GM L31 crate engine discontinued? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Kudzupatch · 11-09-2018, 10:31 AM

In another thread someone was told by a Dealer that the L31 crate motor was no longer in production. Just wanted to see if anyone could verify or prove this wrong.

I am planning a swap into my Suburban very soon. I was waiting till I am ready to start the work to keep from it sitting around with the warranty running out sitting on floor. If it is true I guess I will go ahead and order one. But I have my doubts.

GASoline71 · 11-09-2018, 11:03 AM

Summit Racing has them with free shipping...

https://www.summitracing.com/parts/nal-12530283

But I haven't heard squat of GM discontinuing them.

Gary

sweetk30 · 11-09-2018, 12:07 PM

i know gm dropped a tbi repacment engine and subbed in a diffrent part # a bit ago . but i also have not heard the L31 being dropped .

now i did just hear the 6.0ls engine is going bye bye for a newer bigger cid replacement .

**tdangle** · 11-09-2018, 01:47 PM

That is unfortunate if it is no longer in production. That would mean once the supply is sold, it will no longer be available. And the price may go up. I just checked on www.gmperformancemotor.com and it is still listed.

**LostMy65** · 09-08-2019, 01:14 PM

Quote:

Originally Posted by GASoline71

Summit Racing has them with free shipping...

https://www.summitracing.com/parts/nal-12530283

But I haven't heard squat of GM discontinuing them.

Gary

This one is now also out.

geezer#99 · 09-08-2019, 01:57 PM

Jeg’s Still has some.

https://www.jegs.com/i/JEGS/059/0282/10002/-1

b454rat · 09-08-2019, 04:24 PM

https://www.gmperformancemotor.com/parts/12681432.html

95 S_Trucker · 09-08-2019, 09:15 PM

Summit still has them from gm, one has 2 bolt main and the other is 4 bolt main.

https://www.summitracing.com/parts/nal-12681431/

https://www.summitracing.com/parts/nal-12681432/

The one that is discontinued is the factory replacement for 8600 gvw or heavier. The 4 bolt main motor will swap right in without issue (so will the 2 bolt). I believe the only difference is different valve seats on the 8600+ gvw engine.

garyd1961 · 09-08-2019, 10:04 PM

They seem to have changed the part number, wonder why?

Jrainman · 09-09-2019, 10:42 AM

Yes it seems as though the HT 383 E is advertised now by GM as the 96-99 truck replacement crate engine

Tom · 09-09-2019, 03:54 PM

I'm not sure what the worry is, there are only about a million cores to rebuild out there.

garyd1961 · 09-09-2019, 05:05 PM

Quote:

Originally Posted by Tom

I'm not sure what the worry is, there are only about a million cores to rebuild out there.

We are not talking about rebuilt engines though.

11-09-2018, 10:31 AM	#1
Kudzupatch Registered User Join Date: Apr 2013 Location: GUNTERSVILLE Posts: 621	GM L31 crate engine discontinued? In another thread someone was told by a Dealer that the L31 crate motor was no longer in production. Just wanted to see if anyone could verify or prove this wrong. I am planning a swap into my Suburban very soon. I was waiting till I am ready to start the work to keep from it sitting around with the warranty running out sitting on floor. If it is true I guess I will go ahead and order one. But I have my doubts. Last edited by Kudzupatch; 11-09-2018 at 10:45 AM.

11-09-2018, 12:07 PM	#3
sweetk30 Registered User Join Date: May 2012 Location: horseheads,ny rust belt Posts: 2,794	Re: GM L31 crate engine discontinued? i know gm dropped a tbi repacment engine and subbed in a diffrent part # a bit ago . but i also have not heard the L31 being dropped . now i did just hear the 6.0ls engine is going bye bye for a newer bigger cid replacement . __________________ 77-k30lb BIG truck build . 87-k30lb budget beater build . 85-k30lb the plow machine build . 85-c10sb summer fun toy . ----------------------------- HOLLEY SNIPER efi = worst case of p.i.t.a i ever had . EDELBROCK pro flo 4 = best deal going so far . love my setup works great.

11-09-2018, 01:47 PM	#4
tdangle Senior Member Join Date: Mar 2005 Location: Jurupa Valley, Ca Posts: 1,209	Re: GM L31 crate engine discontinued? That is unfortunate if it is no longer in production. That would mean once the supply is sold, it will no longer be available. And the price may go up. I just checked on www.gmperformancemotor.com and it is still listed. __________________ Terry 1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC

09-08-2019, 01:57 PM	#6
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,512	Re: GM L31 crate engine discontinued? Jeg’s Still has some. https://www.jegs.com/i/JEGS/059/0282/10002/-1

09-08-2019, 04:24 PM	#7
b454rat Senior Member Join Date: May 2004 Location: Binghamton, NY Posts: 3,453	Re: GM L31 crate engine discontinued? https://www.gmperformancemotor.com/parts/12681432.html

09-08-2019, 09:15 PM	#8
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: GM L31 crate engine discontinued? Summit still has them from gm, one has 2 bolt main and the other is 4 bolt main. https://www.summitracing.com/parts/nal-12681431/ https://www.summitracing.com/parts/nal-12681432/ The one that is discontinued is the factory replacement for 8600 gvw or heavier. The 4 bolt main motor will swap right in without issue (so will the 2 bolt). I believe the only difference is different valve seats on the 8600+ gvw engine.

09-08-2019, 10:04 PM	#9
garyd1961 Registered User Join Date: May 2016 Location: Henderson NC Posts: 975	Re: GM L31 crate engine discontinued? They seem to have changed the part number, wonder why?

09-09-2019, 10:42 AM	#10
Jrainman Registered User Join Date: Jul 2015 Location: North East PA Posts: 682	Re: GM L31 crate engine discontinued? Yes it seems as though the HT 383 E is advertised now by GM as the 96-99 truck replacement crate engine

09-09-2019, 03:54 PM	#11
Tom driving is in my blood Join Date: Dec 1999 Location: Mesa AZ Posts: 5,692	Re: GM L31 crate engine discontinued? I'm not sure what the worry is, there are only about a million cores to rebuild out there. __________________ -78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me.



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