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09-06-2020, 09:54 PM | #1 |
Junior Member
Join Date: May 2010
Location: Sacramento, CA
Posts: 6
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No Oil Pressure in 8BA
Hey fellas. So I've taken a 10+ year hiatus on my coupe '29 project due to LIFE and am just now getting back on it. I had a 59AB that ran good but had 0-2lbs of oil pressure at stop lights. I parked it, built an old chopper, life happened, and now here we are. Instead of dropping coin on a build, I picked up an 8BA from a buddy that had been sitting in his garage for 15 years. Long story short, I swapped water pumps, pulley, generator (12V), checked valves and lifters for movement, and everything looked good. Got it installed and just dropped in a Chevy converted distributor and new coil from Charlie in NY and finally got it fired up today (WOOHOO!)! I noticed the oil gauge didn't budge so I shut it off after about 15 seconds or so. Checked the oil (good), rechecked all lines to make sure I wasn't spraying oil anywhere and they were all good too. Fired it back up for a couple of seconds and still nothing so I shut it down. Also, this motor was pretty sludgy when I took it apart so maybe the oil pump is gummed up?
Now, is there any way to test the pump with the motor still in the car? If not, can I pull the pump with the motor still in the car by dropping the pan? Really hoping to not have to pull everything again to swap it. Not sure If I have to access the idler pulley in front of the pressure plate. Any advice is greatly appreciated! |
09-06-2020, 10:21 PM | #2 |
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Join Date: Apr 2019
Location: Kansas
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Re: No Oil Pressure in 8BA
You can pull the pump by dropping the pan. Could have a sludge blocked screen or possibly not turning due to a problem with the drive gears you mentioned,but worth dropping the pan first.
No way to test the pump in the car.
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09-06-2020, 11:13 PM | #3 |
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Join Date: May 2010
Location: Eagle River,Alaska
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Re: No Oil Pressure in 8BA
I would hook up a known good mechanical gauge first & see if that reads any pressure. Your factory gauge might be bad. If you have a electric sender, that might be bad, or if your stock gauge is mechanical have you checked to see if the tubing is plugged or has gotten pinched?
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09-07-2020, 03:57 AM | #4 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,259
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Re: No Oil Pressure in 8BA
I had a '51 Mercury engine in storage for at least 20 years. When I finally pulled it out and fired it, it took at least 30 seconds for it to build any oil pressure (this was in 10 second increments with a lot of checking in between). It seemed like an eternity, but on the third or fourth start-up, it finally came up and ran at 55 psi. I think that if they are stored that long, the lose their prime. In retrospect, if I had to do it again, I'd pull the pan and pack the pump like a fresh build.
It's been on the road for about 3 years now with no ill effects. Last edited by tubman; 09-07-2020 at 05:04 AM. |
09-07-2020, 04:53 AM | #5 |
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Join Date: Jan 2012
Location: New Jersey
Posts: 1,423
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Re: No Oil Pressure in 8BA
How about pulling the spark plugs and just crank the motor over?
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09-07-2020, 05:59 AM | #6 |
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Location: Lyman,ME.
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Re: No Oil Pressure in 8BA
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I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver |
09-07-2020, 09:30 AM | #7 |
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Join Date: May 2010
Location: upstate SC
Posts: 2,962
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Re: No Oil Pressure in 8BA
pour some oil down into the oil pump by removing the oil sender or the filter line
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09-07-2020, 09:49 AM | #8 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
Posts: 16,132
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Re: No Oil Pressure in 8BA
I wouldn't start it again until you figure it out. As suggested, pull the plugs and spin it with the starter.
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09-07-2020, 10:49 AM | #9 |
Junior Member
Join Date: May 2010
Location: Sacramento, CA
Posts: 6
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Re: No Oil Pressure in 8BA
So I should have mentioned a few things. This motor had the electric sender and I swapped it for the mechanical unit on my previous motor that worked years ago. Ill probably stop by the parts store and grab another gauge just to be sure its not the gauge. Also, prior to starting it a few months ago, I rigged up a pressure system to feed oil back through the sender (see pic) that I pushed about 4 quarts of oil through. I assumed this would have primed it but if its sludged up maybe its not working right anyways.
