lostinthought
11-11-2006, 09:42 PM
After hearing a rather loud knock coming from my motor, I assumed it was a wristpin. I promptly started working on it, pulling it apart and have found that my initial guess was wrong. I'm fairly certain it was caused by the #1 cylinder bearing.
Below are some pictures:
This is the bad #1 bearing
http://www.esnips.com/imageable/medium/62a81ede-d14e-477b-b446-07aecc8c1a7b
This is the bad #1 bearing fit
http://www.esnips.com/imageable/medium/70d547c9-a3d2-42c0-a4ff-719c4a2a5423
This is a good #3 bearing (looks the same as #2 and #4)
http://www.esnips.com/imageable/medium/60b7565f-8612-4ea7-8e05-575f28690fef
This is a good #3 bearing fit (again same as #2 and #4)
http://www.esnips.com/imageable/medium/4a924f49-f5f0-49fd-8708-ae6d739295c7
This is the #1 cylinder. As you can see, no pitting, gouging, etc.
http://www.esnips.com/imageable/medium/b7d89464-7ac0-436b-a4bf-304b49bbd7a4
There are no unusual wear marks on any of the pistons, piston rings, wristpins, or connecting rods. To solve the problem, should I replace all the bearings, or just the one that's bad?
Also, some of the bearing compound wore onto the crankshaft (it's the coppery streak to the right of the flash line).
http://www.esnips.com/imageable/medium/065a247c-3d05-45e9-9235-33fb14bb4f61
Am I going to need the crank replaced, or can I just polish/buff/whatever it out?
Finally, I'm thinking about having everything measured, just to make sure there are no other problems. Is that going to be neccesary, or am I just being too cautious? I'd hate to put the bloody thing back together and find out the bearing caused other damage, resulting in either an unfixed issue or issues later on.
-Matthew
Below are some pictures:
This is the bad #1 bearing
http://www.esnips.com/imageable/medium/62a81ede-d14e-477b-b446-07aecc8c1a7b
This is the bad #1 bearing fit
http://www.esnips.com/imageable/medium/70d547c9-a3d2-42c0-a4ff-719c4a2a5423
This is a good #3 bearing (looks the same as #2 and #4)
http://www.esnips.com/imageable/medium/60b7565f-8612-4ea7-8e05-575f28690fef
This is a good #3 bearing fit (again same as #2 and #4)
http://www.esnips.com/imageable/medium/4a924f49-f5f0-49fd-8708-ae6d739295c7
This is the #1 cylinder. As you can see, no pitting, gouging, etc.
http://www.esnips.com/imageable/medium/b7d89464-7ac0-436b-a4bf-304b49bbd7a4
There are no unusual wear marks on any of the pistons, piston rings, wristpins, or connecting rods. To solve the problem, should I replace all the bearings, or just the one that's bad?
Also, some of the bearing compound wore onto the crankshaft (it's the coppery streak to the right of the flash line).
http://www.esnips.com/imageable/medium/065a247c-3d05-45e9-9235-33fb14bb4f61
Am I going to need the crank replaced, or can I just polish/buff/whatever it out?
Finally, I'm thinking about having everything measured, just to make sure there are no other problems. Is that going to be neccesary, or am I just being too cautious? I'd hate to put the bloody thing back together and find out the bearing caused other damage, resulting in either an unfixed issue or issues later on.
-Matthew