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HELP Low/No Oil Pressure on AMC 360 |
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teenmechanic 
AMC Fan 
Joined: May/26/2022 Location: Calgary, Albert Status: Offline Points: 3 |
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 Topic: HELP Low/No Oil Pressure on AMC 360Posted: May/26/2022 at 2:12am |
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Hey folks, I'm in need of some input here. I've got a 1977 AMC Matador sedan with a 360 in it, and it was leaking significantly from the oil pump. I just got done replacing the oil pump housing gasket, and didn't touch anything else. Now I'm feeling like I WAS supposed to touch something else. I went to fire it up, and the oil light is the thing I was watching for. Sure enough it popped up. I do not have an oil pressure Guage handy at my shop, so I have no idea what the pressure looks like. All I know is there aren't any INSANE noises coming from the top end just a very slight bit clacky. Barely noticeable. Do I need a new housing? Timing cover? Gears? Or is there something I'm missing. Thanks for any help here, don't want to drive it till it's good. Thanks!
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1982AMCConcord
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Joined: Jul/13/2012 Location: Kenosha, WI Status: Offline Points: 1287 |
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Posted: May/26/2022 at 6:26am |
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Hey there... I see you have just signed up recently... Welcome...
Unfortunately this is in the wrong place... this should be placed in the Engine section...
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6880 |
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Posted: May/26/2022 at 7:22am |
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Need the calibrated oil pressure gauge to tell you if you need to start replacing parts.
Without this, when you replaced the oil pump housing gasket, how did the timing cover pump housing look and did you measure the pump shaft end play?
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Ken_Parkman
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Joined: Jun/04/2009 Location: Ontario Status: Online Points: 1814 |
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Posted: May/26/2022 at 8:00am |
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Did you pack the oil pump with assembly lube or something? If you assemble it dry often they will not pick up. You probably do have a problem and you must fix before running the engine anymore. Take the oil pump cover back off and coat everything with nice gooey assembly lube.
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tufcj
Supporter of TheAMCForum 
Supporter of TheAMCForum Joined: Jul/10/2007 Location: Watkins, CO Status: Offline Points: 4085 |
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Posted: May/26/2022 at 8:03am |
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When you had the cover off, did you pack the gears with something like Vaseline? The pump needs something in it to "prime" it the first time. If the gears are dry, it won't draw any oil through. You may be able to remove the filter and squirt some oil in the filter hole with an oil can to get it going. Bob tufcj
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69 AMX
74 Javelin AMX 67 Rogue If you need a tool and don't buy it... you'll eventually pay for it... and not have it. Henry Ford |
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BU1
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Joined: Aug/11/2016 Location: MN Status: Offline Points: 2012 |
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Posted: May/26/2022 at 9:59am |
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I just primed my 290 on the stand. Dry oil pump gears. Pre filled the filter and spun it on. Chucked a stripped down distributor into a cordless drill. Had oil pressure within 5 seconds.
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AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642 #2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959 |
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teenmechanic
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Joined: May/26/2022 Location: Calgary, Albert Status: Offline Points: 3 |
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Posted: May/26/2022 at 12:30pm |
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I see now that I've posted this in the wrong section, although I absolutely appreciate the info that I've gotten. I see now that I assembled it too dry. I DID put a little bit of oil in there just to give it some lube, although I don't think it was enough. I like the idea of Vaseline, so I'm going to give that a try, and see if that fixes my issue. I'm also going to prime the system, which I don't believe I did sufficiently. Anyway, thanks guys, I'm sure I'll report back if it doesn't go well ;)
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jblue1555
AMC Nut
Joined: Sep/27/2009 Status: Offline Points: 280 |
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Posted: May/26/2022 at 12:35pm |
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have always used vasoline to insure oil pump prime. Had to do it to a 383 Mopar yesterday that wouldnt pick up the oil.
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BU1
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Joined: Aug/11/2016 Location: MN Status: Offline Points: 2012 |
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Posted: May/26/2022 at 12:49pm |
Get a gauge and hook it up temporarily to verify pressure or lack thereof before taking stuff apart. You need a baseline pressure reading before going down any other rabbit holes.
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AMO #2726
#1 1968 AMX Rally Green 343 Z code 4spd since 1975 #02642 #2 1968 AMX Rally Green 290 N code 4spd since 2019 #02959 |
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Cloudyday
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Joined: Nov/27/2020 Location: Southern Indian Status: Offline Points: 68 |
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Posted: May/26/2022 at 5:09pm |
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I ran a aftermarket guage temporarily to my newly rebuilt 360 for a couple weeks before relying on the factory dash guage just for peace of mind.
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teenmechanic wrote: