Thread: Other XC90 Problem: - Excessive smoke (inconsistently)
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Old Jul 4th, 2020, 17:25   #9
NMB
Volvo XC90 T6 & XC90 D5
 

Last Online: May 30th, 2024 07:50
Join Date: Jul 2020
Location: Marple
Default Compression test on VIDA

Quote:
Originally Posted by JohnL View Post
You can do a compression test with Vida, without taking the injectors out. Close to where you check the injector volumes same page.
What is the turbo pressure? You can check this with Vida, and drive and record with some load up a hill.
Oil level on this model is critical, make sure its a bit lower than max level, but monitor it, regeneration can increase the level with excess diesel.
You could close off the vacuum feed tubes to front and rear engine mounts and see what happens.
I have done the compression test through VIDA and the following values:

Engine Speed Cylinder 1 - 695
Engine Speed Cylinder 2 - 693
Engine Speed Cylinder 3 - 698
Engine Speed Cylinder 4 - 700
Engine Speed Cylinder 5 - 705

With the values all well within tolerance of 675 - 725 (in fact bang in the middle) I'm thinking that the cylinders as are the rings with the fault trace heading to:

1) Breather system
2) Turbo
3) Valve stem seals

Any comments?
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