Spinning motor by hand - both ways?
Thread Starter
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
My other option is to reverse the tightening sequence on the flywheel bolts, if I swap 3 & 3 and 5 & 6 the number of required flywheel turns reduces from 3 to 1-1/2.
Race Director
Joined: Oct 2002
Posts: 16,477
Likes: 26
From: Gone
CI 6-7-8-9-10 Veteran
St. Jude Donor '03
I've spun mine around by hand both ways (with the heads off - no compression).
Can't think of any reason it would hurt anything, but if there is, I'm curious too.
Can't think of any reason it would hurt anything, but if there is, I'm curious too.
Thread Starter
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I did it with the valve train out when I did the cam, wasn't sure with the non-symetrical cam ramps, etc. I think I may just change the tightening sequence so I can go the same way.
Drifting
Joined: Oct 2004
Posts: 1,384
Likes: 8
From: Southwest Virginia
I agree, won't hurt a thing. Figure most engines, specially high compression ones comes to a pretty harsh stop when you cut them off, they will kick back turning backwards till they equalize the cylinder pressures. Lots of times cranking they will pop back and turn backwards. But just remember, when you spin the car out a 100MPH+ don't let out the clutch while sliding backwards. Spin the motor backwards that fast and those non-symmetrical cam lobes won't do the valve train any good!
Seen it end more than few of the NASCAR's boys days.
Seen it end more than few of the NASCAR's boys days.
