Date: Fri, 03 Sep 2004 21:31:32 +0100 From: Colin Stamp <colinnospamp.plus.com> Subject: Re: Tightening Cylinder head?
On Fri, 3 Sep 2004 07:20:50 +0000 (UTC), "Tomnospamtech" <saabtechnospamnnect.com> wrote: > Engine cold:You need a 40 torx bit to undo the cam cover or a 12 mm socket >and a E16 torx socket for the head bolts, Do them 1 at a time; loosen and >retorque to 60nm/44ftlb, then 80nm/59ftlb. then 90 degrees. >This is meant to be a preventative measure and not a cure for a blown >gasket, But if done in time can quite possibly save you a fair amount of >money. >Will the cam cover seal leak if reused?, It will or it won`t, but beware the >over use of silicone. >It seems to affect 16 valve engines with balance shafts the most, But I had >a 1990 900 16v turbo the other day with a blown head gasket and the bolts on >that engine were nowhere near tight enough. >HTH Tom, Saabtech. Thanks Tom and Bob, The one thing that concerns me is in doing this to stretch-bolts. Aren't they meant to go past their elastic limit on the first 90 degree yank? Won't doing a second one take them twice as far as they're meant to go? I wouldn't like to snap any... Ah well, I'll check them for obvious looseness and then worry if I find any. Cheers, Colin.