And since I know we are all visual folks, I included a pic of the coupe, too. |
09-07-2020, 11:17 AM | #10 |
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Location: on the Littlefield
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Re: No Oil Pressure in 8BA
take out the sender,take out sparkplugs, crank engine, see of it pumps oil out
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09-07-2020, 01:24 PM | #11 | |
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Join Date: May 2015
Posts: 7,924
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Re: No Oil Pressure in 8BA
Quote:
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
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09-07-2020, 03:02 PM | #12 |
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Join Date: May 2010
Location: Shenandoah Valley Virginia
Posts: 220
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Re: No Oil Pressure in 8BA
Good lesson in this thread....I pull apart every engine.....new crates as well as previously owned/run. That's the only way to know what you have. There are usually a few surprises in every one.....like loose rod bolts, bad clearances, poor quality "rebuild", etc. and can be fixed before installation.....time well spent.....eliminates lots of headaches.....
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09-08-2020, 02:28 AM | #13 |
Senior Member
Join Date: Aug 2020
Posts: 140
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Re: No Oil Pressure in 8BA
You need to open the oil line by removing the pressure gauge. The pump is cavating because the pickup tube is empty. Open up the oil line and crank it over until you get enough oil out to get the sump oil up to the pump.
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09-08-2020, 11:41 AM | #14 |
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Join Date: Feb 2020
Location: Hayward,CA
Posts: 513
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Re: No Oil Pressure in 8BA
I’ve had that happen a few times.
Take out the spark plugs, add six more quarts of oil to the crankcase, remove the sending unit, pour oil down the galley where the sending unit came out of, crank it over with the starter until oil comes out where the sending unit goes, drain the excess oil out. I now make sure the oil pump is primed well before installing it. Fill the ports on the top of the pump with oil and turn the pump drive by hand to see it actually pump oil out the top. |
09-09-2020, 07:44 PM | #15 |
Junior Member
Join Date: May 2010
Location: Sacramento, CA
Posts: 6
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Re: No Oil Pressure in 8BA
Got it pumping! Like everyone suggested, I pulled the plugs and cranked it over but didn't get any pressure. So I removed the fitting in the back of the block and fed about 3/4 of a quart into the pump. Gave it a few cranks and it started pumping! Got everything put back together and its working great! Just wanted to say thanks fellas!
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09-09-2020, 07:49 PM | #16 |
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Join Date: Jan 2012
Location: Lyman,ME.
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Re: No Oil Pressure in 8BA
Nice!!!!!.......I like that coupe!!!!.......good for you!!!.....Mark
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I'm thinkin' about crankin' My ragged ol' truck up and haulin' myself into town. Billy Joe Shaver |
09-09-2020, 07:54 PM | #17 |
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
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Re: No Oil Pressure in 8BA
Good to hear it all worked out. There are some anxious moments waiting for the pressure to build; seconds seem to turn to minutes.
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09-09-2020, 09:21 PM | #18 |
Member Emeritus
Join Date: Nov 2012
Location: Wichita KS
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Re: No Oil Pressure in 8BA
Way to go!
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09-09-2020, 10:53 PM | #19 |
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Join Date: Jan 2014
Location: Orcas Island Washington
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Re: No Oil Pressure in 8BA
Been there myself! Great job by you and all the experts that chimed in to help the situation!
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09-09-2020, 11:39 PM | #20 |
Junior Member
Join Date: May 2010
Location: Sacramento, CA
Posts: 6
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Re: No Oil Pressure in 8BA
Thanks guys! Now that I know the motor is a runner I can work on the nick-nack stuff that always seems to pop up on a car thats been sitting. Just in time for spring LOL
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