Scotiawhiskers
Well-Known Member
That was one of my thoughts - carbon build up holding the exhausts off the seats would give zero compression. Obviously burning something but not well / cleanly.
Engine is smooth throughout so hopefully nothing dire to liners / rings / pistons. I might lift the cover that side and try cranking over by hand, see what the rockers are doing.
Oil was filthy when we got it, obviously not been done in far too long (or badly contaminated by this exact issue), wondering if that could jam the lifters and leave the valve off the seat otherwise.
Seen a full top end kit (except collets) from RPI for £165 - I've got a valve spring compressor so it might be adding that to the mix too. I read in RAVE the later exhaust vales had a different stem profile to reduce carbon buildup, but don't know when they changed. Otto is a 1996 build - probably about Feb - May from the dates on the plastics where we have found date stamps.
Engine is smooth throughout so hopefully nothing dire to liners / rings / pistons. I might lift the cover that side and try cranking over by hand, see what the rockers are doing.
Oil was filthy when we got it, obviously not been done in far too long (or badly contaminated by this exact issue), wondering if that could jam the lifters and leave the valve off the seat otherwise.
Seen a full top end kit (except collets) from RPI for £165 - I've got a valve spring compressor so it might be adding that to the mix too. I read in RAVE the later exhaust vales had a different stem profile to reduce carbon buildup, but don't know when they changed. Otto is a 1996 build - probably about Feb - May from the dates on the plastics where we have found date stamps.