I finished putting my 331 race motor togeather.When I primed the motor i got 60 PSI at the gauge. Looks good. But i didnt get hardly any oil to the top end.I used lots of assy lube (lucus green ) on everything so i fugured I might have pluged things up a little. so I put extra lube on the rockers and when ahead and fired it up. Sounds great. Good oil pressure. Ran it for about 2 minutes. 2 to 3 k RPM. shut it off. Pulled a valve cover. STILL NO OIL!! No oil leaks anywhere. Pulled the front cover off and checked the galley plugs. Still in there. cranked the motor over without the cover. No leaks. I'm at a loss? Help?
thats a tough one. a cam bearing could have been left out or the oil passage to the top end of the motor may be clogged up. i suspect you will need to start tearing down till you find where the oil is stoping or going
no oil up top What block are you using as well is it solid roll-lifters? I might be able to give you some Info.
It's a 72 ford block. Everything was real clean when it came back from the machine shop. I ran water thru all the pasages and blew it all out with air. I'm running a solid flat tappet cam. All new parts.
I thought of that too. I pulled half of them already and they are clean. My lifters are new. I bought a cam and lifters from Comp Cams. Guess I'll pull the intake and start checking things. This SUCKS!!!
What about the oil crossover plug? If it is missing or popped out, would that cause no lifter valley oil flow?
Since you are getting no pressure to both sides my first instinct would be the head gaskets are installed opposite. or you have some missing plugs.....but yeah tearing it apart would be the best thing to do at this point to eliminate any and all issues.....I know there is an plug under the intake that isnt always installed or falls out but that effects only one side....passenger side if I remember correctly....I have not had a 302 a part in so ling I just can not picture one in my head anymore.....been messing with mod motors for to long now.... lmao duh ....I was not thinking head gaskets on 302 have no oil flow through.....my bad again I work on all motors....and after 18 years things get jumbled.... but the plug under the intake still stands.....
Check to make sure your front and rear oil galley plugs are installed. Also, that plug at the crossover under the intake mentioned above. When it was apart did the machine shop put all the plugs into the block or did you do that?
Thats whats driving me crazy. i put all the plugs in. Time to pull the intake. I pulled the timing cover already. the 3 front plugs are in there. What worries me is if the block is plugged up between the filter and the main oil galley, I would still get oil pressure at the gauge but the motor would be running dry. That would suck
That sucks Robbie. When you get the intake off and confirm the cross over plug is there then what I would do is pull the cylinder 1 intake valve lifter and prime the pump with a drill. See if you get oil into that lifter bore. If you dont then work your way back pulling a lifter at a time until you find a lifter that does get oil or if none at all. Also pull the cross over plug and see if you get oil there. If no lifters get oil then maybe the front main bearing slipped and is blocking the oil passage that feeds the rest of the engine. EDIT, looks like the lifters get oil before it goes to the main bearing, but has some feedback coming back to them after the bearing.
Simple at this point pull the intake if that leads no where that motor needs to come out and everything needs disassembled and rechecked.....I know it sucks but you gotta do what you gotta do....:Handshake
