ezwicky
Member
howdy all,
i sent this same message to the airheads email list, but i wanted to post it also here.
i recently bought a '76 R90/6 and among other issues, it has poor compression, at 100psi in the right cylinder and 75psi in the left. i did multiple readings and they were all consistent.
i am comfortable with removing the heads and cylinders and pistons (i
have the clymer's and haynes manuals and am a reasonably competent
instruction-follower) but i do not have the precision tools nor the expertise to
evaluate the condition of the top end components.
is there any way to determine whether it is the heads or the piston rings that are
the cause of the low compression? is there something i could do at the home
garage and be confident?
or would it be more adviseable to send the heads and cylinders and pistons off
to a competent BMW mechanic and leave it to them to determine?
i am in the south-western suburbs of philadelphia, closer to wilmington
DE than PHL. so i am about an hour away from rubber chicken garage,
which i have heard a lot of good things about.
i also head back home to richmond a couple times a year and pass right
by bob's bmw between baltimore and DC. they seem also to have a good reputation.
thanks in advance for your time and advice,
i sent this same message to the airheads email list, but i wanted to post it also here.
i recently bought a '76 R90/6 and among other issues, it has poor compression, at 100psi in the right cylinder and 75psi in the left. i did multiple readings and they were all consistent.
i am comfortable with removing the heads and cylinders and pistons (i
have the clymer's and haynes manuals and am a reasonably competent
instruction-follower) but i do not have the precision tools nor the expertise to
evaluate the condition of the top end components.
is there any way to determine whether it is the heads or the piston rings that are
the cause of the low compression? is there something i could do at the home
garage and be confident?
or would it be more adviseable to send the heads and cylinders and pistons off
to a competent BMW mechanic and leave it to them to determine?
i am in the south-western suburbs of philadelphia, closer to wilmington
DE than PHL. so i am about an hour away from rubber chicken garage,
which i have heard a lot of good things about.
i also head back home to richmond a couple times a year and pass right
by bob's bmw between baltimore and DC. they seem also to have a good reputation.
thanks in advance for your time and advice,