it spun a rod bearing only hade 500 miles on it. Told me if I buy new Rods he will cover the rest said the stock rods just won?t handle it That he new better then to recon and reuse the rods for a performance motor even with the ARP bolts. he never told me when he done them the 1st time he never took the pan off just said he would cover it if i pay for the new rods wants me to get the eagle ESP 3d H-Beam rods
He's trying to sell you a set of $500 rods, so he can put them in with a crank that'll cost him $65 to replace. The H-beam rods are nice, but depending on HP output/RPM, they might be overkill. Sounds like he's trying to cover up a mistake he might have made. Reconditioned rods will handle a LOT of power, providing they were done right. I had a set of stockers in one of our bracket engines that spun over 8500 RPM in the waterbox, making around 450 HP (302). A spun rod bearing is caused by lack of oil, a mis-machined rod, mis-machined crank or a bad bearing. Since you had the rods reconditioned, its possible that the machinest got a phone call or something and forgot to finish one rod (seen it MANY, MANY times) and that rod is now toast (or at least the bearing is anyway). Since they never took the pan off, how do they know it's a spun bearing and how does he know what caused it? I'm thinking he knew there was a problem all along, but figured it wasn't bad enough to worry about. Been there, done that....and it always comes back to bite you later on.
thats what i think too ... he knows it was not right he built the motor did all the work and said he would back it up if he put it together cost more money the motor is a 351W forgot that part and should be close to 540 hp at 6500 rpm
I'd replace the stock rods for that kind of power myself. May not be absolutely required, but stock rods are kind of puny. I agree tho, does sound a bit fishy as he's never been into it to see the damage. its been awhile, but seems the safe stock limit was 600hp on a 302? with the additional stroke, seems it would be lower on a 351. Someone else will post, hopefully with detailed explanation, but those are my thoughts.
Some people including hardcore 351w guys say that the size of the bearing on a 351w is the problem with SOME rod and main problems . Sinse the bearing is considerably larger than a lot of engines the claim is the surface "speed " of the rotating bearing surface is much higher which supposably causes premature bearing failure . That said I wouldnt really think this is a problem unless you were turning the engine faster than about 6800 or 7000 rpm. Personally I would tend to go with the majority here and suspect the machine shop screwed up .
Its funny cause he never took the pan off to see the problem before he even seen it and I backed the van to the door to unload it he told me that! He would only cover it if i got new eagle rods that 2 of the stock rods was iffy but came out good he new what the problem was
you've got to look into this further!!!! It sounds like a scam to me, you just CANNOT troubleshoot anything internal in an engine like that without looking first. Sure I would suggest better ones anyway running 540 horse...let us know what happens.
yeah, you'll definetly want to upgrade to better rods @ the power level you're at. Ask me how I know. Stock rods suck plain and simple, especially if you've got any kind of power. I broke one last year...not a rod bolt, the rod itself, where the little bump is on the side (where there used to be an oil hole on the 289 rods) and of course took everything else with it, crank, pistons, block, pan (pan came off without removing all the pan bolts), on and on. I wouldnt wish a broken rod on my worst enemy, but IMO you're asking for trouble if stay with the stockers. Good luck with the machinest, and keep us posted
well getting new eagle rods so he will cover the rest of the repairs spun number 2 and took number 6 out with it being side by side said the piston came real close to the valve on number 2 said there was a little carbon on the pistons he could see where the valve dusted some of it off so he is going to pay for the crank and all the rest and re bal it
