4.3L question

[GMfannow]

Is there a difference in the blocks from a syty 4.3 and a s10 4.3 block?

 

[Matt]

Yes

 

[MoJo]

Re: 4.3L question

1991 - 1992 GMC trucks with the RPO ZR9 Syclone Appearance Package, and 1992 - 1993 GMC trucks with the RPO Z79 Typhoon Appearance Package were equipped with the 1988 - 1993 LB4 4.3L S10/S15 engine block, crank, rods and cylinder heads. However, the LB4 engine blocks used in the Syclones and Typhoons were upgraded with 2-bolt nodular iron main caps.

 

[SY2455]

Re: 4.3L question

1991 - 1992 GMC trucks with the RPO ZR9 Syclone Appearance Package, and 1992 - 1993 GMC trucks with the RPO Z79 Typhoon Appearance Package were equipped with the 1987 - 1993 LB4 4.3L engine block, crank, rods and cylinder heads. However, the LB4 engine blocks used in the Syclones and Typhoons were upgraded with 2-bolt nodular iron main caps.

That's a good start, you should complete the list.

 

[MoJo]

Re: 4.3L question

The question was "difference in blocks" and I covered it completely. What did I miss?

 

[GMfannow]

Re: 4.3L question

Thanks mojo!

 

[SY2455]

Re: 4.3L question

The question was "difference in blocks" and I covered it completely. What did I miss?

The Pistons.

 

[STAGEUP]

Re: 4.3L question

So they used the same pistons?

 

[STAGEUP]

Re: 4.3L question

The Pistons.

Beat me to it. Haa.

 

[Poconojoe]

Re: 4.3L question

The Pistons.

He said block, not short block, the pistons would only be included in a short or long block

 

[STAGEUP]

Re: 4.3L question

That's true! Haaa. Hey, its early!

 

[upside]

Re: 4.3L question

so the only difference between all other 4.3l LB4 "bare blocks" from 87-93 is nothing besides the nodular main caps?.

is there any set cast number or part number on those 87-93 LB4 blocks that would identify them for those particular years?

 

[Poconojoe]

Re: 4.3L question

Those blocks are easy to spot, since they use a one piece rear main seal and don't have a countershaft bore and are set up for a roller cam

 

[SY2455]

Re: 4.3L question

If you will search the Vault and read this, you can find just about every answer you are looking for.

the holy grail of 4.3 info!!

 

[SY2455]

Re: 4.3L question

He said block, not short block, the pistons would only be included in a short or long block

Yes HE DID, That being the case WHY did MoJo list the following in His reply? NOOB....

crank, rods and cylinder heads

:rotf::rotf::rotf::rotf::rotf:

 

[midnightbluS10]

Re: 4.3L question

If you will search the Vault and read this, you can find just about every answer you are looking for.

the holy grail of 4.3 info!!

Yes HE DID, That being the case WHY did MoJo list the following in His reply? NOOB....

crank, rods and cylinder heads

:rotf::rotf::rotf::rotf::rotf:

He listed what was standard LB4 parts in a syty and added that the block itself received upgraded caps to accomodate the LB4 block is how I read it. Pistons have no relevance because the aren't LB4 pistons with upgraded pins. They're completely different pistons, hence their ommission from his post.

 

[upside]

Re: 4.3L question

If you will search the Vault and read this, you can find just about every answer you are looking for.

the holy grail of 4.3 info!!

This is what iv'e been looking for, I remember reading this years ago. :tup: