I would still check it with a gauge. Is the engine knocking? Maybe the pressure relief valve in the oil pump stuck open?
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street car gone road race
- Thread starter gotovato
- Start date
gotovato
Greenie N00B Member
Pump is 2 months old. I can’t believe it would’ve failed.
cylinder 3 rod bearing. Nothing here catches any nail,
gotovato
Greenie N00B Member
Well...
THE CAR FUCKING WORKS. MOTOR IS ALIVEEEEEE WITH A STRONG 80psi cold start
my buddy came by and did some Houdini shit. We know what caused this. I’ll update here in a bit but holy fuck man. Motor sounds fantastic too. We’re gonna do all new rod bearings next week just to be safe but yea fucking right!!!!!! Woooooo!!!!!! I honestly cannot believe it. The trouble shooting my buddy came up with. Next level. Definitely a good guy to know.
THE CAR FUCKING WORKS. MOTOR IS ALIVEEEEEE WITH A STRONG 80psi cold start
my buddy came by and did some Houdini shit. We know what caused this. I’ll update here in a bit but holy fuck man. Motor sounds fantastic too. We’re gonna do all new rod bearings next week just to be safe but yea fucking right!!!!!! Woooooo!!!!!! I honestly cannot believe it. The trouble shooting my buddy came up with. Next level. Definitely a good guy to know.
Wtf man you can't leave me with blue balls like that. What was the issue!?!?!
jdab555
Greenie N00B Member
Sometimes emotions get the better of us with car stuff - thinking logically (and hearing the motor) it definitely didn't sound catastrophic. Pumped it works!
Awafrican
Moderator
Glad to hear things are back on track!
Sent from my SM-G930W8 using Tapatalk
Sent from my SM-G930W8 using Tapatalk
Well get on with it man, TELL US lol
gotovato
Greenie N00B Member
This is like...gonna be a wall of text.
my buddy thought of some good trouble shooting. First off we put the pan back on. Filled oil. Removed the oil filter. We also removed spark plugs and I primed the engine foot floored on accelerator.
Nothing coming out of the filter housing. Not a drop. Pump isn’t sucking anything up. Ok...
my buddy knowing me from my srt4 days knew I probably had Lucas oil around. We used that shit for everything in the neon days. Mostly to quiet piston slap since it was just a neon thing. I had an almost full bottle.
He crammed my oil pump full. Filled the pick up tube. Put it all back together. Pan on. Oil filled. Filter off.
I primed the engine again cranking cranking. This time.
STOP STOP STOP. oil SHOOOOOOOTING out of the filter housing. About 1 liter in 2 seconds of cranking. Well. Fuck. That’s good. Oil filter back on. Primed the engine some more. Saw 1psi. Oh fuck. Ok plugs back in. Crank crank crank. Fire it up.
2psi, 15psi...directly to 80psi clean idle sounding fucking fantastic. That’s it. We’re good.
We’re going to do the rod bearings just because why not so I just ordered some king race bearings.
Theory is the cooked to fuck oil I drained out of the car for 30 minutes caused the oil pump to lose its prime. That’s the best theory we got. We played with the old oil. It wouldn’t even stay on your finger just falls off like water. 0w20 I had for the GFs car even used was thicker then that. I guess I cooked the fuck out of the oil plus high rpm.
this our theory. It’s all we got.
my buddy thought of some good trouble shooting. First off we put the pan back on. Filled oil. Removed the oil filter. We also removed spark plugs and I primed the engine foot floored on accelerator.
Nothing coming out of the filter housing. Not a drop. Pump isn’t sucking anything up. Ok...
my buddy knowing me from my srt4 days knew I probably had Lucas oil around. We used that shit for everything in the neon days. Mostly to quiet piston slap since it was just a neon thing. I had an almost full bottle.
He crammed my oil pump full. Filled the pick up tube. Put it all back together. Pan on. Oil filled. Filter off.
I primed the engine again cranking cranking. This time.
