360 AMC I'm ready to pull my hair out! - JeepForum.com

 
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post #1 of 6 Old 08-07-2005, 11:03 PM Thread Starter
ChadsCherokee
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360 AMC I'm ready to pull my hair out!

First off I have ran AMCs for a long time BUT this one has me stumped. Started off with a Reman that has been sitting for almost three years. Prelubed everything and added a mild cam. Upon start up it ran very strong BUT had no oil pressure? After some consideration I took the pump apart and stuffed vasolin in it. Started it back up and got 5psi at idle and it would only get up to about 25psi when accelerating. Checked everything about a half a dozen times still the same. By now I'm getting a low but definite knock out of the bottom end ARRGH!! So I got a brand new timing cover, oil pump gears, timing chain (old one snapped due to fuel pump block off plate having too long of bolts), Put it all back on, vaseline in the pump and started it back still only have 5psi- 25psi?!?! I did check the clearance on the pick up tube and I'm right a 1/2 inch. I've spent a lot of time and $$$ getting this project going not to mention almost two years building it. Only to be stopped by this. PLEASE HELP

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post #2 of 6 Old 08-09-2005, 07:49 PM
WVBLACKJEEP
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360 AMC I'm ready to pull my hair out!

How are you reading the oil pressure via a gauge in the Jeep. If so try a manual oil pressure gauge connected to the port where the oil pressure switch is now. That shall give you a true reading from the engine and not a gauge. Check the pressure to see if the readings are correct. Or maybe change the oil pressure switch to see if that would change. But I suspect that you already have a new oil pressure switch installed already. Plus is there any oil that is pumping up to the rocker arms or not?
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post #3 of 6 Old 08-09-2005, 11:22 PM
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Just a thought, but after you packed the pump with vaseline, did you prime the pump manually before you started it? When I put my 360 in, I packed the pump with vaseline, then made a tool which slid into the distributor hole on the timing cover & engaged the oil pump. I used a variable speed drill to turn the oil pump & prime it up. I haven't had any oil pressure issues. Just something you might want to try.

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post #4 of 6 Old 08-10-2005, 07:19 AM Thread Starter
ChadsCherokee
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No, I haven't got a mechanics guage to try out. But I did try out two mechanical guages and even tried hooking up a electronic guage. They were all consistant. Getting oil throughout the engine I have volume but no pressure. No I never actually primed the pump I always just fill teh filter up with oil that way it get sucked right in and has a good amount of draw to it. I've done it that way dozens of times without any issues. BTW here's an update Pulled apart the actual block to check for debris and cleaned out a chunk of something?? Turned it over with coil unhooked and I'm shooting oil over my truck parked next to it! I think I have found my culprit but it may have cost me a bearing set.
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post #5 of 6 Old 08-10-2005, 05:09 PM
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There should also be a spring/piston in the pump that regulates pressure, make sure it's not out of whack.
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post #6 of 6 Old 08-10-2005, 09:37 PM Thread Starter
ChadsCherokee
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Yep checked that also put in the hihgher tension spring.
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