Coolant leak from turbo side of engine?

azureblue · Post by **azureblue** » 26 Mar 2022, 16:21

Just when I was ready to replace the subframe bushings, my 2001 V70 got incontinent - it is leaking from what seems to be some place above the subframe cross member, more to the driver's side of the car. I put a catch pan under there and saw it drip, but finding the leak from the top in near impossible. And i think it just leaks when the system is under pressure... I plan to jack it and try to find it from under, tomorrow, so where should i look?
Thanks

PS - Checked the two hoses at the firewall, but they were dry

Post by **jonesg** » 26 Mar 2022, 19:51

Check it under pressure.

Post by **erikv11** » 27 Mar 2022, 00:19

There are two small rubber hoses in the metal lines that carry coolant to and from the turbo, definitely check those. #9 and #10.

: turbo cooling pipes.jpeg (31.3 KiB) Viewed 2451 times

azureblue · Post by **azureblue** » 27 Mar 2022, 07:19

Thanks - more plumbing back there than I thought. Judging by where the drip is, I am going to guess hose #8. I wish I could pressurize the system, nut I don't have that gear. I will give it a look today..

Post by **cn90** » 27 Mar 2022, 08:45

Whatever you do, use only Volvo genuine parts for the hose(s).
Best is to replace them all...

azureblue · Post by **azureblue** » 27 Mar 2022, 08:53

yeah - I plan to get them at the dealership because they have them in stock.

BTW, who keeps the belly pan? Mine is getting brittle.

Post by **erikv11** » 27 Mar 2022, 10:54

azureblue wrote: ↑27 Mar 2022, 07:19 Thanks - more plumbing back there than I thought. Judging by where the drip is, I am going to guess hose #8. I wish I could pressurize the system, nut I don't have that gear. I will give it a look today..

#8 is a copper crush washer, on a metal line.

The only rubber cooling hoses in the turbo cooling circuit are 9 and 10.

Post by **erikv11** » 27 Mar 2022, 10:56

azureblue wrote: ↑27 Mar 2022, 07:19 Thanks - more plumbing back there than I thought. Judging by where the drip is, I am going to guess hose #8. I wish I could pressurize the system, nut I don't have that gear. I will give it a look today..

#8 is a copper crush washer, at a metal-to-metal connection. The only rubber cooling hoses in the turbo cooling circuit are 9 and 10.

azureblue · Post by **azureblue** » 27 Mar 2022, 11:38

Sorry - typing without glasses on... yeah it's 9 and 10. My bad. I tried to get a visual of 9 but couldn't see it. For sure, the leak is right in that area - my car anointed me a couple of times while I was under it, and i could see where it was dripping off of..

I found Robert's 2 vids - one for supply and one for return. Of course the leaky hose is the PITA hose.

The top rubber hose - the straight one, is held on with those *(^# pinch clamps. It's in good shape but I assume the lower (inlet) uses the same type of clamps. So how do I get them loose, especially in the location the hose is in? I think I will replace the lower hose for now...

PS - it's leaking from between the hose and the metal pipe - IOW it looks like the clamp is not tight. But it's one of those crimp clamps - I think the proper term is Oetiker . First thought is to replace the clamp with a screw type. Is this advisable? The hose looks fine a little swollen but it feels firm. While replacing just the clamp is a pain, replacing the hose would be a bigger pain....

Post by **abscate** » 27 Mar 2022, 13:46

Oetikers are the right clamp to use. Screw types work , but they rust and loosen too.

At the very least, use the closed band type by Norma or ABA , not hardware store or Amazon junk