decode my 6 cylinder engine - The 1947 - Present Chevrolet & GMC Truck Message Board Network

theo goebel · 08-07-2002, 11:50 PM

It is a post emissions engine with HEI and is said to be a 292? The number on the block is FO430TAJ. The mortec site only covers V-8s. Any ideas on where to go?

**GMCPaul** · 08-08-2002, 04:13 AM

My books show TAJ used on 1973 250CI inline 6 cylinder. The 292ci motor has staggered motor mounts where as 250CI motors the motor mounts are straight across from each other. The 250 valve side covers are approx. 4" high compared to the 292 having 6" covers on the side.
GMCPaul

JJR · 08-08-2002, 07:12 AM

Hollanders also shows it could be a 1979 truck 250 with a 2bbl carb.

LeRoy · 08-08-2002, 09:24 PM

Theo, I could be wrong naming it a 292. I based it on the fact that it looked alot different then the 230-250 CID motors that I've dealt with. Differences being the valve cover configuration and having a dual outlet exhaust manifold. It's definetely a newer motor as it has the air injection lines, EGR valve, HEI and other misc. smog equipment. The motor mounts weren't staggered so? Why not use the pressure plate, clutch, flywheel that came with it. This was going to be a temp. motor anyways until the V8 conversion, right? I can vouch for the clutch working well and not slipping if that's what your worried about. Send me a PM if you have anymore concerns

JHickson6 · 08-08-2002, 09:40 PM

I just went threw that same question, mine is a 250 and fellow board members deciphered.

See http://67-72chevytrucks.com/vboard/s...threadid=20220

08-07-2002, 11:50 PM	#1
theo goebel Registered User Join Date: Feb 2002 Location: Seattle, WA USA 98168 Posts: 70	decode my 6 cylinder engine It is a post emissions engine with HEI and is said to be a 292? The number on the block is FO430TAJ. The mortec site only covers V-8s. Any ideas on where to go? __________________ StepSideRideRequired

08-08-2002, 04:13 AM	#2
GMCPaul Senior Member Join Date: Mar 2000 Location: Rockville,In. USA Posts: 3,722	My books show TAJ used on 1973 250CI inline 6 cylinder. The 292ci motor has staggered motor mounts where as 250CI motors the motor mounts are straight across from each other. The 250 valve side covers are approx. 4" high compared to the 292 having 6" covers on the side. GMCPaul __________________ Secure Online Catalog for-GMCPauls Truck Parts Email- GMCPAULS@GMAIL.COM

08-08-2002, 07:12 AM	#3
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	Hollanders also shows it could be a 1979 truck 250 with a 2bbl carb. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

08-08-2002, 09:24 PM	#4
LeRoy Registered truck nut Join Date: Dec 1999 Location: Mt. Vernon, Washington, USA Posts: 1,584	Theo, I could be wrong naming it a 292. I based it on the fact that it looked alot different then the 230-250 CID motors that I've dealt with. Differences being the valve cover configuration and having a dual outlet exhaust manifold. It's definetely a newer motor as it has the air injection lines, EGR valve, HEI and other misc. smog equipment. The motor mounts weren't staggered so? Why not use the pressure plate, clutch, flywheel that came with it. This was going to be a temp. motor anyways until the V8 conversion, right? I can vouch for the clutch working well and not slipping if that's what your worried about. Send me a PM if you have anymore concerns __________________ MOUNT VERNON, WASH. STATE Need a part? Just PM me

08-08-2002, 09:40 PM	#5
JHickson6 I Love This Stuff! Join Date: May 2002 Location: Winnipeg, Manitoba, Canada Posts: 739	I just went threw that same question, mine is a 250 and fellow board members deciphered. See http://67-72chevytrucks.com/vboard/s...threadid=20220 Attached Images __________________ My Rides 1967 C10 In Pieces for now 1985 Ford B700 SourPuss Bus - BIG BLUE 2003 Silverado CITY WORKER YELLOW!!

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