first 360/390 build..

Reply Subscribe

Thread Tools

Search this Thread

Jan 27, 2015 | 04:57 PM

#31

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,499

Likes: 2,811

Not sure how it could have run long enough to cause crank damage, as the engine would not run once the sprocket moved more than 10 or 15 degrees, maybe less, maybe a little more, but certainly not a full or even half turn.

That said, is this the 360 crank? If so, find a 390 crank and move onward and upward....

Jan 28, 2015 | 10:42 PM

#32

alaskan"70"f250

Thread Starter

New User

Joined: Nov 2014

Posts: 13

Likes: 0

that's what I though too.. but I checked it out and if I put the gear on the crank it wobbles it spins freely, with a new key it still wobbles, but with a new gear could this go away?

Jan 28, 2015 | 11:47 PM

#33

85e150

Super Moderator

Joined: Apr 2004

Posts: 34,499

Likes: 2,811

Inspect both parts. If the crank has a groove in it or other visible wear, you are out of luck. If the crank looks good but the sprocket is visibly worn, you could try a new one. Can't expect it to last unless it's solid.

Jan 29, 2015 | 09:10 AM

#34

MIKES 68 F100

Logistics Pro

Joined: Jan 2011

Posts: 4,762

Likes: 54

From: Antelope Valley ,CA

do you have a Micrometer ? measure the crank and compare to a good crank . I have my original 360 on an engine stand in garage .I'll grab a measurement when i get home tonight .

Feb 1, 2015 | 11:17 PM

#35

Fellenz

Senior User

Joined: Nov 2013

Posts: 286

Likes: 0

Quote:

Originally Posted by alaskan"70"f250

just went down to the machine shop to check on my parts. they said that the crank in unuseable because the timing gear on the crank has spun. therefore the crank is slightly smaller where the gear press fits on??? does this sound legimate? can I get an oversized timeing gear? if I need to get a new crank where can I get one cheapish?

I have both 360 and 390 crank cores if you end up needing a new turny stick.