Date: Fri, 3 Sep 2004 07:20:50 +0000 (UTC) From: "Tomnospamtech" <saabtechnospamnnect.com> Subject: Re: Tightening Cylinder head?
"Richard Sutherland-Smith" <richard.ssnospamr.net.nz> wrote in message news:1e8463e84c.Richardnospamard.ss.clear.net.nz... > Having read some of the recent posts, I went to check the head of my > 1996 9000 Aero. They were not finger tight but were quite easily torqued > up a bit with a torque spanner, and nothing like the force needed to > give them that extra 90 degrees. I usually have to put the jack handle > onto a solid socket to wind that up. > So how do I go about tightening them? Loosen them off a bit, take them > up to torque and then give them the 90 degree treatment? > -- > > Richard Sutherland-Smith > 19 Webb Road, Wanganui 5001, > New Zealand This is a multi post answer. 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.