how do I identify my hot air block

[crashedout1]

Can anyone tell me how I can verify this block car has 96k on the clock but these cylinders are standard bore and don't have a ridge maybe the engine was replaced any info is appreciated

 

[Jerryl]

A picture of the block displaying lifter valley and casting PN would be a good start to help identify.

Try this link. Hope this helps.
http://www.gnttype.org/techarea/pictureguides/blocks/blockguide.html

 

[crashedout1]

OK so the number is 25514290 which comes out to be a 1979 turbo block what's it doing in a 84 must be a low mile block

 

[crashedout1]

The heads are25518445 which are 1984 and many other years

 

[jiho2]

OK so the number is 25514290 which comes out to be a 1979 turbo block what's it doing in a 84 must be a low mile block

No, the info there is very wrong, that's the correct block all the way through early '85 (with 14-bolt oil pan).

Check the VIN stamped on the block (on an edge just rearward of your casting number) and compare with the last part of the vehicle VIN.

 

[crashedout1]

I also noticed that there's a number stamped on the front of the engine I can only see the first 3 digits because the rest of the numbers are under the timing cover I will look for that other number so the information on gnttype.org is wrong?

 

[crashedout1]

OK I got another block which has all the hot air stuff 25514140 what's this one?

 

[Squid4life]

4140 is what was in my 85 GN. 20 bolt oil pan, not a 14 bolt like earlier ones.

 

[crashedout1]

So its a true turbo block also?

 

[Squid4life]

Yessir.

 

[jiho2]

so the information on gnttype.org is wrong?

It's "wrong" if it had you convinced that your block must be a '79. The '79 had the knock sensor on the intake manifold. Buick moved the knock sensor to the back of the block when they went to an aluminum intake manifold, so your block can't be a '79. And you have the right casting number for an '84.

So why did you get another motor? Sounds like yours is in excellent shape.

 

[crashedout1]

I needed the wiring harness ignition transmission and other misc stuff got the whole thing turbo to transmission for $700 and it runs

 

[BRAD_PADGETT]

So its a true turbo block also?

OK I got another block which has all the hot air stuff 25514140 what's this one?

This block is from a 1985 non-turbo Buick. The correct block for a turbo car in 85 is 2552329. There are no difference between the two blocks whatsoever. My old GN had the block and the engine worked perfectly. You see the 140 blocks a lot simply because the made more of them.

 

[Wahoo]

This block is from a 1985 non-turbo Buick. The correct block for a turbo car in 85 is 2552329. There are no difference between the two blocks whatsoever. My old GN had the block and the engine worked perfectly. You see the 140 blocks a lot simply because the made more of them.

Im pretty sure my car has a 109 block and its an 85, does that mean its not original? Its a hot air.

 

[jiho2]

One more time: To find out if the block in your car is original to it, compare the VIN stamped on the block to the last part of the car's VIN. The VIN is stamped on the block on a flat edge just above "3.8L", and just rearward of the casting (part) number. The block VIN starts with a "4" which means Buick Division; discard that "4" and compare the rest to the last part of the car's VIN.

(VIN = Vehicle Identification Number.)

 

[jiho2]

Page in the '84 shop manual:

 

[jiho2]

The correct block for a turbo car in 85 is 2552329.

That's not even the correct number of digits.

 

[crashedout1]

This block is from a 1985 non-turbo Buick. The correct block for a turbo car in 85 is 2552329. There are no difference between the two blocks whatsoever. My old GN had the block and the engine worked perfectly. You see the 140 blocks a lot simply because the made more of them.

That's not even the correct number of digits.

I really appreciate the help I'm trying to get this car back together

 

[jiho2]

No problem.

The original question was how to verify a block, thinking maybe it had been replaced. The VIN is how you do that.

 

[turbonut85]

Lots of misinformation. The 140 blocks WERE turbo blocks in 85. My original numbers matching hot air block is a 140 block....WITH the matching VIN stamped on it.