Need help identifying an engine

[GTRS Fiero]

What markings does NoMad's engine have?

[GTRS Fiero]

Oh, the minivan blocks may or may not have the coolant bypass hole.

[Fierofool]

I didn't know to look for a bypass. 

Steve, NoMad said the pistons looked to be dished. 

I've been searching for the H5611 stamped into the head of the piston and can't find anything.  I can find H562* with * being a letter of the alphabet.  Sealed Power was the only one listing an H piston.  Mahle were all numeric. 

[Raydar]

I didn't know to look for a bypass. 

Steve, NoMad said the pistons looked to be dished. 

I've been searching for the H5611 stamped into the head of the piston and can't find anything.  I can find H562* with * being a letter of the alphabet.  Sealed Power was the only one listing an H piston.  Mahle were all numeric.

Okay... You've been doing similar searching to what I have. (I'm looking at Rockauto.)
The iron head 3.1 appears to have been used in the Lumina APV through '95. It would have had flat tappet hydraulic lifters. Roller lifters, AFAIK, did not come in ANY iron head V6.   

If you can't measure the stroke, you might try looking for numbers on the crank. That should absolutely narrow things down. (It would settle the 2.8 vs. 3.1 question.)

According to Rockauto, the iron head and aluminum head engines both had dished pistons. The aluminum head engines would have to have a larger/deeper dish, since the chambers were apparently smaller.  Some of the "piston" pictures would tend to back that up, if you want to believe the pictures. 

I'm still thinking this is a 3.1 minivan engine.

[Raydar]

What markings does NoMad's engine have?

I would be curious as to what markings the engine in Scott's "trailer queen" has, since it's also reputed to be a 3.1.

[Fierofool]

I thought Scotts was a bored, stroked and cammed 2.8. 

[Raydar]

I thought Scotts was a bored, stroked and cammed 2.8.

I thought I remembered hearing "3.1", but a stroked 2.8 is a 3.1. (An rebuild/overbore might make it a 3.2.) So that may be all there is to it, other than the cam.

Talking about the blue car, that y'all dragged home.
 

[GTRS Fiero]

What is in NoMad's Fiero?

[scottb]

the crankshaft:



Head casting number:

[TopNotch]

According to my list of GM casting numbers, that head was only used on 2.8 engines. That's based on the first 7 digits. The last digit looks like a "6", and if it is, it's not on my list. But no 3.1 or 3.4 had those first 7 digits in the head casting number. The first 7 digits were in use up to 1989.

[NoMad]

Mine started life as a 3.1. will be able to get a better Idea once I drop it out in the next few weeks.

[Fierofool]

I don't remember what identifiers we saw on yours, but Dave told me it came from a FWD van.  In part because the starter was already on the correct side and in part because of the thicker cylinder walls played into his build plans. 

Pat, do those numbers agree with the Fiero head numbers or are they for another vehicle?  The 2.8 was used at least until 89 but may have had aluminum heads in the late years when used in other cars. 

[Fierofool]

The Fiero compatible heads should end with 579 according to FieroSails interchange parts listing.  I'll have to compare the numbers to what's on the old engine that's being replaced. 

[TopNotch]

Fiero heads are 14054884 for one head, and 14087879 for the other one on my list.

[Fierofool]

But the two heads are identical and interchangeable side to side.  I found a notation that GM would change a casting number slightly during production but not change any specs of the head.