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[Andy B]

I got pattern in at the moment also. I know the recommnded Vx only advice (not taking in to consideration dBugs current testing) but simply put I refuse to pay what Vx want*





*Note to all reading this goes against the correct advice from OOF at my own risk.

At least it's given you the practice  for when you need to do them again 

[Webby the Bear]

 

[omega3000]

Might be worth me doing a test as well. What o rings did you use?

Imo the o rings genuine or pattern are not thick enough 

No i dont squash them

[dbug]

Might be worth me doing a test as well. What o rings did you use?

Imo the o rings genuine or pattern are not thick enough 

No i dont squash them

Why, if fitted correctly they seal ok

[Marks DTM Calib]

Indeed, they sit proud of the recess they are in and hence squash down just right when clamped.

Any thicker and greater pressure would be required and then you risk stripping the thread in the alloy cam bearing caps.

[omega3000]

Indeed, they sit proud of the recess they are in and hence squash down just right when clamped.

Any thicker and greater pressure would be required and then you risk stripping the thread in the alloy cam bearing caps.

The 2 lots ive replaced have never sat proud so sealing is almost non existent  I put a blob of sealant in each recess 

[dbug]

Fully agree with Marks statement.  You only need an o-ring to sit 20thou (0.5mm) proud to effect a seal under correct torque   If there were the incorrect size why would GM sell them for that job, and why doesn't everyone's cam covers leak after fitting them?

Always used GM standard o-rings, without sealant, without subsequent leakage from the o-rings.

Are you using a pattern o-ring which may be the incorrect size, or made from a rubber incompatible with oil?

[omega3000]

Genuine o rings mate