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2G 4G63T internals identification help

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clyerly

Probationary Member
2
1
Jun 28, 2025
Crosby, Texas
Hello to all. We recently purchased a 95 Eclipse GST. It was in a non running shape, been sitting since 2015. When we started looking into the car we noticed some things. Car had brand new looking oil. Owned the valve cover and found ARP head studs with the antilock compound still on the bolt heads. That got me looking further. It has Kelford 272 cams. Now I had to pull the oil pan and when we did we found brand new CP pistons with eagle rods. The crank I can't identify and that's what I need help with, trying to figure out if it's a stronger crank.

This engine had been built and was never fired up. It's like someone was building it and then just stored it and forgot about it. We believe it has a 68 mm turbo. We see a manual boost controller under the hood. The injectors are black top Bosch injectors. The car had stand alone engine management but it was removed.

My question is whether or not there is a good way to identify the type of crank. I think we stumbled upon a gold mine. You can visibly tell the engine was purpose built and never ran. Any help or feedback would be great.

We are trying to figure out if it has a stroker crankshaft etc. We have since found that the crank is a 6 bolt crank.
 
Last edited by a moderator:
If you have removed the oil pan, just check the side of cylinder #1 crank counterweight. If it's an aftermarket crank, you should find a logo and part number usually around there. So you can know what crank you have from the part number.
If the crank is OEM or can't find any part number, check how many MM the piston would travel from TDC to BDC (or vice versa), or as you said the piston is CP, look for the part number that is usually found under wrist pin boss. Then you can know what stroke your crank has from the piston part number.
 
DSMPT. Thanks for the feedback here. That's the first places we're looking in the morning. I'll be back with the findings.
Thanks a ton!
 
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