Thread: 468 Big Block Noise

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Help me out please?
I had a machine shop rebuild a 454, (1970 car motor) I’m not trying to beat the builder up, however I don’t like a noise, I am hearing in the engine bay. It sounds like a power steering pump knock. I have laid out $5500.00 on the motor. I have had the car back to the machine shop over this noise. The engine builder told me to drive it; he did not think it would hurt.
My concern is, it was two years ago when he rebuilt the motor, he was told upon dropping the motor off, it would be a couple of years before the motor would be fired and was suppose to take specials provisions for that, and now firing it the first time six month ago. Bet you already know what he said “Drive it”.
Let me tell you what I know about the engine. I don’t have all of the specs with me right now, what I can tell you. The motor is a 454 was bored .60 over. Dome Pistons, I have been running 100 percent Cam II.
It was full long blocks rebuild; the cam was larger than a stock 427. it was the largest, I could go with, with out going to a solid lift cam (I wanted to build a prostreet car I could drive not continue to have to adjust lifters on, (old school I guess). Dummy)
I am running a 4500 Stall Convertor I did remove the convertor bolts to make sure their was nothing behind the transmission that may have been causing this fuss.
Than I thought maybe, it was a detonation problem, so I tried a 50/50 mix to no evail.
This noise does not change with engine Rpms.
I did drop the Belts to make sure the power steering / water pump was not the corporate (Nope) not it.
I have had the cam cover off to make sure the cam was not walking. And thought about the risk pins but the noise does not change with the rpm, and it does have an electric fuel pump on it.
So while it is down in the back it’s not two late to tear it back apart up front. Let me know what you think.
I have had it on the strip on one occasion where it turned numbers in the Low and 8s, in the 1/8 mile with 2:73 Gears.
I now have the rear end out laying in a set of 4:88s to get the car in the torque range the motor is looking for. However before I put it in the higher rpms on the strip this noise now concerns me.
This is the first time I have ever used this forrum so you may have to walk me through!
Thanks for all your help!!!!