'91 9C1 rebuild.....

corning_d3 · #1 08-22-2006, 01:00 AM

So I call Summit today to order a master rebuild kit with forged pistons and stage II summit rods and they tell me they don't have a kit for my boat. They mentioned something about a .167" shallow oil groove. Why can't I order any pistons for this thing!?!?

'91 B-body LO5 5.7, BTW

capriceowns · #2 08-22-2006, 10:48 AM

Have you tried going to sepreate compaines and ordering indiviudal parts and making your own master rebuild?

with so many 350's out there I would have figured they would have the parts flowing out their ass.

corning_d3 · #3 08-22-2006, 01:08 PM

I think the Summit dude I talked to was a moron, at least I hope he's not right. I thought about buying seperate pieces, but It'll cost so much it wouldn't be feasable..

HLandin · #4 08-22-2006, 06:52 PM

I know that Rock Auto allows you to buy a complete long block or the individual parts (such as pistons), but I don't know if that is what your looking for. Just check around, and I'm sure you will.

corning_d3 · #5 08-22-2006, 09:51 PM

Well, called Summit back, got an explanation.. The Oil ring groove is shallower on the 9C1 350 than any other 350. There is a kit for pickups 87-92 with the shallow groove, but it will not work with the police engine, and they aren't going to make a kit for the car..Dammit! So I call GM, they say sorry no parts are being made anymore...I didn't think I'd ever see the day when you couldn't rebuild a small block 350. GM and Summit and Jegs suggested getting custom pistons made, YEAH RIGHT! So anyone need a rock solid 700R4 and 8.5" LSD rear-end before I call the salvage yard n tell 'em to come get this worthless pile of bowtie...May she rest in peace.

1968 Pontiac · #6 08-23-2006, 09:33 PM

I think I missed something; the new rings and pistons won't fit your cylinder bore because the current pistons have a shallow oil ring? Shouldn't make any difference in my mind. BTW, where can the car be picked up? :-)

corning_d3 · #7 08-23-2006, 11:11 PM

I'm not exactly sure why it won't work, but summit said they tried it before and it bit them in the arse. I'm still not sure why if I was using new pistons, but....The car can be got in North East Arkansas. It's a shame since I just put $1400 in parts alone into the transmission, and the rearend has a 3 year old factory GM ring and pinion in it. I did all the bearings and LSD when I installed 'em...

silicon212 · #8 08-23-2006, 11:23 PM

Quote:

Originally Posted by corning_d3

Well, called Summit back, got an explanation.. The Oil ring groove is shallower on the 9C1 350 than any other 350. There is a kit for pickups 87-92 with the shallow groove, but it will not work with the police engine, and they aren't going to make a kit for the car..Dammit! So I call GM, they say sorry no parts are being made anymore...I didn't think I'd ever see the day when you couldn't rebuild a small block 350. GM and Summit and Jegs suggested getting custom pistons made, YEAH RIGHT! So anyone need a rock solid 700R4 and 8.5" LSD rear-end before I call the salvage yard n tell 'em to come get this worthless pile of bowtie...May she rest in peace.

Why not just run stock pistons in it then? Or go with a nice set of Keith Black hypereutectics - those work well - at least in my engine with 262k on them they do.

There's no way that a stock piston WON'T fit that engine - the block is the same regardless of what it's used in (with the exception of #bolts on main caps).

However, if you really don't want the hassle, I'll take the transmission.

corning_d3 · #9 08-23-2006, 11:31 PM

Well, $600-$700 was all I was going to spend on it, and since my dream got shot to hell, I started daydreaming about my Monte again..so my funds are "shifting". If ya want the trans, ya gotta pull it. I've helped you already by killing the millions of super-hybrid yellow jacket/red wasps. Never seen a red wasp with a yellow belly. Don't let the color fool ya, them puppies was BAD! BTW, is the 9C1 LO5 a 2 or 4 bolt?

corning_d3 · #10 08-23-2006, 11:34 PM

BTW, you come get the whole car, I'll throw in a pre-90(?) s/b 350, no heads or intake, that started smoking, so it was pulled. I can get the casting #'s off it tomorrow...

silicon212 · #11 08-23-2006, 11:53 PM

Quote:

Originally Posted by corning_d3

BTW, you come get the whole car, I'll throw in a pre-90(?) s/b 350, no heads or intake, that started smoking, so it was pulled. I can get the casting #'s off it tomorrow...

Unfortunately I'm in Arizona and I can't afford the trip to AR in either cash or time (although I've always wanted to visit that state and it would be cool to blow this place for a week or so) ...

What year Monte Carlo?

The passenger car L05 is a 2-bolt.

That 350 block - is it a one or two piece rear seal block?

corning_d3 · #12 08-23-2006, 11:56 PM

Ah, Arkansas' a nice place, but the mosquitos and humidity make it rough... The Monte's a '96....No one wanted the poor girl, so I gave it a home..

silicon212 · #13 08-24-2006, 12:08 AM

Quote:

Originally Posted by corning_d3

Ah, Arkansas' a nice place, but the mosquitos and humidity make it rough... The Monte's a '96....No one wanted the poor girl, so I gave it a home..

Ah, what's in your sig. You have the Northstar V8 in it?

corning_d3 · #14 08-24-2006, 12:13 AM

I bought a '93 Caddy w/ the 4.6 in it, but I never had time to swap it in(I'm a mechanic), so I sold it 'n' now I'm waiting on the supercharged 4.4 Caddy engine. Somewhere around 500hp and 500ft lbs of torque.. awesome...

corning_d3 · #15 08-24-2006, 01:58 PM

I figured it out! Apparently, according to GM, the '91(not sure about others) 9C1 350 uses corvette pistons. Some camaro's used them also. They shot me a price of $100 each! OUCH!!! And to the best of his knowledge, the wristpin is located in a different spot than on a stock 350 which would raise or lower the piston in the bore. So I may not be able to fix it, but at least I know why now. Anyone need a good '91 9C1 with a rod knock? LOL

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