STOP STOP STOP. oil SHOOOOOOOTING out of the filter housing. About 1 liter in 2 seconds of cranking. Well. Fuck. That’s good. Oil filter back on. Primed the engine some more. Saw 1psi. Oh fuck. Ok plugs back in. Crank crank crank. Fire it up.
2psi, 15psi...directly to 80psi clean idle sounding fucking fantastic. That’s it. We’re good.
We’re going to do the rod bearings just because why not so I just ordered some king race bearings.
Theory is the cooked to fuck oil I drained out of the car for 30 minutes caused the oil pump to lose its prime. That’s the best theory we got. We played with the old oil. It wouldn’t even stay on your finger just falls off like water. 0w20 I had for the GFs car even used was thicker then that. I guess I cooked the fuck out of the oil plus high rpm.
this our theory. It’s all we got.
gotovato
Greenie N00B Member
yea man honestly. wouldve never ever guess this and if my buddy didnt come by with his "we're not going out like this" attitude i wouldve called it a day and motor would be coming out. crazy right
Wait the oil pumps aren't self priming?
So I guess you will be running straight 50 on the track now
So I guess you will be running straight 50 on the track now
gotovato
Greenie N00B Member
So these pumps being positive displacement they are difficult to prime if you lose the prime. Oil pumps don’t create pressure that comes from the oil being squeezed everywhere. If the pump is sucking up air, there’s no seal on the pick up point and that’s it. Our theory is just the oil was so cooked, and I drained it for so long the pump just lost its prime.
when my oil cooler goes back on this won’t be an issue again. It was never an issue when I was running my stock block. That said I never revved it as hard and it wasn’t making this power. High temp + high rpm is like oil killer to the max. I’m going to send a sample of my cooked oil to Blackstone but it’s like water thin so that tells me something.
I learned something today I had always assumed that oil pumps in cars were able to prime themselves
gotovato
Greenie N00B Member
Me and my buddy learned this as well. If you Google a bit, v8 guys are HUGE on priming fresh builds. It’s like a die hard thing they do. Pump works the same way soooo I guess that’s what it is? It’s always suggested on a brand new build to pack the oil pump with grease/ vaseline. I guess this is the theory behind it? Not 100% sure.
I did learn a shit load going through this.
seeing how clean that motor is and how clean the bearing was...we knew something fucky was going on.
JohnnyTightlips
Motorhead
I did see a youtube episode where they had issues with an Evo not wanting to make any oil pressure on a fresh build, the fix ended up being to prime the oil pump. Sounds like it was not super common but has happened from time to time. I had no issues on my engine build with a fresh pump but I guess you never know. Glad you got it sorted.
gotovato
Greenie N00B Member
Yea. I’m not the first and won’t be the last. Maybe the first on this platform but being realistic...any shop would’ve told me “you need a motor” so how often is that the answer vs TRY EVERYTHING AND ANYTHING.
dudemancool1904
Greenie N00B Member
not surprised. even with modern lubricants your temps gotta be cooking the juice. glad it's back!
gotovato
Greenie N00B Member
Small updated.
Fresh bearings have arrived. Exactly how I like my metal. Black.
Oil cooler sandwich plate arrived.
Such a nice piece. Setrab isn’t cheap but there’s a reason.
Also found this awesome article today somehow. Not sure how it didn’t come up in my earlier searches but damnnnnnnn. It’s a thing. Who knew?
https://www.tomorrowstechnician.com/video-oil-pump-lost-its-prime/
Fresh bearings have arrived. Exactly how I like my metal. Black.
Oil cooler sandwich plate arrived.
Such a nice piece. Setrab isn’t cheap but there’s a reason.
Also found this awesome article today somehow. Not sure how it didn’t come up in my earlier searches but damnnnnnnn. It’s a thing. Who knew?
https://www.tomorrowstechnician.com/video-oil-pump-lost-its-prime/
In all of my years and oil changes this is totally new to me
