Buick Crate 3.1 question
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Junior Member
Joined: Feb 2005
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Car: 1990 Pontiac Firebird
Engine: 3.1 V6...
Transmission: 700-R4
Buick Crate 3.1 question
Hey,
I figured this was the forum I could get info about this on. Here's the story.
I have been shopping around for another V6 since I wrecked my other one and I stumbled upon a guy that had a V6 firebird with a Crate 3.1 Engine with 5K miles in it. I want to know how I can tell he replaced the motor or where I could look on the block to see if it is really a crate. It feels like it has more horsepower then my old V6 motor that has 120K on it but I just want to make sure.
Thanks in advance.
By the way the car is a steal at 1300.
I figured this was the forum I could get info about this on. Here's the story.
I have been shopping around for another V6 since I wrecked my other one and I stumbled upon a guy that had a V6 firebird with a Crate 3.1 Engine with 5K miles in it. I want to know how I can tell he replaced the motor or where I could look on the block to see if it is really a crate. It feels like it has more horsepower then my old V6 motor that has 120K on it but I just want to make sure.
Thanks in advance.
By the way the car is a steal at 1300.
Supreme Member
Joined: Jul 2004
Posts: 1,840
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From: Tigard, Oregon
Car: '86 Berlinetta
Engine: 350
Transmission: 700R4
www.mortec.com
it MIGHT have it, I have never used it to get 6 cylinder block numbers before, so I'm not sure. But wouldnt hurt to look.
it MIGHT have it, I have never used it to get 6 cylinder block numbers before, so I'm not sure. But wouldnt hurt to look.
I searched it under there and still couldn't find it. Thanks for trying though. 
Senior Member
Joined: Nov 2001
Posts: 870
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From: Savannah, GA
Car: 3
Engine: inboard
Transmission: underfloor
Well I don't know how "Buick" comes into play here, but......
'82 to '89 V6 thirdgen cars used the 2.8 liter engine in either carburetted ('82-'84) or Muti port injected ('85-'90) versions. From '90-'92, they used the 3.1, which is the same bore with a longer stroke, a bit more torque.
GM makes a crate replacement in a 3.4 liter, it will bolt right in where ever a 2.8 or 3.1 was using the intake, ignition, injectors etc. from the old engine.
It is possible they made a service replacement 3.1 back when the cars were new, and there was one gathering dust in a warehouse some where and he got it, but it's more likely a 3.4 was installed in the car.
The 2.8/3.1/3.4 are all refered to as 60 degree engines, they are a 60* Vee, small block V8's and Buick V6's including the turbo 3.8 liter Buick V6 used in the one year only 1989 Turbo Trans Am are all 90 degree vee engines.
'82 to '89 V6 thirdgen cars used the 2.8 liter engine in either carburetted ('82-'84) or Muti port injected ('85-'90) versions. From '90-'92, they used the 3.1, which is the same bore with a longer stroke, a bit more torque.
GM makes a crate replacement in a 3.4 liter, it will bolt right in where ever a 2.8 or 3.1 was using the intake, ignition, injectors etc. from the old engine.
It is possible they made a service replacement 3.1 back when the cars were new, and there was one gathering dust in a warehouse some where and he got it, but it's more likely a 3.4 was installed in the car.
The 2.8/3.1/3.4 are all refered to as 60 degree engines, they are a 60* Vee, small block V8's and Buick V6's including the turbo 3.8 liter Buick V6 used in the one year only 1989 Turbo Trans Am are all 90 degree vee engines.
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