Wiped Cam And Low Oil Pressure

[car9fan]

HELP I been noticing a loss in power in my car i just got done putting in a new short block but i used my old soild lift cam in it at first it was running great but the last month i been noticing a loss in power. So last week i was going down the road and it started making a poping sound and the oil pressure was going down a little bit i took off the valve covers off and turned the motor over by hand and about 3 or4 CID.the valves are not opening i can see the other valves open and close but on these CID.the rocker arms dont go down, So i ordered a new cam and lifters BUT do you think that the wiped cam would efect the oil pressrure, Thanks for any advice Ronnie

[82 GT]

When you put your old cam back in, did you put the lifters in the exact same bores they came out of? That's VERY important when reusing a cam in a new engine(unless it's a roller cam).
I'd be asking myself why the cam failed instead of a drop in oil pressure at this point.

[car9fan]

yes i put them in the way they cam out. I never seen nothing like it the intake rocker arm gos all the way down an up the ext. valve dont even start to open, Ronnie

[Jeff Chambers]

If you wiped the cam out, metal most likely went throughout the entire engine. At a minimum I'd pull the motor and remove the oil pan for inspection. You may have wiped out some bearings as well, leading to the lower oil pressure.

[car9fan]

The old motor was lossing power and thats one reason i got the new short block, But now the short block is doing the same thing as the old motor, That was the first time i ran the new motor really hard and it just didnt have the power but it was idleing great, last night i changed the oil and couldnt find no metel shavings. But the funny thing is the oil psi. went all the way around past a 100psi it has never done that so i let it warm up and it was holding 40 psi at idle, Thanks Ronnie

[82 GT]

But the funny thing is the oil psi. went all the way around past a 100psi it has never done that so i let it warm up and it was holding 40 psi at idle, Thanks Ronnie

100psi!!! What weight oil are you running.....gear lube! :D

[car9fan]

10 w 30, Iam thinking the oil pump might be getting ready to go. I just did a comp. check most are 160 psi and 100 80 i dont know whats going on

[rwhite65]

did u re-use the oil pump from the old engine? If so, replace it ASAP with a new stocker...I would not run it until u do.
Ryan

[car9fan]

Yes i did reuse the old oil pump, I started taking the motor out bnt dhouldnt i get a high volume oil pump? Ronnie

[82 GT]

A high volume pump is not really needed. It all depends on who you ask about that subject. I would also suggest you get a new oil pump shaft while you're at it. It's $7 cheap insurance.

[rwhite65]

82GT is right on both accounts in my opinion. The high volume oil pump is really not needed. Think of it this way, how many 5.0's can u think of that have had gobbs of miles put on them, been ran into the dirt, and the whole time did it with a stocker oil pump? I put a stock one in mine and it has great oil pressure.
Get a new oil pump shaft, but get a new hardened one. Still very cheap and insurance that is worth the few bucks.
Ryan

[car9fan]

Thanks i will get a new shaft iam pulling the motor tommoow and check ALL bearings if they look bad i will replace them, Iam hoping the oil pump is just getting ready to go and replace it eather way CAR9FAN