No Oil Pressure New Rebuild 440

[challeng61]

Engine has been rebuilt including new oil pump and intermediary shaft, has oil and new oil pressure sending unit. I have (0) oil pressure... Any Ideas!!!

[Chryco Psycho]

Do you know what make of pump was used some of the cheaper ones never seem to prime up , I only use Melling , the next problem could be the drive stripped or twisted off . Other problems could be a missed threaded plug at the end of the lifter gallery behind the timing chain .  I ran into a problem once with a lifter that was engineered wrong & had the oil groove too low so when the lifter was closed the lifter would not trap the oil pressur e& it would bleed out the bottom of the lifter bore .
I would start by checking the drive & using a priming shaft to see if you can get pressur ethat way & make sure you have the correct lifters in place as these are easily accessable without tearing into the motor . the oil pump can also be swaped easily from outside the motor assuming this is a big block ?

[burdar]

So is the engine in the car?  It should have been primed on the stand with a drill.  If it's in the car, pull out the oil pump drive shaft and run the pump with a drill.  It may take awhile for it to prime.  If it does finally prime, check to make sure you have oil at the rockers on both sides.  You'll have to rotate the engine because oil only goes to the rockers at certain camshaft positions.

[Changin Gears]

I would connect an aftermarket mechanical gauge to test with.

[brads70]

Fram oil filter by chance?

[cudabob496]

if prime with drill, rotate crank about 45 degrees during each priming session.

is oil pressure gauge even hooked up correctly.

Is there enough oil in engine?

a burped or missing lifter will not allow oil pressure to build

did oil pump suction pipe come loose?

[Changin Gears]

Fram oil filter by chance?

I hope you're joking...

[Chryco Psycho]

Why sis that ? Fram are garbage & seem to have caused many engine failures

[Changin Gears]

Hard to imagine that, what is probably the most sold filter in the US, would cause such a problem.  If this were true, daily drivers would be dropping like flies.  It may not be the best (always a popular internent debate), but no pressure?

[Chryco Psycho]

A friend of mine used nothing but Mopar filters , changed the oil on the truck & had not bought any filters all that was on his shelf was a Fram so he figured how bad could it be really , 1 week later he was pulling the engine , restricted flow / rod knock / damaged brgs

[brads70]

I see it every season with newbies at the speedway I work at. They come off the track with long faces and start loading up the car. I go over to see what up ( I'm a tech inspector at the track) and if they say engine is broke no oil pressure.  I look down and see that familiar old orange fram filter and suggest they change the filter first before going home.  Most of the time they think I'm nuts and I even had to go over to the parts trailer and buy them a Wix filter myself a few times. Change the filter and bingo oil pressure again.
Now to be fair to fram the RACING filters seem to be ok it's when people use the ordinary stock  replacement filters on race engines with high oil pressure that it becomes a problem. But I've never seen yet a stock replacement Wix filter fail either ...
 

[cudabob496]

I think Fram are known to be the cheapest filter in town. Thats why they sell so many.
I use the new K&Ns.
Wix have a good reputation.

[Changin Gears]

To me, this is common sense, I would use a Fram filter without worry.

[Strawdawg]

Common sense would be cutting one open and seeing how poorly they are built...then it becomes clear why they fold up under higher oil pressures and take out engines.  I have seen several engines blown due to just that.  On the other hand, there is no substitute for learning first hand.

[cudabob496]

Spending a few more dollars is pretty cheap insurance verses losing an entire engine!