?

Post by 2000c70hpt » Thu Jun 18, 2020 7:17 am

At this point is up to you. How much do you really like the car. And how hard are you going to kick yourself later for getting rid of it. For me. I'd fix it, especially considering how much has been dumped into it already. If it is the turbo I'd definitely put one on. And since it's off, now would be the time for an upgrade. The head isn't that bad to do, you just have to get the cam lock tool. Now this is all assuming you have the t5 engine and not the 3.2/3.2t engine. The diagnostics are still the same though. Pressure test the cooling system with plugs out just in case it is a head. And go from there. My friend did a pressure test on his c70, and hydrolocked the engine cause the pressure dumped cooling into the cylinders. He went to start it and two weeks later a new engine
2000 C70 hpt with 140k
2008 xc90 t6 non turbo with 170k

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SuperHerman
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Re: What is it this time?

Post by SuperHerman » Sat Jun 20, 2020 12:41 pm

Check the cooling lines near the radiator. There is a junction which has been known to cause issues. It was one of the early fail points on the early models of the car and would take out transmissions.

Pull out the spark plugs and look down the hole and see if you see signs of coolant top cleaning.

The motor is not known to have head gasket issues unless over heated. I had a S80 which had a faulty head gasket, but that as in mind a defective part as it had it almost its entire life. No one found it until it totally failed, after about 50-60k miles.

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