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Author Topic:   2300 vs. 2500?
jimshar
Dirt Full Roller

Total posts: 67
posted May 23, 2004 04:17 PM  
What is the visible difference between the 2300 and the 2500? I have been told they have the same block, but i need some help in knowing which is which.

speedyd1
Dirt Maniac

Total posts: 170
posted May 23, 2004 05:04 PM  
same bore / same block / 2300 has 5.2" rods with 3.123 stroke / 2500 has 5.4" rods with 3.4" stroke. if memory serves me correctly.2300 has eithor small or large journal crank but 2500 has only small journal so you'll have to put bearing spacers in to use the 2.5 crank in large journal 2.3 block.

jimshar
Dirt Full Roller

Total posts: 67
posted May 24, 2004 06:16 AM  
Thanks for the info. Its sounds like the only way to tell is to open up the motor.
quote:
Originally posted by speedyd1:
same bore / same block / 2300 has 5.2" rods with 3.123 stroke / 2500 has 5.4" rods with 3.4" stroke. if memory serves me correctly.2300 has eithor small or large journal crank but 2500 has only small journal so you'll have to put bearing spacers in to use the 2.5 crank in large journal 2.3 block.


juliaferrell
Dirt Freak

Total posts: 370
posted May 24, 2004 01:17 PM  
2.5's are only in 98 to 00 rangers.

okiepro4
Dirt Full Roller

Total posts: 44
posted May 24, 2004 09:30 PM  
they are not the same block the 2500 has no distributer hole. You have to put the 2500 crank in a 2300 block. speedyd1 is correct on the baring spacers If you use a large journal block. you can tell the small journal blocks from the out side they will have a extra tapped hole abouve where the fuel pump would be. close the the edge.

juliaferrell
Dirt Freak

Total posts: 370
posted May 25, 2004 07:42 AM  
If you have a good caliper you can stick it in the spark plug hole and get to BDC then roll engine and measure the stroke as the piston comes up.


speedyd1
Dirt Maniac

Total posts: 170
posted May 25, 2004 10:28 AM  
the blocks are all the same with the exception of the mechanical fuel pump. all of the late model 2.3 have an electric pump also. therefore they too dont have the hole.
five minutes with a drill bit and a die grinder and the point is mute anyway.put the gasket up as a reference and cut it out.

speedyd1
Dirt Maniac

Total posts: 170
posted May 25, 2004 10:35 AM  
i just pulled a 2.5 engine out of of the pile and it does in fact have a distributer hole. its blocked off with a plug and a standard distributer hold down clamp. ill post photos if necessary.

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