Author Topic: Used stock GN piston wanted for engine rebuild  (Read 10171 times)

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Offline earlbrown

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Re: Used stock GN piston wanted for engine rebuild
« Reply #15 on: January 28 2013, 07:02:04 PM »
it came in today but is different than the ones from my 87 gn

post some pics of the one you're trying to match
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline Steve Wood

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Re: Used stock GN piston wanted for engine rebuild
« Reply #16 on: January 28 2013, 07:11:04 PM »
sounds like yours are not stock, then
Steve Wood

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Offline Just a Six?

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Re: Used stock GN piston wanted for engine rebuild
« Reply #17 on: January 28 2013, 07:23:52 PM »
I'll try to get a pic tomorrow of the other 4 pistons.
I know they are GM & 99% sure they came from that stock longblock project I had bored out to 5 thous over for my CP pistons. Very curious to see what his look like??
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

Offline richmobj

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Re: Used stock GN piston wanted for engine rebuild
« Reply #18 on: January 28 2013, 07:40:48 PM »
I'm trying to attach a pic of what I have.  All of my pistons have a dimple in the center area and no notches on the side like the one you sent.  It's not a big deal, I already have a guy sending me some that should arrive by the end of the week.  The one you sent said made in Canada.  Maybe they are different than the US ones. 

Offline richmobj

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Re: Used stock GN piston wanted for engine rebuild
« Reply #19 on: January 28 2013, 07:43:53 PM »
Here's another picture.  these are actually the ones I am getting from the other guy, but mine are the same.

Offline richmobj

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Re: Used stock GN piston wanted for engine rebuild
« Reply #20 on: January 28 2013, 07:53:29 PM »
Here's the one I received.  Maybe Canada's version?

Offline richmobj

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Re: Used stock GN piston wanted for engine rebuild
« Reply #21 on: January 28 2013, 07:58:22 PM »
a side shot of the one from Canada.  They are actually different in height and weight.  The ring gaps appear to be in the same place though and so does the location of the shaft.

Offline richmobj

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Re: Used stock GN piston wanted for engine rebuild
« Reply #22 on: January 28 2013, 08:15:57 PM »
Here's a shot of my melted one that has caused me to search for a new one.

Offline Steve Wood

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Re: Used stock GN piston wanted for engine rebuild
« Reply #23 on: January 29 2013, 12:02:48 AM »
David's is not a stock GN piston.  I think all were the same no matter where the car came from

Here is the stock piston   http://www.gnttype.org/techarea/pictureguides/pistonguide/38turbopiston.html
Steve Wood

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Offline earlbrown

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Re: Used stock GN piston wanted for engine rebuild
« Reply #24 on: January 29 2013, 03:45:28 AM »
It almost looks like a stock 4.1 piston.

middle of the stack
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline Steve Wood

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Re: Used stock GN piston wanted for engine rebuild
« Reply #25 on: January 29 2013, 11:12:50 AM »
I don't recall what a 4.1 looks like but it does look like those in your pic!
Steve Wood

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A lot of broken parts does not make you a racer; it makes you a slow learner.

Offline earlbrown

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Re: Used stock GN piston wanted for engine rebuild
« Reply #26 on: January 29 2013, 12:00:06 PM »
4.1's are the top two. Federal Mogul hyper on top and stock under it.

Note the hollow cavity under the wrist pin bore.
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline earlbrown

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Re: Used stock GN piston wanted for engine rebuild
« Reply #27 on: January 29 2013, 12:01:16 PM »
4.1's are the top two. Federal Mogul hyper on top and stock under it. (3.8's on the bottom. F-M forged and stock)

Note the hollow cavity under the wrist pin bore.
'87 GN - 4.2L SFI Turbocharged innercooled V6 - Chrome valve covers - supra pump - 14" K&N - 52mm throttlebody - rocker shaft supports -  1/2 intake spacer - TB coolant bypass - 3" ATR exhaust tip - Alum intake pipe - NOS timing cover - chip - relocated charcoal canister - CR42's - stock

Offline Just a Six?

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Re: Used stock GN piston wanted for engine rebuild
« Reply #28 on: January 29 2013, 12:19:51 PM »
WOW?? Dazed & Confused Now!  :icon_eyes:
I had a 4.1 shortblock but it was a separate pile & rods were never removed.
Had a NA but no pistons came with it that I remember?
I'm still pretty sure those came from either of the 2 stock 87 long blocks I used to have??
The pistons are off the rods because I used the rods on JE Pistons.
Then when I did the last build I used new rods so that accounts for the spare rods I have with those pistons.
The pictures prove me wrong but then How did Charles use the one I sent him 1-2 years ago?? Unless he never did but didn't tell me?? I know he had a tight budget back then.
Either way I'm happy you got another one coming.  :cheers:
Maybe one day when I get some interest I'll measure the one I sent.
 
David
87 LTD. Purchased May 88
Doeskin leather, coach lites without Landau Roof, moon roof, carpeted trunk & No Factory Hood Ornament!
The sticker on AC shows a V-8 Carb car. Special order by Mr. Nick Hall VP of GM Canada
Runs 11.50 on 21 lbs with my old style 67 Q Trim & Alchy

 

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