It's a brand new solid lifter Comp custom grind... and the cam pin just falls down into the hole. The pin measured around 0.309", I tried another that measured 0.310", and it fit the hole about perfect... but not a press fit. I tried a 5/16" drill bit (0.312) and it seemed to be a pretty good press fit.

I called Comp, and they said to ship the cam back to them, and about a week after they got it, they would get another one back to me.

I might see if I can find a 5/16" hardened dowel pin tomorrow...

Oh well... This is taking forever.

0.048" off the deck to get the pistons up flush, now this...

I hope your guys luck is better than mine has been. Oh yea, the Boss 302 crank also needed turned again. It's now 0.020" on the mains and 0.030" on the rods.

This would get you back together right away with no adverse effects.
Good luck.

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

quote:

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Originally posted by n2oMike:
0.048" off the deck to get the pistons up flush

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quote:

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Originally posted by Moneymaker:
2) Drill another dowel in the cam and timing gear so it is doubled pinned.

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quote:

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Originally posted by n2oMike:
I might see if I can find a 5/16" hardened dowel pin tomorrow...

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I don't think your gonna readily find a hardened dowel pin....you may have to purchase a 5/16" drill blank if it has to be hardened.

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Conciousness - that annoying time between naps.

http://www.mcmaster.com/

They ship same day, great company to do business with.

What confuses me is, Why did the pins for the cam have the oddball 0.309" and 0.310" measurement? Am I wrong or something? Are the pins really supposed to be 5/16"... which is just a couple thousanths or so bigger? My 5/16" drill bit measured 0.312" The pins that shipped with the cam measured 0.309", while the pin I had (that came with a JUNK Motorsport timing chain) measured 0.310".

Anyway, I'm confused..... The pin is just under 5/16" as far as I can tell, and measures 1-3/8" long, so I'm going to order a standard, a 0.001" over, and a 0.002" over 5/16" pin just to be safe. BTW, 5/16" is actually 0.3125".

They don't have 1-3/8" (stock length), so I'll have to order 1-1/2" and cut it down. It might also need sanded down if the diameter is a tad too large.

What exactly is a good 'press fit' for something measureing 5/16"? How much larger should the pin be than the hole?

I'm getting tired of these hassles... Oh well.

Hope your all's luck is better than mine.

Thanks

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Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator

I had to purchase in quanity. :roll: 20 standard 5/16" 1-3/4" hardened dowel pins for $7, 20 0.001" oversize 1-1/2" long pins for $8, and 5 0.002" oversize 1-1/2" pins for $6. Shipping will be around $5, and they should arrive tomorrow from McMaster.

Stock length is 1-3/8", but they didn't carry pins in that length, so I had to get longer ones. The 1-1/2" long standard 5/16" pins were only available in 50 packs, but the next longer ones came in packs of 20.

Anyone need any dowel pins? I'll have 44 left over.

These were all 130,000 psi pins hardened to 60 on the rockwell scale. Harder 'drill blanks' would have been too brittle. They also had plain steel and stainless, but were not even rated for shear use. The plain steel pins were even called 'shear' pins, and were to be used as a 'fuse' (like a shear pin in a lawnmower... in case it hits something solid)

I'll let you know what happens...

A Cloyes (motorsport) timing chain fit just right, but the machined billet steel timing chain I wanted to use needed a little clearancing to the pin hole.

All that's needed now, is to cut it to length... and the cam is "all better".

Did you choose to do the 'double pinning' work as Alex suggested or not?