Re: Gasket expert?
In message <3k58giFst6bhU1@individual.net>, Richard Brookman
> Just a query about head gaskets and what they should look like.
>After dismantling the manifolds looking for a serious air leak causing lousy
>running (tale told in another thread) I decided to bite the bullet and get
>an unleaded head, and give it a good decoke while I was at it. I didn't
>find any cracks or horrors in the manifolds, but the head gasket had a lot
>of black around and between the cylinder holes - oily and/or sooty, but no
>evidence of blow-by or erosion as might be caused by a serious leak. Would
>this be normal? It looks to me as though the head wasn't fully sealing in
>the middle, as if the PO had tightened from the outside in, rather than from
>the inside out. When I did the heads on the V8 last year, the outgoing
>gaskets were pretty clean.
>Also, there are a couple of places on the new head gasket where an oval hole
>about 0.75" long (water passage, I think) has only a tiny round hole in the
>gasket, and one (between 1 and 2) where there is no hole in the gasket at
>all. The previous gasket was identical, so I have gone ahead and fitted it,
>but I just wonder why LR bothered to design large holes for the water to
>pass from block to head, and then fitted a gasket with holes much smaller
>and, in one case, non-existent.
>Anyroadup, the head's back on and she should be back on the road by the
>weekend. Did I mention the head is a Turner Stage 1? Will report on any
>improvement in due course.
All of the above sounds pretty normal. 2.25 head gaskets normally go
between 2 and 3. and that is what has caused your bad running.