Crankshaft dowel pin
Thread Starter
Melting Slicks
Joined: Dec 2009
Posts: 3,233
Likes: 657
From: Thunder Bay
Crankshaft dowel pin
The crankshaft in the 383 I am replacing has a dowel pin in the crankshaft flange that engages a hole in the flywheel. The Scat crank in the new 427 has the hole for the dowel but no pin. I looked at several of the engines in my collection and some have the pin, some don't. I'm assuming the pin needs to be there, but I can't seem to find a source for the dowel pin. Am I searching for the wrong term? Where can I get a new dowel pin?
Racer
Joined: Nov 2017
Posts: 289
Likes: 32
The crankshaft in the 383 I am replacing has a dowel pin in the crankshaft flange that engages a hole in the flywheel. The Scat crank in the new 427 has the hole for the dowel but no pin. I looked at several of the engines in my collection and some have the pin, some don't. I'm assuming the pin needs to be there, but I can't seem to find a source for the dowel pin. Am I searching for the wrong term? Where can I get a new dowel pin?
You can get one from a crankshaft that is beyond turning. Any automotive machine shop should have several lying around.
Race Director
Joined: Jul 2015
Posts: 13,082
Likes: 3,399
From: SW Florida.
I doubt you could put crank on wrong. The 6 bolts only go in in 1 orientation. Wheel centers on crank hub. Dowel only provides a couple thousandths of left-right orientation. You can punch dowel out of your old crank if you don't wanna run around town for one. Or do without..
Racer
Joined: Nov 2017
Posts: 289
Likes: 32
The crankshaft in the 383 I am replacing has a dowel pin in the crankshaft flange that engages a hole in the flywheel. The Scat crank in the new 427 has the hole for the dowel but no pin. I looked at several of the engines in my collection and some have the pin, some don't. I'm assuming the pin needs to be there, but I can't seem to find a source for the dowel pin. Am I searching for the wrong term? Where can I get a new dowel pin?
Call Scat and see if they want the dowel pin installed. Maybe your crank is balanced for running without the pin and you would upset the balance if you used one.
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Drifting
Joined: Aug 2005
Posts: 1,443
Likes: 65
From: Wauconda IL
While the pin may not be necessary, it does serve a purpose or it wouldn't be there.
I prefer to have it in place to prevent the flywheel from turning on the crank and placing unnecessary side load on the flywheel bolts.
Just the engineer in me- Your mileage may vary.
I prefer to have it in place to prevent the flywheel from turning on the crank and placing unnecessary side load on the flywheel bolts.
Just the engineer in me- Your mileage may vary.
