S80 t6 turbo '99- carpet on driver's side wet

[537playing]

A wet carpet in my car was a clogged drain for my sunroof. Have you had the car through a car wash? When mine went though one, water was present. Do a test and open your sunroof and observe the drain hole on your driver side if that's the side of your problem. Then slowly allow water to funnel into the drain. It should drain out under the car. If it is clogged, you will notice very quickly.

[laddyboy]

I will take a look at it, thanks for the suggestion but that doesn't account for the loss of coolant. There is no visable sign anywhere in around or under the engine to accoiunt for the loss of coolant

[anelson52]

Did you check the O-rings for the inlet/outlet pipes on the heater core itself? I have a '00 S80 T6 and had the same issues you do (leaking coolant on drivers floorboard/needing to add coolant) and mine turned out to be bad O-rings. They are about $3 a piece (I got mine from AutohausAZ.com) and aren't too difficult to replace. I used this link http://volvospeed.com/Repair/heater_core.html and that took care of my issue.

Good Luck!

[lgiesbre]

I've got the same problem with my '00 S80 2.9. Pulled off the console panel and the one under the driver's side dash and it is clearly faulty O-rings as I can see where the leak is coming from. I'm going to attempt this repair myself and printed off the instructions at the link above, which seem to be very good save for one photo that is out of focus (I plan to photograph my attempt and put it in the repair database here). If anyone else is having trouble finding what that author describes as a "pick tool", another name for it is a cotter pin removal tool.

Cheers,
Lee

[lgiesbre]

Ok, I attempted this repair yesterday and it didn't go quite as smoothly as some of the other folks here have said. After MUCH difficult prying, I finally got the cotter pins out. I pulled out the lower pipe and about 1/3 coffee can of coolant poured out (so far so good except coolant burns your eyes, probably better not to have ones face under the pipe when you pull it out).

Old O-rings had sort of a square profile, new ones had round profile. I assumed the old ones were originally round but not sure this is true. It took quite a bit of force to get the upper pipe to seat back into the heater core. I could not get the lower one to seat with the new O-ring in place. I put pressure on it until I was worried that I would crack the core but it would not go. Finally had to put the old O-ring back in to get it to seat so I could drive the car.

I did take some photos that I will share in a future post after I get this resolved. More to come.

[lgiesbre]

Update - I finally finished this repair. It took me a while because I could not get the lower pipe to seat properly. After refitting it with the old O-ring and driving for another week, I tried again and got it on with a little more gentle persuasion (rubber mallet). Keeping my fingers crossed and waiting until it seems that the leak has stopped. BTW, I found it much easier to get the cotter pins out with needle nosed pliers rather than the pick tool. Your mileage may vary.

Here are a few photos to supplement the ones in Mr. Winkey's Volvospeed link above (some in that post were out of focus). Another thanks to Mr. Winkey who created the fine how-to on Volvospeed. If not for your post which made it sound so easy, I might not have tried it.

[munkey1727]

Maybe you can help me.....I have a large coolant leak....but it is on the passenger side.....Is it the o-rings or the heater core?

[boosted5cyl]

change the orings and find out the answer. no way to tell over the web to be honest,

[lotus4s]

I would bet it's the core and not just the o-rings if you have a lot of coolant on the passenger side but maybe you'll get really lucky...