I put in the my freshly skimmed head at the weekend. I also made very
sure to clean it up really well with razor blades. Did a compression
check and 1,3 & 4 were all in the range 115-125 but No.2 was 83. I think
this may be because of a badly seating valve because when this head was
on the old engine that cylinder had low compression. For the time being
I'll live with this. I guess that I'd have to get the valve seat
machined to sort this? I put all new head studs and nuts in too. 2 of
the new nuts stripped their threads when I was torquing down, they were
also thinner than the nuts that came off.
The most annoying thing was that the threads inside the manifold stripped
so I couldn't tighten it fully to the downpipe and when she started was
blowing loads from here. A PO had already replaced the other 2 studs
with bolts previously so I'm guessing the same thing happened here too.
Unfortunately I can't do the same with this one as there is no space to
get a bolt in (it's the one nearest bulkhead). So annoyingly I need to
get a new manifold. The other annoying thing is that I have moved house
and the car is at my old house 15 miles away so working on her is now
even more awkward.
cheers
John
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