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Old 02-23-2013, 06:01 PM
tbean tbean is offline
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Help Please

Ok, so I am new to this Y-block thing so I will give a little background. I recently purchased a 59 F-100 4x4 that is powered by a 292 y-block. It did not run when I got it. I fiexed multiple problems and got it running again. Now I decided to fix the oil leak, which was originating from the EXTERNAL OIL PUMP. That in itself threw me for a loop but the truck came with an extra pump that was still new in the box. So today I set out to change the pump. After a few hours of cursing and breaking knuckles, I got it all in and ready to go. Started the truck up, it still runs great. Only problem is that I now have zero oil pressure. So I took it back apart, tried again, and again. Finally I concluded that there was something wrong with this pump. So I put the old one back on. Still no oil pressure. It has me completely stumped and I am giving up for the night. Please someone help me.

Tom
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Old 02-24-2013, 08:55 AM
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hiball3985 hiball3985 is online now
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Assuming it has enough oil in the pan, and this is a guess,

Was the seal that goes on the end of the pickup tube where it goes into the pump damaged or missing? It could be sucking air rather then oil.
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Old 02-24-2013, 10:23 AM
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The new pump came with a new seal and I don't see any damage to it. The old one was chewed up from years of abuse. Is there any way that the shaft could not be lining up with the distributor? Or do I need to prime the pump itself? I topped off the oil yesterday just to make sure after it didn't work the first time.
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Old 02-24-2013, 12:17 PM
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Quote:
Originally Posted by tbean View Post
The new pump came with a new seal and I don't see any damage to it. The old one was chewed up from years of abuse. Is there any way that the shaft could not be lining up with the distributor? Or do I need to prime the pump itself? I topped off the oil yesterday just to make sure after it didn't work the first time.
Howdy Tom,

Welcome Aboard!

I think he's suggesting you pull the pan and ensure that the pickup tube and screen is still intact, submerged in oil and NOT sucking air.

This is fairly common. Also, before you start the engine you should absolutely pull the distributor and use a small drill motor to turn the pump and ensure that it is in fact primed and working. (turn it counter-clockwise)

You can use a 1/4" drive, 1/4" socket and extension to rotate the pump once it's in place.

I can make 50 PSI with my pump turning it by hand with a speed wrench!

Regards,


Rick
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Old 02-24-2013, 05:13 PM
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I think the pump lost it's prime. I have had this happen it is eather sucking air or it or it needs something in the pump to start it to pump. If you take off the bottom plate the one with 4 bolts in it. Do not mess up the O ring they are impossable to find. And pack the pump with petroleum jelly. Put the plate back on and start it up. That will usally work.
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Old 02-24-2013, 06:47 PM
tbean tbean is offline
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Thank you for the info, today I just left it alone. I'll get back at it tomorrow evening and let y'all know what works.
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Old 02-24-2013, 06:49 PM
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And 57_ford, would I have to do an oil change immediately after doing that?
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Old 02-24-2013, 07:55 PM
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And 57_ford, would I have to do an oil change immediately after doing that?
No, that shouldn't hurt a thing, it will mix right in. I just assumed you primed it a little before installing it. I usually just pour oil in it and turn it over by hand a few times.
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Old 02-28-2013, 03:48 PM
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Are you sure the gauge works and is hooked up properly?

The oil pump drive shaft will fall out with the pump removed. Did you make sure to reinstall it before fitting the new pump?

The best thing to do on an engine that had not been started in a long time is to remove the distributor and turn the pump by hand or with a drill. If it is working, it should turn smoothly, but with a good bit of resistance. If there is virtually no resistance, you need to find out why.
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Old 03-03-2013, 07:01 PM
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We have oil pressure! Thanks for all the help. I ended up re-priming the pump and manually turning it through the distributor hole. Worked like a charm.
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Old 03-03-2013, 07:01 PM
 
 
 
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