67 350 engine crank journal size - Team Camaro Tech
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post #1 of 9 (permalink) Old Jan 12th, 08, 10:41 AM Thread Starter
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67 350 engine crank journal size

A friend of mine recently acquired a January 67 350 engine. The stamp pad indicates 67 350 powerglide. He noticed that is has a large journal steel crankshaft in it. Were the original '67 350s small or large journal? Also he's looking at getting selling it so he's wondering what it would be worth? TIA
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post #2 of 9 (permalink) Old Jan 12th, 08, 10:55 AM
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Re: 67 350 engine crank journal size

Chevrolet introduced the 350 to the world in the '67 Camaro SS. As the story goes Chevrolet didn't want any mechanical problems with the new engine so they used the large journal.

Every now and then this subject comes up and someone has an orig 350 block that has the small journal and a big argument insues. There have been published documents to support the large journal story, I don't have them to support this though.

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post #3 of 9 (permalink) Old Jan 12th, 08, 11:00 AM
 
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Re: 67 350 engine crank journal size

Let's just put it this way, small jounal '67 350 SS engine cranks, IF they exist are rare as hen's teeth!!

Somebody has posted pic's of what they claim to be stock small jounal '67, 350 SS engine rods somewhere??

I forget, Gary, GOSFAST, over on Team Chevelle?? Sorry, I forget??

Do a search over there first and then search here for more on this if you want to??

pdq67



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post #4 of 9 (permalink) Old Jan 12th, 08, 11:24 AM Thread Starter
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Re: 67 350 engine crank journal size

The interesting part is the block appears to have had clocking notches for the small jounal main bearings and also has the notches for the large journal bearings. They're both on the same side of the block but one is to the front and the other is to the rear.
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post #5 of 9 (permalink) Old Jan 12th, 08, 12:35 PM
 
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Small journal main caps have the notch centered w/ the bolt-hole whereas the medium journal is to one side.

The block can't have a full centered notch if it is a medium jounal block b/c the journal bore size would shorten the heck out of it's depth OR it would be into the bolt-hole in depth.

Can't be right b/c the bearing tangs would have to be staggered across the bore from each other if the bearings were reversed!!

Like I said, SJ at the bolt-holes and medium on one side to the rear.

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post #6 of 9 (permalink) Old Jan 12th, 08, 01:05 PM Thread Starter
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Re: 67 350 engine crank journal size

It looked like the small journal notches were there and then it was machined again for the larger journals. So the small journal notches weren't very deep. The guy who bought it owns a machine shop so he was pointing this out to me. It was in the oven to get cleaned so I didn't geat a real good look at it.
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post #7 of 9 (permalink) Old Jan 12th, 08, 01:12 PM Thread Starter
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Re: 67 350 engine crank journal size

It looked like the main cap in the picture in this post. If you look closely you can see the remanents of the small journal notch. https://www.camaros.net/forums/showth...0+journal+size
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post #8 of 9 (permalink) Old Jan 12th, 08, 02:25 PM Thread Starter
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Re: 67 350 engine crank journal size

Here's a shot of the front main on the post engine and you can see the notches for both bearings. My friends's also looks like this. http://geocities.com/[email protected]/FM_350.jpg
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post #9 of 9 (permalink) Old Jan 12th, 08, 02:36 PM
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Re: 67 350 engine crank journal size

Quote:
Originally Posted by pdq67 View Post
Let's just put it this way, small jounal '67 350 SS engine cranks, IF they exist are rare as hen's teeth!!

Somebody has posted pic's of what they claim to be stock small jounal '67, 350 SS engine rods somewhere??

I forget, Gary, GOSFAST, over on Team Chevelle?? Sorry, I forget??

Do a search over there first and then search here for more on this if you want to??

pdq67
Hi Paul, we still restore 1 or 2 of these per year for a local resto shop!

The crank is definitely a L/J shaft, the same one used in the LT-1's.

The connecting rods are L/J big ends BUT have the S/J rod bolts installed. They also have a "dimple" directly under the pin eye!

The block is a L/J but uses the "cannister" style oil filter with the removeable cartridge!!

The facts above about the oil filter AND the "small" rod bolts (using the 11/32" bolts NOT the 3/8") probably led many to believe the unit was a "S/J" 350". Not so!!

Thanks, Gary in N.Y.

P.S. Here's a shot of the rods at least, I have no photo's handy of the block! The center rod is the '67 350" L/J (small rod nut) Camaro piece!

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