DIY: 1998 S70 GLT Turbo Coolant Hoses and 2 Radiator Hoses

[mecheng]

I think that I have decided to play smart for once. I monitered the area and deetermined that there is not any seepage, ran a bead of silicone caulk around the perimeter of the threaded interface, and have decided to call it a day.
I will have to say that the mention of an allen wrench in the last post here...well I am going to take one more look. I think the center opening in what is left of the petcock is circular, but maybe I did not give it a close enough look. If what I have left is still keyed for an allen wrench...then maybe, but I am so proud of myself for leaving well enough alone and not furthering my headache that I may leave it.

It is an hex slot for an allen wrench on both my 850 and S70. I've always used an allen wrench to release the petcock, I've never used a socket. The calking will not last long when exposed to heat and dirt.

[cn90]

@castconcrete,

If you have the new petcock then:
1. Drain coolant by d/c lower rad hose, collect coolant in a clean pan.
During refill, use coffee filter/funnel to keep dirt/bugs out.

2. You may want to drill the old petcock out, then replace with new. Just go easy with the drilling business.

Or you can leave it alone as you said... but soon or later you may want to do the permanent fix.

[Rumble]

Although the OP is a year or so old, I just wanted to say thanks for the writeup. I just did the turbo inlet hose, and while it was a monster pain in the rear, it went exactly as planned. Which is a first time event for me and my S70.

I ended up filthy, but I got the hose replaced.

[abscate]

Grime of passion.

Bravo Zulu

[songzunhuang]

The day before a long Thanksgiving trip, our old (228K miles) trusty 1998 V70 T5 sprung a surprise on me. As I pulled into my driveway, the coolant light came on. I thought it was just a little low on coolant, but imagine my surprise when I got out and saw this.



You can see the driving pattern I use to get my car into the parking spot.

So I spent the better part of an hour trying to figure out where the leak was coming from. The dripping was evident in the transaxle gear case. Here's a picture of the drip in action. You can also see the large black metal engine mount bracket (upper left) that is blocking any view to the turbo hoses.



I couldn't see any moisture around or along the heater core hoses that go into the firewall on the passenger side. The pooling of coolant was on the top of the transaxle. Head scratching ensued. That spot does appear to be just below the turbo coolant hose area, but I can't see the hoses.

After searching and reading this thread, I suspect it's the turbo coolant hose(s). I went under the car again, but I can't get a clear view of them. It's blocked by a motor mount from below and for the life of me I can't see to get a clear view from above either. I disconnected the MAF sensor duct and moved it aside but that didn't help much. It's ridiculously tight in there and I can hardly even get my hand down to "feel" for moisture.

So, does anyone have a picture from a 98 V70? How did you get to the turbo coolant hoses? This thread was for a 98 S70 so I thought they woulb be the same, but it doesn't look like mine...
Maybe I just need to go under and look again, but I looked for a long time and just ended up with a sore neck and wicked dirty hands.

So I had to go in our other Volvo (an XC90) and am now spending my Thanksgiving pondering the issue with the V70. Thanks in advance for additional specific info. and Happy Thanksgiving!

[mecheng]

That rubber pipe with the clamp in your picture should be it. Hammer on the clamp to twist it around. I posted a few tips.

[songzunhuang]

Hey, thanks mecheng. I got a little better picture here by sticking my iPhone up into the area. It looks like the hose is bulging, but I still don't see coolant coming from it. From all the posts, I'm guessing a replacement for this hose is way overdue since I have 228K miles on the car, but I sure hope it actually fixes my leak!



In any case, all comments welcome. I'll keep gathering data before attacking all the hoses in this area. I really only want to do this once.

[cn90]

...so, does anyone have a picture from a 98 V70? How did you get to the turbo coolant hoses? This thread was for a 98 S70 so I thought they would be the same, but it doesn't look like mine......

You are lucky this happens at home. Imagine this happens half-way through the trip!

* 1998 V70 vs S70, same setup. Just look carefully, it is the same.
* AWD version is more difficult than FWD version, discussed somewhere in this thread.

[songzunhuang]

Oh trust me. I know I have one more thing to be thankful for this year!

[tryingbe]

Get the dealer's hose or the IPD hose if you can wait.

http://www.ipdusa.com/products/10084/12 ... -kit-black