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Been having big problems trying to get my '77 to idle correctly. Saturday I finally had enough! Went out and bought a new carb, new distributor, coil, and timing set. She idles great now! The old chain had so much slop in it that you could almost touch one side to another! Distributor advance weights holes were worn oversize and I think the gear was pretty worn as well. Bigblock was right about the balancer ring slipping, it is about 30 deg. off! No wonder I couldn't get the thing to run set at the correct timing! New balancer is ordered and will be installed by Wednesday. Thanks to all that gave advice! Very, very, very, very......................did I mention, very happy now!
Lars has a nice faq on finding your true TDC and remarking your balancer to compensate for the slipped ring. Something about using a bolt in the #1 cylinder...sounded easy.
i'm wondering the same thing. how do you tell if your balancer ring has slipped? stock timing on mine doesn't seem "right" either.
I put my thumb over the #1 plug hole and turned the engine until I felt compression. Then used a long screwdriver to feel when the piston was at the top of the stroke. Aftermarket balancer covers can be used to prevent the timing mark from slipping (covers have timing marks on them and they are keyed to the crank, also have marks all the way around so there is no need for timing tape). These cost about $25 and look great. I am replacing the balancer because if it is slipping, it may "walk" back and rub a hole in the timing cover.........not good.
I put my thumb over the #1 plug hole and turned the engine until I felt compression. Then used a long screwdriver to feel when the piston was at the top of the stroke. Aftermarket balancer covers can be used to prevent the timing mark from slipping (covers have timing marks on them and they are keyed to the crank, also have marks all the way around so there is no need for timing tape). These cost about $25 and look great. I am replacing the balancer because if it is slipping, it may "walk" back and rub a hole in the timing cover.........not good.
I put my thumb over the #1 plug hole and turned the engine until I felt compression. Then used a long screwdriver to feel when the piston was at the top of the stroke. Aftermarket balancer covers can be used to prevent the timing mark from slipping (covers have timing marks on them and they are keyed to the crank, also have marks all the way around so there is no need for timing tape). These cost about $25 and look great. I am replacing the balancer because if it is slipping, it may "walk" back and rub a hole in the timing cover.........not good.
On my '82, the outer ring had walked back all the way to the timing cover. I noticed it when I went to check the timing, there was no mark! It was "hiding" under the timing chain cover overhang!
I put my thumb over the #1 plug hole and turned the engine until I felt compression. Then used a long screwdriver to feel when the piston was at the top of the stroke. Aftermarket balancer covers can be used to prevent the timing mark from slipping (covers have timing marks on them and they are keyed to the crank, also have marks all the way around so there is no need for timing tape). These cost about $25 and look great. I am replacing the balancer because if it is slipping, it may "walk" back and rub a hole in the timing cover.........not good.
On my '82, the outer ring had walked back all the way to the timing cover. I noticed it when I went to check the timing, there was no mark! It was "hiding" under the timing chain cover overhang!