Hi folks,

While waiting for the new exhaust manifold, I am taking the opportunity to do additional maintenance in areas that now became easier to access, like the oil cooler, which from time to time drips a drop of oil from its seal.

I would like to know the sequence I have to follow in order to disconnect the adapter from the oil cooler.

Since I have already removed the coolant before removing the turbocharger and the exhaust manifold, I do not expect to see a lot of spillage when I disconnect the rubber hoses.

Should I start to drain the remaining coolant through the drain valve?

Unless it is strictly necessary, I would avoid to remove the adapter from the block, there is no leak there, I only would like to replace the seal between the adapter and the oil cooler.

To sum up, here is what I would do:

1) Drain the remaining coolant using the drain valve
2) Remove both rubber hoses
*The longer hose on top, connected to the red pipe, is it also for cooling?
3) Remove the oil cooler from the adapter
* How are they connected together? Do I simply have to undo the nipple?

Please see pictures to have a better idea on where I am at this point.





Thank you!
Alex

Dear Metallo,

I too was hesitant to comment as I have no experience for turbo cars. This should be add-on to what Spook commented. Anyway these are what I gathered from internet.





The oil cooler is #9
The gasket is #5 - round gasket with square cross-section (part #3547188)
The big hex nut is #8 (to which Spook referred as the nipple, ditto in Volvo parts catalog)
Sorry I don't know what size(mm) is the big hex nut or what's the torque value.


Amarin.

Thank you all,

Nice image, I could not find one myself.
I do have VIDA with the drawings you showed, so that is no issue.

I am waiting for the parts to arrive, which takes so long during this sad time we are all going through.

I will come back with more details once I have done the job.

Thank you!
Alex

Dear Metallo,

Hope you're well. I stood aside, hoping that someone - who has worked on turbo-equipped engines - would reply.

In their absence, I note that the hose - attached to the orange pipe - is a heater hose. If the heater hoses (there's another one, on the other side of the head) are of uncertain age, you should replace them. If a heater hose bursts, all coolant will be lost in a minute or so. Unless the engine is at once shut-down, a head-gasket replacement may be needed.

The following comments are based on the parts diagram shown in Volvo VADIS, a superseded dealer parts/service database. I've never worked on a turbo-equipped engine.

The nipple - on to which the oil filter is mounted - needs to be removed, to remove the oil cooler. That will allow you to replace the gasket, between the cooler and the adapter.

I recall posts that suggested oil cooler hoses often are softened by oil drips during oil changes. You might want to replace those hoses, which - once everything is back together - are hard to access.

Hope this helps.

Yours faithfully,

Spook

Hi gang,

Is there anybody who could confirm or prove me wrong on my procedure?

I think it is correct, but I want to be sure before messing up things :)

Thank you!
Alex