Balancer for gen VI 454

[Fastereddie]

I’m not much help, but I have a GEN five and it does NOT have a mechanical fuel pump provision. That engine supposedly came out of a BLM fire truck that rolled. It had some stuck valves and broke some push rods when I got it. I think I just pulled a good push. Rod measured it and ordered some from Summit. They may have been melling brand if I remember right it’s been a while.

 

[nvrenuf]

With respect to the questions about how GM would have sold those parts; yes to all. A Chevy dealer could have sold individual parts, crate engine assemblies, etc to individuals or builders - money is money!

 

[nvrenuf]

@Fastereddie I can’t remember, do the gen v’s use the smaller bolt count timing cover like the gen vi?

 

[Wes Harden]

Ok those are Peanut port heads, the 156 casting came on my gen vi, but my head had a different valve adjustment system. your picture show gen iv adjustment system.

My gen vi 156 heads, you can see it's just torque down and go rocker bolt, not the stud and nut style. I think you should try a search for gen iv push rods.

 

[Fastereddie]

@Fastereddie I can’t remember, do the gen v’s use the smaller bolt count timing cover like the gen vi?

I don’t remember for sure. It’s been 8 yrs or so since i’ve had my head in there! I wanna say it is the old style metal one though.
These are the only pics I have for some reason.

 

[nvrenuf]

With respect to block identification I was thinking the timing coming was an easy way -

2 pc rear main seal = mark iv
1 pc rear main seal w/ early cover = mark v
1 pc rear main seal w/ 6 bolt timing cover = gen vi

 

[Fastereddie]

With respect to block identification I was thinking the timing coming was an easy way -

2 pc rear main seal = mark iv
1 pc rear main seal w/ early cover = mark v
1 pc rear main seal w/ 6 bolt timing cover = gen vi

I thought I read something about GEN five heads only working on a GEN five because of the cooling ports or something. And GEN six was backwards compatible with Mark four or is that wrong Info?

 

[nvrenuf]

I thought I read something about GEN five heads only working on a GEN five because of the cooling ports or something. And GEN six was backwards compatible with Mark four or is that wrong Info?

That’s my understanding as well. My post above was just referring to the block itself.

I thought the heads were non adjustable valve train for v’s and back to adjustable in vi’s, is that correct?

 

[Fastereddie]

That’s my understanding as well. My post above was just referring to the block itself.

I thought the heads were non adjustable valve train for v’s and back to adjustable in vi’s, is that correct?

I think Wes has gen 6 that is non-adjustable. I think the gen 6 went to roller cam /lifters

 

[Wes Harden]

I do have a roller, and a 6 bolt timing cover

 

[anwat]

I did find this regarding the cooling/gasket situation between V and VI:

 

[anwat]

In the time I've spent trying to figure this out I could have gone ahead and swapped out to the roller cam and been done. I haven't looked for pushrods from a gen iv yet, but that may be the ticket. The whole issue is that I can't find rods the same length as the ones I have, which seem to be doing the job of fully opening the valves. And that photo will keep me from putting mine back in, since that's exactly what I was worried about, one of the balls had a sliver of metal underneath that looked like it might be getting ready to break off. What a frankenstein of an engine, although it seems I'm not the only one.
Gen V and VI share the same balancer, correct? I'm still trying to figure out why my timing marks are so far off....like 45* off. When they say bare block would that come without a crank in it? Maybe I have a different crank and that's the reason the gen vi balancer isn't lining up.

 

[nvrenuf]

A bare block is literally a bare block, no additional parts.

Typically, you’d find sellers offer either a bare block or a “short block assembly” which is a block/crank/rods/pistons/cam/timing set already put together.

 

[Blue85]

What does the 4.25" refer to in that description?

Presumably it's the cylinder bore.

 

[Fastereddie]

In the time I've spent trying to figure this out I could have gone ahead and swapped out to the roller cam and been done. I haven't looked for pushrods from a gen iv yet, but that may be the ticket. The whole issue is that I can't find rods the same length as the ones I have, which seem to be doing the job of fully opening the valves. And that photo will keep me from putting mine back in, since that's exactly what I was worried about, one of the balls had a sliver of metal underneath that looked like it might be getting ready to break off. What a frankenstein of an engine, although it seems I'm not the only one.
Gen V and VI share the same balancer, correct? I'm still trying to figure out why my timing marks are so far off....like 45* off. When they say bare block would that come without a crank in it? Maybe I have a different crank and that's the reason the gen vi balancer isn't lining up.

I’ve seen timing tabs that are around 12 o’clock instead of 3 o’clock on small blocks. I wonder if that’s the case on yours