1999 V70T5M reflections on servicing turbo CBV

Post by **abscate** » 14 Jul 2015, 20:26

Yeah I did those. They are nasty putting the manifold back on. Separate thread.

Post by **scot850** » 14 Jul 2015, 23:16

Tried this on the 19T on my 2000 V70R. I couldn't get the top bolt out at all. Can only be done by removing the whole turbo. Standard CBV stayed in place!

Neil.

Post by **abscate** » 15 Jul 2015, 04:07

With the bigger turbo you are totally screwed with the unit in car. I think I would try the water pipe removal before messing with nasty turn bolts though.

Getting to this thing is a big part of the problem. It's a back breaker working over top and back of the engine without a lift.

Post by **abscate** » 15 Jul 2015, 16:53

News of the day. With a refreshed CBV diaphragm and the IPD 16 psi spring, and new clamps on all the turbo hoses, I am hearing the wish..wish...wish of the turbo dumping much clearer when I lift. I don't remember hearing this on this car before

This is also confirmed with the sensation that I have another engine under the hood when the rpms climb above 2500..

Post by **erikv11** » 15 Jul 2015, 17:16

So new diaphragm = improved performance. Yay!

I am curious, can you see damage to the old one if you hold it up to the light? I have seen a few where you could see breaches that way, but I am just curious because I have only seen a few.

Post by **RussB** » 15 Jul 2015, 18:09

Here's my brief write up regarding the replacement of the CBV on my '96. There's a pic of the failed unit as well

https://www.matthewsvolvosite.com/forums ... =1&t=64873

Post by **abscate** » 15 Jul 2015, 19:31

erikv11 wrote:So new diaphragm = improved performance. Yay!

I am curious, can you see damage to the old one if you hold it up to the light? I have seen a few where you could see breaches that way, but I am just curious because I have only seen a few.

I'll check and show some pix.

Russ..thanks for connecting to that earlier thread...good info

Post by **shiloh51933** » 17 Jul 2015, 13:33

I recently had to replace the inlet hose to the turbo coolant line on my '98 v70xc and did the outlet hose as well. While I was at it I bought a turbo inlet coolant hose for our '04 xc70 figuring I'll do that b4 it fails like our '98v70xc. Anyway, I was curious to know what were the symptoms to a failing CBV, performance differences, ect.. I was in that area doing the turbo coolant hose which was a real PITA, so I wanted to know what to look for in a failing CBV. Is the '98v70xc/'04xc70 similar enough to the v70t5 that I should investigate this area?

Post by **abscate** » 12 Aug 2015, 10:27

Link to a previous thread on this with some pictures

https://www.matthewsvolvosite.com/forums ... =1&t=38338

1999 V70T5M reflections on servicing turbo CBV

Re: 1999 V70 T5 M reflections on servicing turbo CBV