This engine came in a Chevy truck that I bought (obviously not original to the vehicle). Can anyone identify it, or tell me where to look for casting/ID numbers? Also how much would it be worth in parts, if I part it out? Or is this just worthless scrap??

 

Not much. 4A heads tell me its more than likely a late model motor worth scrape value.

 

See if it "says" 403 on the side of the block.

 

I was thinking 5a so 4a will have come on a 403 but still with the windowed mains I would not plan on making any kind of real hp with it. Might be OK for a mild build. Does it turn over at all?

 

4A heads. More than likely a 403. Very large CC heads too. as large if not larger CC than BBO heads.

Casting numbers between the timing cover and manifold will tell us for sure. Anybody could have swapped the heads for 4A

I see point distubtor, and a late 60's Alternator bracket, bypassed heater valve and late 70's blue valve covers. I also see a blocked off EGR port

 

I'm guessing this truck originally came with an Olds diesel. Check the VIN to be sure. If so, I'd be interested in the motor mounts.

 

The numbers in front of the intake are 557265-4B. Can anyone decode them?

 

Google can.

It's a 403.

- Eric

 

But if you do send it to the melting pot first remove the bolt on items. Alternator bracket, pulleys, distributor, oil pan, exhaust manifolds, timing cover, etc... these things will interchange with older engines that are in more demand. Might as well take a half hour to get maybe another $100 more than just scrap metal.

And Joe already has expressed interest in the motor mounts.

 

Thanks guys, for shedding some light on this. What other engines are the bolt-on parts compatible with?

Joe - I don't think I can help with the mounts... This was in a '61 Chevy 4x4 pickup, definitely not a diesel.

 

Most of the bolt on parts will fit 330, 307, 350, 400, 425, 455. The exhaust manifolds will bolt on the big blocks but not flow as well. The oil pan too will bolt up but is slightly different than what was used on the big block. Pretty much the rest will fit on all of the engines listed above. John

 

the crank may be drilled for a stick, I think they all were, its lighter than earlier cranks, someone may want it.

 

Huh? No 403 cranks were drilled for a pilot bushing. That's one of the reasons that all of the 4 speed T/A's came with the Pontiac 400.

And I don't believe that a 403 crank is any lighter than a 350 crank. As a matter of fact is should be a tad heavier due to the added weight needed in the counter weights because of the heavier pistons and rods used.

 

Well randy, the Guy wants to know what to look for. We don't know whose been in that motor last. So the correct awnser would be... Ya most 403s didn't come with a drilled crank. But check if it's drilled, cause ya never know!

 

Actually no 403's came with a drilled crank. AFAIK they only put a stick behind 2 Oldsmobile engines after 1976. The gas 260 and the Diesel 260. And that was a VERY weak 5sp trans.

 

I have two 403 engines and both have a drilled crank for stick shift.

Gene

 

The blocks I have do not have the z-bar pivot ball bung. One could make a bracket off bell housing or hydraulic clutch. I would keep the block. Jmo, Ken

 

If in decent shape throw early 350 heads on it and have fun. Any Olds will be better than any stock sbc in a truck, even a good 307. Those brackets will fit any of SB Olds 260-403. Some including the pulleys, depending on water pump, will work with 400-455 too.

 

Pull the pan and look for SMW

 

I'm a 403 fan. Love those huge bores, great for value unshrouding. Don't worry about webbed mains for street/strip. Mine never overheated. Jmo, Ken

 

I check the two 403 blocks i have, both have the "Z bar" pivot bolt hole.

just saying

Gene

 

403's can be built well. I know, I'm running one! Save the block for someone that wants to run it. The rest is (IMO) junk.

 

Thanks guys, if anyone needs any parts just let me know. I'll hang on to the block for a few months in case anyone wants it, then it will be melted down to make a new Toyota!

 

As for the crank thing,there weren't as many stick shift cars in the later years,but for whatever reason,Oldsmobile started drilling more cranks for the pilot bearing.The smogger engines have always been a good source for stick cranks.All of the 403's that I have owned,came with drilled cranks.Made a nice stick-shift G-body with one too.
The TA's did have the 400 Poncho for the sticks,and the 403 Olds for the autos,but it wasn't because of the crank.

 

call me on selling the moter I have some questions 443-326-5000 steve

 

Ha ha ha
it's the _4B_ block, sir
The SMW 403's "might be" of the 4A block casting ID, remember? Page 12!

If it turns over, use it.
Cam, AL intake, and an HEI
Check that distributor, google the number, sometimes you get lucky and find a rare and valuable one.

The #16 EGR intake is $5 worth of scrap, unless you are an optimistic epay seller, then it's $1more.

http://www.ebay.com/itm/OLDSMOBILE-4...e07e55&vxp=mtr

 

Steve, this thread is from 11/2013. You might see if there is a more recent post if your looking for an engine.