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If Pontiac 400 rod journals are 2.2 what are Chevy 400 journals size?
Wiki User
∙ 12y ago
Factory Pontiac rod journals were 2.25 on all 287-455 V8s from 1955-1978 except for the '77-81 265/301. All connecting rods were also 6.625" except for the experimnental 303, and the '77-81 265/301 .
Chevy 400 rod journals were 2.10" and used a 5.565" rod
Wiki User
∙ 12y ago
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What is the difference in the gm engine 400 and 455?
If you mean the difference between the Pontiac 400 and 455....the differences are the bore size, the crank stroke length, and the main bearing journals. All are bigger on the 455. However, there is also a small block Chevy 400....which has nothing the same as the other two. The Pontiac 400 has a bore of 4.12, stroke 3.75 and 3" main journals. The 455 has a bore of 4.151, stroke of 4.21, and 3.25" main journals.
What size crank journals on a Chevy 400?
2.4484-2.4493 Main Bearing Journal Dia.
How do you tell the difference between a Chevy 400 and a Pontiac 400?
Many ways. Pontiac 400 has a cast aluminum timing cover, that mounts the water pump directly on it, Chevy 400 has a stamped steel timing cover, water pump mounts to the block. Pontic 400 has fuel pump on the drivers side, Chevy is on passenger side. Pontiac has a separate valley cover below the intake manifold, Chevy intake IS the valley cover. Pontiac distributor does not go through the intake manifold, Chevy does. Pontiac has 10 head bolts per side, Chevy has 17. Pontiac has long exhaust ports that bend 90 degrees from the side of the cylinder head, Chevy exhaust ports end at the face of the cylinder head. Pontiac spark plugs are above the exhaust manifolds, Chevy is below. Pontiac 400 is physically larger than the small block Chevy 400 also.
What is the difference between a Chevy 400 and a Pontiac 400?
Basicly everything, The Chevy 400 is a member of the small block Chevy engine family and has a great deal of parts interchange with 265-350 chevys. (heads, intakes, distributors, water pumps, exhaust manifolds). The small block Chevy 400 has 4.40" bore spacing, a deck height of 9.025 and 2.65" main journals. The Pontiac 400 is a member of the Pontiac V8 family and has interchangability with Pontiac V8s 287-455. (heads, intakes, waterpumps, distributors, exhaust manifolds). The Pontiac 400 is physically larger with a bore center of 4.62", a deck height of 10.23" and main bearing journals of 3.00". The two engine families however have almost nothing in common, and almost no parts will interchange. The only thing they do have in common is the both share a 4.12 bore and 3.75 stroke. Pistons, crankshafts, and connecting rods, will NOT interchange due to design parameters. Both engines also require a specific transmission bellhousing since they do not share the same bolt pattern.
Will Pontiac 400 manifold fit Chevy 400 engine?
No, I do not think so as they are not the same engine.
Does a Pontiac super turbo 400 transmission have a Chevy bolt pattern?
no
Why did Chevy company's stop making small block 400 engine?
it was a waste of time and money. it was the only small block in its generation that was externally balanced and had different size main and piston journals.
Can a Chevy 400 Sb crank work with a Chevy 350 Sb?
yes, but the main journals will need to be turned down to fit the 350 saddles
What size crank do you use in a Chevy 383?
There are new cranks from the aftermarket for this. Check with Summit, Jeg's, or similar. You can also use a crank from a 400, but the main journals will need to be modified to fit the block. The stroke is 3.75".
Does a Pontiac super turbo 400 trany have a Chevy bolt holes?
No...it will have the bolt pattern of the Pontiac, Cadillac, Olds and Buick. Chevy has a different bolt pattern. There are some transmissions that do have the dual bolt pattern, but I don't think the TH 400 was one of them.
Can a 400 transmission fit 305 engine?
sure, as long as it's a Chevy turbo 400 and not a Buick, Pontiac or olds 400 it will bolt right up.
Will a small block chevy heads fit pontiac 400?
No, no, no. Two totally different motors.
