2.4D (2005 on) V70 D5 (D5244T5) Cambelt Split on startup

[Veedubmad]

So I've done a diagnostic using Vida dice and got the following results.
If anyone could give me some pointers on what may be the issue based on these results I would appreciate it ?

See attached pic of results

[cheshired5]

Originally Posted by Veedubmad

So I've done a diagnostic using Vida dice and got the following results.
If anyone could give me some pointers on what may be the issue based on these results I would appreciate it ?

See attached pic of results

As stated in Vida, the correction tolerance is +/- 3mg so those results are near perfect and the best I've seen for a long time.

[Veedubmad]

I'm new to Vida, do these figures suggest the compression is good ?

[cheshired5]

Originally Posted by Veedubmad

I'm new to Vida, do these figures suggest the compression is good ?

You've done a cylinder speed and fuel correction test not a compression test.

If you single click the test option in Vida, it will explain in detail.

[Veedubmad]

Ok thanks will have another go

[Veedubmad]

Well after commencing strip down for further investigation it quickly became apparent as to why it wasn't running very well.....

Looks like the camshaft bearing caps have taken the brunt of the force when piston and valve met with two of the bolts shearing and five of the beating caps snapping.

Would it be a good idea to replace the bearing caps and bolts and see what happens or is it a full head rebuild scenario from here, thought please ?

Thanks

[Clan]

Originally Posted by Veedubmad

Well after commencing strip down for further investigation it quickly became apparent as to why it wasn't running very well.....

Looks like the camshaft bearing caps have taken the brunt of the force when piston and valve met with two of the bolts shearing and five of the beating caps snapping.

Would it be a good idea to replace the bearing caps and bolts and see what happens or is it a full head rebuild scenario from here, thought please ?

Thanks

you will need another whole cylinder head now, caps are not available on their own they are individual to the cylinder head which is quite normal on cylinder heads on most cars , you will probably find that the hydraulic lifters have broken their bores in the head too .
Another thing which can happen is the cam lobes turn a small amount on the cam shaft after the forces which they went through , which results in the engine running roughly and impossible to diagnose anything wrong when you get it running again .

[SteveTDCi]

Be very careful when sourcing a new head, you exhaust cam is the same as the one from an XC90 we have been working on. We have just swapped the engine and the new one has a different profile where the cam sensor picks up the signal. We had to order a new cam as it turns out a follower had failed and worn the lobe off the cam.

[Veedubmad]

Quick update on my Volvo repair (for those that are still taking interest in this thread)

I ended up sourcing some replacement cam bearing caps as 4 out of 6 were broken on the exhaust cam.

Also taking your guys advice and from what ive read on other forums i replaced the exhaust cam to ensure it was right the first time it went back together.!

The result is that the car started up fine without hesitation and runs (purrs) like a healthy D5 should do .

It was a long drawn out investigation but i got there in the end and now have a VERY cheap 08 reg V70 D5 estate which i intend to keep for a good while.

Cant wait to take it for a proper run and enjoy the comfort.

Thanks to all that shared their knowledge and experience in an effort to help resolve my cars issue. Appreciate it.

[Clan]

Originally Posted by Veedubmad

Quick update on my Volvo repair (for those that are still taking interest in this thread)

I ended up sourcing some replacement cam bearing caps as 4 out of 6 were broken on the exhaust cam.

Also taking your guys advice and from what ive read on other forums i replaced the exhaust cam to ensure it was right the first time it went back together.!

The result is that the car started up fine without hesitation and runs (purrs) like a healthy D5 should do .

It was a long drawn out investigation but i got there in the end and now have a VERY cheap 08 reg V70 D5 estate which i intend to keep for a good while.

Cant wait to take it for a proper run and enjoy the comfort.

Thanks to all that shared their knowledge and experience in an effort to help resolve my cars issue. Appreciate it.

where did you get cam bearing caps ? Be wary as they are individual to each cylinder head , they are bored with the caps screwed down so your "Foreign" ones will not have exactly the same centres as the bore in the head , so will only touch on a thin point leading to failure again sooner or later . Still , nothing lost