1941 Chevy Master Deluxe, 216 motor.
We were attempting to mount the flywheel to the crank and one of the bolts snapped when attempting to tighten it down. It snaped at 45 ft pounds. Just looking to see if we did anything wrong in this process before we attempt this again.
- Cleaned everything, bolts surfaces etc.
- Lined up the flywheel and placed bolts in (with the taps behind them) to hold it in place.
- Used a 2x4 to tap the flywheel onto the crank. It seems to need a little persuasion to mount flush on the crank.
- In a star pattern tightened the bolts in 5 ft lb. increments. One of the bolts snapped at 45 ft lb. The manual stated 50 - 65. We were aiming for 60.
The one error I potentially see is that we re-used the old hardware. Normally we have not been doing this but this time we did.
Are these special bolts? I see 6 of them cost about $25 on Chevs of the 40's. The ones they are selling have star washers on them. Do these replace the tabs used on mine?
Currently the boys are attempting to remove the fly wheel and broken bolt and want me to get answers and new parts.
Hilton, New York
1941 Chevrolet Master Deluxe
1987 Monte Carlo LS
2001 Chrysler Sebring Convertible
I don't have your answer but someone will be along who does. I feel for you. A broken bolt can immediately turn a 30 minute job into a 3 day ordeal.
7046 old site posts
Save a life, adopt a senior shelter pet
1938 Master Business Coupe
1953 210 Sedan
The boys where all set to fix it and get the bolt out last night. They worked together got the flywheel back off. Next thing I new one of them came in the house and said Dad its broken flush to the crank, we cleaned up, lets look at it tomorrow. Sometimes the best thing to do is step away and come back later.
Hilton, New York
1941 Chevrolet Master Deluxe
1987 Monte Carlo LS
2001 Chrysler Sebring Convertible
Understand I've not dealt with this exact issue but past experience with similar issues leads me to this possible solution. If the bolts went in fairly easily, they should come back out fairly easily. My first attempt would be to use a small cutting wheel on a Dremel tool to cut a slot in the end of the bolt remnant then try to extract the remainder using a slot head screwdriver.
7046 old site posts
Save a life, adopt a senior shelter pet
1938 Master Business Coupe
1953 210 Sedan
That would be my first approach to the problem as well. 👍
Ole S Olson
Saskatoon, Sask, Canada
1139 old site posts
We have gotten the bolt out of the crank. Yesterday my youngest was determined to get the bolt out. He drilled it and tried several types of extractors. After three hours he gave up for the night. Today I looked at it with him. Watching what he was doing and saw a mistake off the bat. He was drilling with the right bit but no lubricant on it. He burnt up the bit. Changed to a new bit of the same size and was able to drill out the bolt no issue. Then with the screw extractor it came out.
Hilton, New York
1941 Chevrolet Master Deluxe
1987 Monte Carlo LS
2001 Chrysler Sebring Convertible