Mystery Part

[Bruce of MN]

I am ready to install my rebuilt engine into the car and found this part in a box with other project parts. I can't remember what it is and hope it isn't critical.

What is it?

 

[Y-Blockhead]

Looks like the plate that goes on the back of the crank, on the flywheel. Holds the dowel pins in. Flywheel bolts go thru the holes. https://www.snydersantiqueauto.com/product.htm?pid=979072&cat=41664

You will need to remove the flywheel bolts to install.

 

[Richard Knight]

Yup, belongs under the bolts that hold the flywheel on..prevents bolts from chewing into the cast iron flywheel.

 

[Big hammer]

Quick responses and very accurate very critical !

 

[JayJay]

Yes, it’s critical. It establishes proper spacing between the ends of the flywheel bolts and the back of the block, as well as prevents the flywheel dowels from coming out. Good thing you caught it and asked now as installing with the engine in the car is a pain, at the minimum.

 

[Bruce of MN]

Thanks to all.

At least I don't have to take the flywheel off to install the part.

 

[JayJay]

Thanks to all.

At least I don't have to take the flywheel off to install the part.

No, but you do have to take the pressure plate and friction disk off.

 

[Bruce of MN]

No, but you do have to take the pressure plate and friction disk off.

Yep, already all done!

 

[JayJay]

Yep, already all done!

And, since this is something I'd forget, you did rewire the bolt heads, right?

 

[Bob Bidonde]

Y-Blockhead has it right! It is a dowel retainer. This slide should be helpful.

 

[The Master Cylinder]

Bob, I always enjoy your slides but an airline mechanic/inspector may have issues with your this slide. The wire should always be on the side of the bolt head to prevent it from loosening. The wire in the bottom left will not prevent that bolt from loosening.

 

[Bruce of MN]

And, since this is something I'd forget, you did rewire the bolt heads, right?

Yup!

 

[Marshall V. Daut]

I always make a complete connection of that safety wire by twisting the two ends together. What's another two inches of wire to ensure the bolts don't back out? Believe it or not, I have actually come across two engines, whose flywheel-to-crankshaft bolts had been COTTER PINNED instead of safety wired! What good did THAT do??? Morons...
Marshall

 

[katy]

I remember those metal rings on the flathead V-8s using special bolts that didn't require the lockwire.

 

[GPierce]

Here is where that plate is used.

 

[JayJay]

Here is where that plate is used.

That is a lovely job of safety wiring!

 

[GPierce]

That is a lovely job of safety wiring!

Thank you JayJay.
I spent a few years as aircraft mechanic. One of the first ting you learn is safety wiring.

 

[ModelA29]

Look on the bright side. You saved $2.50 since you hadn't lost it.........

 

[Y-Blockhead]

Look on the bright side. You saved $2.50 since you hadn't lost it.........

Yeah, but it would have been a pisser if he had found it after he installed the engine.

 

[Bruce of MN]

Yeah, but it would have been a pisser if he had found it after he installed the engine.

I did that with my motorcycle, but taking it apart was a lot less work than pulling the engine back out to get at the flywheel. This was just another instance of saying to myself, "No special treatment needed for this doohickey, how could I forget it?" I should have put it in the same bag as the bolts.

I have four 7/16 x 1" bolts left over. No such is listed in the page in the red Les Andrews book, so I am perplexed. We'll see!