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low Oil pressure in rebuilt 240
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Author:  m cook [ Sat May 14, 2011 6:40 am ]
Post subject:  low Oil pressure in rebuilt 240

I just started my newly rebuilt 240.Rocker arms not getting oil and lifters clattering.Idiot oil light is out.Installed mech oil pressure gauge,pressure is 10 lbs.Everything new in engine , cam, lifters ,rocker arms, pushrods ,oil pump, pick up.I was told by machine shop there might be a plug behind the cam gear ,not letting galley pressurize.Any help appreciated thanks

Author:  econoaddict [ Sat May 14, 2011 3:30 pm ]
Post subject:  Re: low Oil pressure in rebuilt 240

New cam bearings? If so possible installed wrong and blocking passages.
Was the block hot tanked? If so may have a oil galley end plug missing letting oil out to run right back in pan.
Slim but maybe, head gasket wrong or installed in wrong orientaion?

I have had a couple engines that took awhile to get oil to the top end, I always run the oil pump with a drill until oil is at the rockers then reinstall dist. and fire it.
May try running the pump for a bit with a drill, maybe just some stubborn air in there.

Author:  m cook [ Sat May 14, 2011 7:15 pm ]
Post subject:  Re: low Oil pressure in rebuilt 240

I did prime oil pump with drill but oil never reached rocker arms. The block was hot tanked and cam bearings installed by machinist. Is there a allen plug behind the cam gear maybe i missed ?

Author:  econoaddict [ Sat May 14, 2011 7:39 pm ]
Post subject:  Re: low Oil pressure in rebuilt 240

There should be 2 plugs behind the gear, one bigger than the other.
The big one should be solid and the small one should have a small hole/orifice in it to help lube the gear.
Either missing will result in very low/no oil pressure.

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