your buddy didn"t clearance the rod bolts and they are hitting the cam lobes. a buddy of mine bought a motor that someone else did had the same problem, # 7 for sure
The block is ground for the rod caps but your saying to check the bolts to see if they are running into clearance issues. This motor was running about 4 years ago fine would this still maybe be an issue (rod bolts)
These are the engine specs that I have: Keith Black flat top pistons 1.65 trickflow roller rockers trickflow twisted wedge heads Edelbrock performer rpm dual plane intake SSI cam 510 lift 490 duration 3800 TCI stall converter TCI streetfighter turbo 400 w/shift kit One pair of custom hedmann headers Holley 750 cfm dual feed carb My buddy says this dynoed out at 450 hp and 480 tq
Yeah that's why I want to take my time and make sure what the problem actually is. I also have a 54 crestline which is my next project but I'm keepin the engine stock 239 y block.
About two months ago, crank broke, #7&8 rods bent, pin on # 7 piston put a hole in the block, rear main cap broke and oil pump broke...............
I'd prolly tear it down these guys are right too much motor to chance it! Gotta protect that investment!
Good news I pulled the heads off and there was some rust at the top of cylinder number 8. I made a mixture of tranny fluid and kerosene and was able to get it clean everything is rotating fine now. However I do have a new question/s about the cylinder head mating surface, I should use a block as long as the head to surface the deck right about 200-250 grit? Also use the same grit and process on the aluminum heads? I have never resurfaced an aluminum head for this. Please let me knoe any info will be helpful.