'01 V70 X/C Heater Core O-Ring Question 8693268

Post by **benpineapple** » 17 Apr 2021, 16:56

Hello!

My partner's '01 V70 X/C developed the coolant in DS floormat issue. I removed the trim and it's pretty clear the O-rings are leaky input/output lines. No sign of leakage originating from a lower point. I got the clips out easy enough, and the O-rings didn't look good. Hopefully replacing them fixes this slow leak.

Question: The rings I pulled out are square o-rings, but all of the replacement parts (OEM PN 8693268) are rounded o-rings. I double checked the parts diagrams from 2 sources, both have the same PN and show a rounded o-ring instead of the squared o-rings that were on the car. Have the squared o-rings been superceded by rounded o-rings?

Do I need Volvo o-rings, or can I get something that fits from my local hardware store? I was thinking I could get a few thickness options from the hardware to see what fits best, of course the matching inside diameter from the rings I pulled from the car. Not sure if it matters, or if the Volvo ones are made from a different and/or special material?

And lastly, should I use any kind of lubricant to easy the install, or should the new rings go on dry?

Thanks! Been a while since I've posted here. Nice to see some familiar usernames still on here. Cheers!

Post by **firstv70volvo** » 17 Apr 2021, 19:22

benpineapple wrote: ↑17 Apr 2021, 16:56 Hello!

My partner's '01 V70 X/C developed the coolant in DS floormat issue. I removed the trim and it's pretty clear the O-rings are leaky input/output lines. No sign of leakage originating from a lower point. I got the clips out easy enough, and the O-rings didn't look good. Hopefully replacing them fixes this slow leak.

Question: The rings I pulled out are square o-rings, but all of the replacement parts (OEM PN 8693268) are rounded o-rings. I double checked the parts diagrams from 2 sources, both have the same PN and show a rounded o-ring instead of the squared o-rings that were on the car. Have the squared o-rings been superceded by rounded o-rings?

Do I need Volvo o-rings, or can I get something that fits from my local hardware store? I was thinking I could get a few thickness options from the hardware to see what fits best, of course the matching inside diameter from the rings I pulled from the car. Not sure if it matters, or if the Volvo ones are made from a different and/or special material?

And lastly, should I use any kind of lubricant to easy the install, or should the new rings go on dry?

Thanks! Been a while since I've posted here. Nice to see some familiar usernames still on here. Cheers!

The round o-rings should be correct. When I replaced those seals they were hardened from age and heat and took the shape of square type seal. I recall they took more force than expected to insert so I think they compress quite a bit when installed. Lubricate with silicon grease or spray if you have it.

Post by **abscate** » 18 Apr 2021, 05:35

Can you measure the OD of and thickness of the oring and document here please?

Best. Way is to just lay the oring down on a scale with the max width on the graduations and take a picture

darylrobert · Post by **darylrobert** » 19 Apr 2021, 04:10

i noticed the shape difference also but as said it was because they were pressed square with age. i got the "0" rings from IPD i dont bother experimenting and used some silicon grease . make sure to push hard on the pipe and the clips should go back on easily.