What is the proper size and length of the harmonic balancer bolt on a 170? I got a 3/4 coarse thread 1.5 inches and it doesn't feel like it's the right size. It's a 66 170. I want to have a crank bolt on it so I can turn the crank if I need to adjust timing and I just feel more secure that there's a bolt there even if it doesn't make a difference.
170 harmonic balancer bolt size
- Thread starter wh23g3g
- Start date
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borrowed from slantsix.org
The crankshaft vibration dampener bolt is 3/4"-16 UNF, 2.3 inches long, with a 1.5 inches minimum length threaded area.
You will also need a thick washer, the washer is 1-15/16" x 1/4".
summitracing.com: part number DCC-5249557AB
Mopar Performance #P5249557AB - Mopar Performance Harmonic Balancer Bolts 3/4-16 x 2.250 inch (underhead)
Or just get one from an old V8.
-hope this helps ,Lawrence
The crankshaft vibration dampener bolt is 3/4"-16 UNF, 2.3 inches long, with a 1.5 inches minimum length threaded area.
You will also need a thick washer, the washer is 1-15/16" x 1/4".
summitracing.com: part number DCC-5249557AB
Mopar Performance #P5249557AB - Mopar Performance Harmonic Balancer Bolts 3/4-16 x 2.250 inch (underhead)
Or just get one from an old V8.
-hope this helps ,Lawrence
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