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the number bolts per main cap on a crankshaft journal cap. a 4 is stronger than a 2

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Q: On an engine what does 2 or 4 bolt mean and what is the difference?
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Is engine 3970044 2 bolt or 4 bolt?

i have a engine with this # and its a 2 bolt main


How do you tell the difference between 2 bolt and 4 bolt?

assuming you mean with the engine intact-code on side of block, code inside glovebox of original vehicle the engine came from.original crank pully will have a marking on it meaning 4 bolt main. not sure what the marking is but its different between 2 and 4 bolt mains.if you mean looking at the block with the heads off the caps holding down the crank have 4 bolts to hold each cap, a 2 bolt main has well...2.


What is the difference between 2 cycle and 2 stroke engine?

There is no difference, they mean the same thing.


Can a 4-bolt main 350 engine fit in an 88 silverado 1500 with a 2 bolt main engine?

No it wil not. You will have to remove the 2 bolt engine out of the truck and then replace it with the 4 bolt engine. 2 engines will not fit in one vehicle silly wrench puller.


Does a 1992 Chevy k1500 pickup have a 2 or 4 bolt main?

If it's the factory engine, then it will be a 2-bolt main engine.


Will a 350 2 bolt Chevy fit a 83 caprice?

Yes, there is no difference in block size between a 2 or a 4 bolt bolt 350 in '83, although depending what was in the car before, say a 6, you may have some engine mounting, trans issues, cooling, bracketing, and of course exhaust, hopefully the "2" bolt is a carburetor engine, and of the earlier 8 cylinder design, not a newer generation engine, or your looking at allot more issues. jr


Will a 1993 Chevy truck engine fit in a 1990 Chevy Truck?

YES. Those 2 engines are the same. NO difference. It is a direct bolt in.


How do tell four bolt main from two bolt main?

To tell if your engine is a 2 bolt main or a 4 bolt main. Turn the engine upside down on an engine stand. Next, count the number of bolts on each main bearing cap. if there are two, then its a 2 bolt main. And if there are4, then its a 4 bolt main. This applies to the three center caps. The front and rear are always 2 bolt.


Does a 1972 350 Ci truck engine have a 2-bolt or 4-bolt main?

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A 1978 Chevy Nova 5.0L 305 engine uses a 2 or 4 bolt?

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Is a 1988 Chevy k1500 with a 350 a 4 bolt or 2 bolt main?

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What is the difference between a 2 bolt main 350 and a 4 bolt main 350 Will a 2 bolt hold 500hp?

The difference between a 2 bolt main and 4 bolt main is how many bolts hold the caps that hold on the crankshaft. (A 2 bolt main has 2 bolts to every cap and the 4 bolt main has 4 bolts to every cap) A 2 bolt main should be able to handle 500hp as long as you don't push it above 5500RPMs.