IPD sale XeMODeX - Experts in Volvo Electronics Free shipping all USA - Experts in Brakes
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy anything with this and it helps MVS!

Coolant leak

Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
iGuessImCool
Posts: 3
Joined: Wed Dec 25, 2019 3:27 pm
Year and Model: 2009 C30
Location: LA
Has thanked: 0
Been thanked: 0
United States of America
iGuessImCool

Coolant leak

Post by iGuessImCool » Wed Dec 25, 2019 3:38 pm

Hello!

Trying to figure out a coolant leak. From what I’m observing, the coolant leak is external and my car has no issues with overheating. I have seen the coolant overflow in the overflow tank, the coolant will expand and come out the overflow reservoir. I’m not sure where the extra pressure is coming from. I’ve replaced the thermostat 3 times and the tank once. I’ve relieved pressure a few different occasions, with the heat on full blast and what not but I’m still coming across this issue. Any ideas?

Thank you!

jennysass
Posts: 4
Joined: Wed Dec 18, 2019 1:26 pm
Year and Model: 2008 c30
Location: PA
Has thanked: 0
Been thanked: 0
United States of America
jennysass

Re: Coolant leak

Post by jennysass » Fri Dec 27, 2019 4:17 pm

Did you try the UV dye yet? Suck out enough coolant (Turkey Baster works well) to keep on min line, power wash engine with some degreaser, add dye, drive around slowly, check w uv light, drive fast, check again.

User avatar
June
Posts: 1647
Joined: Wed May 04, 2016 11:18 am
Year and Model: 2004 S80 T6
Location: Jacksonville, Florida
Has thanked: 259 times
Been thanked: 140 times
United States of America
June

Re: Coolant leak

Post by June » Fri Dec 27, 2019 5:00 pm

Perform a combustion gas test. You probably have a bad head gasket. Apparently the P1 cars are prone to head gasket failure. Just went through it with a 2007 C70. In our C70 the gasket failed in a way that allowed pressure to enter the cooling system, but no coolant into the cylinder or oil. Same high pressure pushing coolant out of the tank symptoms you described affected our car. It's a simple test and you'll find out for sure. June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

iGuessImCool
Posts: 3
Joined: Wed Dec 25, 2019 3:27 pm
Year and Model: 2009 C30
Location: LA
Has thanked: 0
Been thanked: 0
United States of America
iGuessImCool

Re: Coolant leak

Post by iGuessImCool » Sat Dec 28, 2019 6:00 pm

Hey June, what was the condition of your head gasket when you replaced it?

User avatar
June
Posts: 1647
Joined: Wed May 04, 2016 11:18 am
Year and Model: 2004 S80 T6
Location: Jacksonville, Florida
Has thanked: 259 times
Been thanked: 140 times
United States of America
June

Re: Coolant leak

Post by June » Sat Dec 28, 2019 7:28 pm

It was just a minor breach I think #3 cylinder. The pressure from the engine running could pass, but the coolant pressure was not enough to pass the other direction. In time it would have completely blown according to the mechanic. Both the head and block checked good without warping. Apparently this is not uncommon for these cars. Ours is a low mileage dealer maintained car. The dealer fixed it at a high cost. I'll look at the ticket and see if he mentions the cylinder that had the problem. The mechanic said it was the usual place they go. I completely trust him as he worked on my mother's cars before I was a teenager at that same Volvo dealership, that's over 40 years ago. June
My Volvo cars owned
1989 740 GLT ordered
1994 850 4door standard shift ordered
1996 960 ordered
1998 S90 ordered totalled after 3 weeks
1998 V70 GT dealer stock car
2002 S80 T6 ordered totalled
2004 S80 T6 dealer stock car and current car owned

User avatar
kallekula
Posts: 422
Joined: Sun Mar 02, 2014 12:34 pm
Year and Model: S70 2000
Location: Orange County, CA
Has thanked: 10 times
Been thanked: 8 times
United States of America
kallekula

Re: Coolant leak

Post by kallekula » Sun Dec 29, 2019 2:16 am

Buy one of those cheap kits you pressurise the coolant system with from harbor freight.

BMW 540i 2002
S70 Base 2000
S40 T5 2004.5

Post Reply
  • Similar Topics
    Replies
    Views
    Last post