Replacement engine ID ?

[Swampwing]

I am fairly new to the 6.5 but have replaced several other brand engines over the years.

I have looked at several posts and have not had much luck with my questions. I understand my issues are not all truck related but they still apply.

I am working on replacing a 2000 GM marine 6.5 turbo diesel that broke a valve and then proceeded to eat the #8 piston and then the turbo. A "buddy" at our local parts house got me a rebuilt long block for a good price from Eagle Engine sales that is supposed to be a direct replacement. While he had good intentions I really want to make sure before blowing up the replacement.

The engine that he delivered does not say GM on it and has the International diamond cast into the block in the valley. The block number is 12555506 and the heads are 10137567. There appears to be a date of 051098 stamped into the front of the block. Everything (waterpump, injector pump, plumbing, injectors, exhaust manifolds, oil filtration system and brackets) from the old engine bolted onto the new one except the intake manifold. The new engine has bolts that are vertical instead of perpendicular to the heads.

The cooling system is self contained so only clean antifreeze / coolant will touch the engine. It is not "marinized" with special water jackets or anything.

Questions:

1) Is this a "correct" longblock if the company stated it can be used for a marine application but it has a shorter warranty.

2) What would this engine have been used in? Could it be considered a Ford 6.9 engine?

3) Does anyone know what model truck I need to specify to locate the correct intake and source for one, new or used?

4) It appears the replacement has a cast crank in it. Do all GM diesels have cast cranks or do some have steel? Is one really better than the other for this application?

5) Someone told me the compression ratio may be too high if it is a truck engine. If I install a boost gauge on it, what would a safe max pressure be?

I already had the injector pump rebuilt, rebuilt the turbo and got everything ready to drop in. It is too late to return it so if possible I would rather run it conservatively than deal with trying to resell everything.

Any words of wisdom (other than I'm screwed hopefully) would be appreciated.

[firetruck]

It could be an engine from a van. They have different heads and intakes than trucks. If you wanted to stay on the cheap you could just slap a van intake on it and let'r go. As for safe operating boost pressure I think Walt reccomends about 17-18 as max with no intercooler.

[Swampwing]

Forgot to mention this engine does have an intercooler as well. I know an intercooler is a good thing for a more dense/cooler charge but is it a bad thing for creating too much boost?

I walked around 3 salvage yards in the area looking at all the GM and Ford engines, truck and van. Unfortunately, none of them had a 6.5 in them and only 2 had a 6.2 which looked like a differant intake as well.

[Chevylover]

Pictures could help a lot.

Intercooler ? Great ! The only thing an intercooler does, is to cool down the intake air after the turbo. Cooler air -> carry more oxygen -> more oxygen, more fuel -> better combustion -> more power.

But an intercooler does not more boost or anything else.


Cu,
Sven

[Swampwing]

As requested.

intake bolt differance. The water housing bolts are like the old GM 6.5
http://myfiero.com/uploads/11294_.jpg

The 2 small holes are open ports on this engine, on the GM block they are cast closed.

http://myfiero.com/uploads/11295_.jpg

Here is the valley casting with the H symbol

http://myfiero.com/uploads/11296_.jpg

Big picture. All the GM parts fit fine.

http://myfiero.com/uploads/11299_.jpg

[Swampwing]

It appears this is an odd ball engine. Even the local dealer never heard of differant intakes.

I have had the same luck finding information on this engine everywhere else as I have here, so the owner decided to scrap the idea and upgrade to a Cummins. I have not been able to find an intake anywhere for it and some people think I don't know what I am talking about when I describe the intake bolt differance you can clearly see in the photos.

Since it is too late to return it to the store. If anyone wants a replacement engine send me a note and an offer. I will probably auction it as it sets with the rebuilt pump, marine injectors matched to pump, new turbo etc, but will separate for decent offer. Engine is located in South Florida and I can deliver it depending on how far and the offer.

I am sure the short block is interchangable if someone wanted to use their heads as the casting number is a GM number. I even thought about redrilling the intake but I prefer not to do things like that.

[BNTune]

http://www.peninsularengine.com/contact.html
Try this for info on your eng.

[Swampwing]

The boat was originally a Pen diesel.

Since I have not been able to find out much other than the 18:1 pistons are supposed to be "dished" I pulled off 1 head.

I would expect a "dished" piston to be dished around the entire surface and not just like the picture shows. This looks more like valve reliefs that a dished piston. Can anyone identify these pistons and tell me if this is in fact an 18 or 21:1 engine?

The original pistons were totally flat on top, no valve notches. Therefore, it may be possible this is a dished, lower compression, piston
http://myfiero.com/uploads/11686_.jpg http://myfiero.com/uploads/11687_.jpg

[Chevylover]

Looks like an standard piston - I mean original and not 18:1 !
I got one original piston out of my engine (standing in my living room for decoration) and it looks the same.

Cu,
Sven

[Swampwing]

I went ahead and did a home cc test on the head and piston and came up with 21.6:1 compression ratio which is close enough to know it is not near 18:1.

I also found out through more online parts research it is a H1, cab chassis, and bus engine from 92 thru 2005. Now all I need to do is find a new home for it. Glad I checked before putting it in.

Thanks for the info that was offered.

[chrisrappl]

I think that this may be a naturally aspirated 6.5. I think they are called L-57? engines and may have been installed by Workhorse in its P-42 forward control chassis up to 2004 or 2005 when they came out with their new W-42 chassis.