had a REALLLLY bad day with new engine

I finnaly got my combo put together a 464 and started it for the first time on friday let it break in ran it for about 20 min @ about 2000 rpms no problem warmed up fine and sounded great with the 290-oh8 cam and the 3inch exhaust.oil pressure at idle was about 15-20psi then came the problem apperantly the holley 850 dp was leaking gas into the oil pan whitch thinned the oil out witch I dident see until I drained it after I heard the knock it was like water..SO now I am going to pull it and inspect the crank and have it polished then replace the clevlitt 77 with a new set..Just needed to vent some frustration its easier to do it to you guy than on the wife because she cant understand the reson for the frustraition after all it only a car right :ball:

 

I'm prolly going to get criticized for saying this, but I would try replacing the oil first and then once again after a few minutes. If the motor was not run dry and you weren't beating on it when it happened, I doubt you did much (if any) damage to your bearings. There was oil in it although it was very thin. Sometimes really thin oil will knock. But then if you are a perfectionist like I am, you won't ever be happy until you take it all apart and see for yourself. :laugh: You may only need to replace the bearings.

 

I agree with nailheadina67,first change the oil and see,i dont think you damaged anyting.

Thanks

 

Do yourself a big favor! Take a tin snip and cut the seam off your oil filter to open it up. That will tell you if there is any damage. Shavings and bearing material will be in there if anything happened.
Jeff

 

I tryed changing the oil and the knock was still there at about 3500 rpms that was the first thing I thought of I had my hopes up but no luck,and I also cut the oil filter apart was full of small really fine metal shavings also when I pull the drain plug there was shaving on the magnet.The oil had a grayish silver tint to it like there was metal in it .

 

That doesn't sound too good, hopefully it didn't do too much damage. I will wish you good luck on it and hopefully when you inspect it (or whoever does), the damage will be minor.

 

I think its kinda normal to have some metal shavings on your oil pan plug magnet isnt it?the knocking part i`m not sure of though.

Thanks

 

it's more than the average little trace ..I took the pan off and there is some small shavings ..I am going to take the caps off on friday and get a better look right now they are all tight when you wigle them but further inspect will be done...

 

I feel sick.

 

Oh man hope that isn't a sign of the times. I just had mine done out to 464 by Earick Racing, haven't started it yet, man I feel sick. Mike D.

 

if you feel sick I already lost it ...

 

There's still some hope.......maybe you'll get lucky and the crank journals will be OK. Remember, the bearings are made of a soft material. If it was running without a load on it from driving you may be OK still. I hope this works out for you, I know the feeling when big $$$ and a lot of hard work go down the crapper when you first start a fresh motor.

Just remember, you aren't the first guy in history this has happened to. Once a long time ago I ran a furd 302 with a new crank and bearings for nearly 10 minutes with no oil pressure.......the pump rod was not engaged into the distributor and the new out of the box pressure switch (KEM) wasn't working so the light never came on. :af: Believe it or not, the the bearings survived and it never knocked once it got pressure.......I pre-lubed the bearings really well with STP oil treatment, maybe that's what saved it. ou:

 

That fine metal you are seeing is probably from the cylinders or the rings. What was the hone finish on the cylinders? If running moly rings. they should have been done with a 500 or 600 stone. A coarser finish will eat the rings, and the walls will give off metal until polished smooth.The bearings are soft and do not make that fine metalflake, nor would the crank. Bearings will flake off in larger pieces, or sitck to the crank.
My friend did a 350 buick that had a awful lot of "color" in the oil for the first 2 changes. It stopped, and never seemed to be a problem.
A noise is a problem, though.

 

Hi guys,

Some shavings are normal. Here's a pic of my last oil filter...

 

...and the stuff on the cup

 

the oil in the bottom of my filter was a silver color... I am going out to the garage when I get up this afternoon I will let you know what the bearings look like o No:

 

I inspected the rod bearing they all looked like new...what else would cause a knock?It doesnt knock at idle but around 3000 rpms it is really loud banging I had a couple of chevy motors start knocking and they did it all the way throught the rpm range more so when the oil pressure was lower...The buick at idle the pressure is @ about 15psi o No:

 

It may be the crank hitting the pan or the oil pick up tube? Once that happenned to me on a Ford.....the pickup tube was bent and I didn't know it. :bglasses:

 

Could it be something like a wrist pin?

 

What are your build details? Is this your first engine? Have you run this combo of parts before? What brand and viscosity of oil did you use for break-in? I don't believe a dripping carb could foul your new oil to the point of causing lubricating problems in 20 minutes. Are you sure the noise is bottom end? Are your pistons hitting your heads? That would be an extremely sharp noise that happens all at once on spin up out of an otherwise quiet engine. A rod knock would be audible almost always with no load and would change sound with engine speed. Is your flexplate tight? Torque converter tight? Wish I could hear it. Good luck.