Hi folks,
Has any one else blown up their 3.0 turbo B6304T engine? Bought it 2nd hand 9 mths ago, now at 135,000ks .
A mechanic did compression tests and has said there is no compression in cylinder 1. and the plugs should have been replaced at 120,000 (but the service history all looked good to me)

A mechanic friend is now helping me pull the motor down to see what went wrong to either fix it or replace the motor with a used one from a wrecker.

But our 1st challenge is needing specialty tools to take the heads off and set the cam shaft timing correctly.

Can someone comment on the durability/quality of the T6 motor. Is it worth fixing and what else should we be watching out for?

Thanks,
Geoff

 

generally (with the exception of some of the 2012 S60s which have a known issue with piston rings leading to high oil consumption) white blocks are very durable. I think the question of rebuilding can be best answered with a few other data points. 1) on the compression test was a wet test done to determine if the other cylinders are solid 2) was an inspection cam used to determine if you simply have a burnt valve? Any symptoms prior to #1 going out? ie overheating, oil leaks etc?

 

Hi there,
Thanks heaps for your reply, and sorry for the slow reply back, just been real busy with work etc.
this week I'll get my mechanic out again and share this and will think it over some more.

Cheers

 

Hi Again,

It has been a slow project to pull down my T6 motor but we got there in the end after getting some cheap Chinese copies of the cam timing tools etc.

To determine where it had lost compression my mechanic made his own compression test pipe fittings. He 1st pulled apart 2 used spark plugs and welded 6 inches of pipe to the plug threads so we could blow air down to see/hear where it was leaking to. (very clever I thought)

We quickly found it was leaking out the exhaust valves.The head is now at a cylinder head specialist and we are waiting on ordering parts to re build it all. All the other cylinders have been tested and are fine. The only other feature is that a blob of hardened metal attached itself to the spark plug electrode in cylinder 1. (most likely from the hole in the valve)

We then went ahead and pulled it down and found one exhaust valve with a 2mm chunk out of it. This is very uncommon apparently and not your typical burnt valve.

Any ideas as to what caused this?

So now I'm really hoping somebody out there might know if I have to get genuine Volvo parts or can I source them else where. I was told that even a lot of genuine parts are still manufactured by other companies on behalf of Volvo etc.

This is not a complete list but we will need the following:

At least 1 new valve
14 head bolts
Head gasket
A few O rings for the coolant system
Possibly the camshaft cover gaskets

Does any one know if there are kits vs individual parts?

I'm in Australia and can't find anything in this country. Happy to order from USA if I can save $.

Thanks
GeoffP