HT 3.4L Crate Motor vs. 3.4L L32

[Baja Blazer 85]

So for a while, GM Performance Parts made a 3.4L crate motor long block to directly swap into an S10 chassis truck. If you know what I'm talking about, good. Anyways, I have a '85 S10 Blazer with a 2.8L, so I was all like "hell yeah, I'm gonna get this!" Until I found out recently that nobody has that crate motor anymore.

I still want to pursue the 3.4L swap instead of a costly, work intensive, and overpowered V8 swap in my Blazer. What is the difference between the HT 3.4L Crate motor and an L32 motor pulled straight out of a '93-'95 Camaro/Firebird?

I realize that some of these motors have the water pump turning the opposing direction for serpentine belt/FWD applications. Is this something I need to worry about when comparing these two engines?

Thanks in advance.

[geoffinbc]

http://members.shaw.ca/howto/2.8l%20...ine%20swap.htm Check that out first. That should answer all you need to know. If you have any more questions let me know. I have done a ton of swaps.

[Baja Blazer 85]

http://members.shaw.ca/howto/2.8l%20...ine%20swap.htm Check that out first. That should answer all you need to know. If you have any more questions let me know. I have done a ton of swaps.

Thank you so much for posting that. I remember seeing this many many years ago on S10 forum, but I went back and the link was dead. So glad this document still exists.

[Baja Blazer 85]

That document says nothing about using the sequential fuel injection system off the donor Camaro.

If I want to use that entire sequential fuel injection system in the Blazer along with the donor motor, is that possible? I do NOT care to use the old Rochester carb off the 2.8L. Ew.

Thanks again.

[geoffinbc]

That's up to you and I think it is a good decision. EFI will make everything about the swap better. Basically you will be swapping in the Camaro ECM and engine harness. I believe 93 or 94 is the best ECM to use because it is all OBDI. If you have a donor engine all you will need to do it swap the engine mounts over to yours and swap on a 87+ Oil pan and the engine will drop right in. If you have a 4X4 you will need a pickup tube from an Isuzu Rodeo 3.1L which is a large diameter pickup for a 4X4 pan. After the engine is in place then you have lots of wiring to do!

[Baja Blazer 85]

Awesome! Yes, that's what I thought too about the wiring harness and the oil pan.

Does 1995 switch to OBD II? Why wouldn't I want OBD II?
So you're saying I want the Camaro motor mounts, but not the S-10 mounts?

[caffeine]

HT 3.4L Crate Motor vs. 3.4L L32

Use the S-10 mounts, all 93-95 PCMs are OBDI but have to be flash tuned rather than chipped. I can't remember if the 93 PCM has a different part # or not but it doesn't really matter what year it comes from.

If you're just swapping in a stock/mostly stock engine you should only need a single re-flash of the PCM to delete VATS and perhaps EGR, EVAP, etc... whatever you're not using. If you were local I'd do it for free it's very simple.

[geoffinbc]

I thought 95 was the OBD1.5 odd ball ECM. I know the S-10's had it but maybe not the V6 Camaro.

And yes you need to put the mounts from your 2.8L on to the 3.4L to drop it into your truck.

[Baja Blazer 85]

I'm in California so I will be required to keep the EGR/EVAP system intact on the new motor which means I do not want to flash/chip the PCM. In California, engine swaps are legal provided the new engine is from the same year or later, and all emissions controls are intact on the new engine.

Will be getting replacement S-10 mounts anyways. All my chassis rubber components are dried and cracked.

[caffeine]

You still need a reflash to delete VATS and perhaps to adjust it to work with your speedo signal.

[Baja Blazer 85]

As opposed to a later than '95 PCM that would need a chip instead of a reflash?

[caffeine]

No all 93-95 PCMs are essentially the same and are tuned by flashing, not chipping.

[caffeine]

You could run the engine on an OLDER ECM such as a '7730 and tune with chips, however you will no longer have SFI capability (not that it's a deal-breaker though).

[Guest]

You could run the engine on an OLDER ECM such as a '7730 and tune with chips, however you will no longer have SFI capability (not that it's a deal-breaker though).

I think in California this would be a deal breaker. The way I understand it, the engine must have the matching ECM/PCM.

[Baja Blazer 85]

This is true ^