I've bought a pair of cam covers and there appears to be some damage around one of the counter sunk holes for one of the bolts used to fasten it down.

I'll post a picture of the damage later but essentially it looks a bit like someone has drilled a bolt out and gone off the side a little bit and gone through the counter sunk flat area that the washer would sit on.

I've bought these to replace a pair which are leaking around the bolt holes so this is a cause for concern. What exactly prevents the oil from coming out past the bolts? Is there a seal beneath the head of the bolt/washer or can the oil not travel up the shank of the bolt at all due to it sealing lower down?

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61k miles Ph.1 Diablo '6 Project Thread

Yep, new gasket should sort it.

I was totally wrong then.

You could use dowty washer under the bolts?

yes, a 6mm dowty washer would do the trick, these are some on the short bolts on my head.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

As suggested you shouldn't need dowty washers or O rings.

It may be a problem with the PCV system/excessive blow by causing pressure, forcing the oil out.

It would be worth checking the breather plate in the inlet cam cover isn't blocked, and make sure all PCV hoses are clear

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Contact Details:

rich@lynxpowerengineering.co.uk
07732 822546