oil pressure issues

Bryank · January 18, 2012, 02:18:14 AM

it's your mains or cam bearings, you can spin a rod bearing and still run good oil pressure

Kyle · January 18, 2012, 02:59:35 AM

So what would the motor do with bad bearings if it had them? Make noise when its under heavy loads? I did the old fashioned way of checkin em by doin a brakestand without spinnin the wheels and there weren't any noises comin from the motor or it runnin rough bein under all that load

Bryank · January 18, 2012, 03:10:47 AM

if it's your mains you might not hear anything,till it seizes up lol. Sometimes ya here a little noise about 3 grand when cam bearings go bad but very little. Rod bearings you here when ya

up the rpm's a little 1500-2500 rpm.
100 percent- if after you torqued your mains and went to spin the crank IF you could not spin it totally freely, im talking spin with your fingers and it did not spin and spin by itself a few times TEAR it back apart the main bearings are gonna show copper where it's screwed up if not worse.

MR NASTY · January 18, 2012, 01:21:27 PM

Had similar issue in my last motor...started up held 40 tho 50 then within a couple minutes it was down to 15-20. It made no noise and it turned out to be rod bearings. If you want to waste some money keep running it!

Eroq · January 20, 2012, 04:44:54 AM

I don't wanna be the dick to say this but..... that motor needs to come out. The damage is already done, and will only get worse and wipe more parts out.... sounds like your rotating assembly wasn't assembed right. Too much oil clearence causing oil pressure loss. Wrong bearings, antifreeze in oil washed them out, could be a number of things. I highly doubt its your oil pump. They're a gear style pump and RARELY fail.

Jerk the motor, redo the lower end.... no big deal

Kyle · January 20, 2012, 08:12:37 AM

Idk. Ya guys may be right with a bad bearing, but unfortunately for me I don't have a heated garage to be doin all this work in.... I have a garage that my truck don't fit in and a little torpedo heater.....

Ive been watching it closely all the time and it hasn't been dropping below 20psi at idle, so im just gonna have to keep watchin it till spring when its a lil warmer out and I wont be havin to wheel a cherry picker around in the snow unless the psi falls off completely in which ill just shut it down where it is and tow it. And if one of these weekends if it gets to round the 40s and it ain't snowin like crazy over here ill just drop the pan and change the pump anyways

betterbeaters · January 20, 2012, 12:13:14 PM

Quote from: Kyle on January 20, 2012, 08:12:37 AM
Idk. Ya guys may be right with a bad bearing, but unfortunately for me I don't have a heated garage to be doin all this work in.... I have a garage that my truck don't fit in and a little torpedo heater.....

Ive been watching it closely all the time and it hasn't been dropping below 20psi at idle, so im just gonna have to keep watchin it till spring when its a lil warmer out and I wont be havin to wheel a cherry picker around in the snow unless the psi falls off completely in which ill just shut it down where it is and tow it. And if one of these weekends if it gets to round the 40s and it ain't snowin like crazy over here ill just drop the pan and change the pump anyways

good luck hope a rod dont jump out the block one day!

Kyle · January 20, 2012, 12:20:15 PM

Quote from: betterbeaters on January 20, 2012, 12:13:14 PM
Quote from: Kyle on January 20, 2012, 08:12:37 AM
Idk. Ya guys may be right with a bad bearing, but unfortunately for me I don't have a heated garage to be doin all this work in.... I have a garage that my truck don't fit in and a little torpedo heater.....

Ive been watching it closely all the time and it hasn't been dropping below 20psi at idle, so im just gonna have to keep watchin it till spring when its a lil warmer out and I wont be havin to wheel a cherry picker around in the snow unless the psi falls off completely in which ill just shut it down where it is and tow it. And if one of these weekends if it gets to round the 40s and it ain't snowin like crazy over here ill just drop the pan and change the pump anyways

good luck hope a rod dont jump out the block one day!

wouldnt it make some noise if its about to do that?

betterbeaters · January 20, 2012, 12:26:32 PM

I have had them make noise and I have had them just exit with just low oil pressure.. its 50/50 if you ask me.. but with the money you got in it I wouldnt take the chance of still driving it. but thats me and I dont have the money to fix my motors every year!

Kyle · January 20, 2012, 12:38:23 PM

Quote from: betterbeaters on January 20, 2012, 12:26:32 PM
I have had them make noise and I have had them just exit with just low oil pressure.. its 50/50 if you ask me.. but with the money you got in it I wouldnt take the chance of still driving it. but thats me and I dont have the money to fix my motors every year!

yea i dont like taking the chances either, but its my dd

how far would i need to go if i took it apart? just the bottom end? or cam and all too?

poorboyzmuddin · January 20, 2012, 01:45:03 PM

when i spun mine it made all kinda noises just saying.....

Squirell · January 20, 2012, 05:28:45 PM

Just the bottom end need to come out, but if you are still driving out like this the motor will need to come out be tore down and the Mains will need to be line bored, crank or rods resized...by running out farther your just costing yourself more money every time you turn the key

old school truck dude · January 20, 2012, 10:01:42 PM

Quote from: Squirell on January 20, 2012, 05:28:45 PM
Just the bottom end need to come out, but if you are still driving out like this the motor will need to come out be tore down and the Mains will need to be line bored, crank or rods resized...by running out farther your just costing yourself more money every time you turn the key

x2 You will also need cam bearings, maybe even a cam, and its probably got shavings all through it. If you dont pull it and clean it completely (hot tank) youre just gonna have the same premature failure over and over. Im gonna take a wild guess and say when the 80 jets flooded it, raw fuel blew by the rings and got in the oil pan, thinned the oil out and got some shavings started circulating through the motor, they ground up the bearings, and the rest is history. Im just guessin. It may run till spring or even spring of 2015 - who knows? But if its your DD, you want reliability.

Kyle · January 20, 2012, 10:17:30 PM

Quote from: old school truck dude on January 20, 2012, 10:01:42 PM
Quote from: Squirell on January 20, 2012, 05:28:45 PM
Just the bottom end need to come out, but if you are still driving out like this the motor will need to come out be tore down and the Mains will need to be line bored, crank or rods resized...by running out farther your just costing yourself more money every time you turn the key

x2 You will also need cam bearings, maybe even a cam, and its probably got shavings all through it. If you dont pull it and clean it completely (hot tank) youre just gonna have the same premature failure over and over. Im gonna take a wild guess and say when the 80 jets flooded it, raw fuel blew by the rings and got in the oil pan, thinned the oil out and got some shavings started circulating through the motor, they ground up the bearings, and the rest is history. Im just guessin. It may run till spring or even spring of 2015 - who knows? But if its your DD, you want reliability.

it ran maybe 10 mins on those 80 jets and it wasnt really that bad

Squirell · January 20, 2012, 11:18:35 PM

it ran maybe 10 mins on those 80 jets and it wasnt really that bad
[/quote]
i flooded a motor in less than a minute when a float stuck it dont take long. but i would assume that to be the problem as old school truck dude said. but my advice is...you want to save money in the long run. stop running this motor. you need 7psi for every thousand rpm. so unless your keeping this motor under 2000 rpm. i would stop driving it. other wise your goin to need a block when a rod exits stage left with or without warning

Kyle · January 20, 2012, 11:39:55 PM

Quote from: Squirell on January 20, 2012, 11:18:35 PM
it ran maybe 10 mins on those 80 jets and it wasnt really that bad

[/quote]
i flooded a motor in less than a minute when a float stuck it dont take long. but i would assume that to be the problem as old school truck dude said. but my advice is...you want to save money in the long run. stop running this motor. you need 7psi for every thousand rpm. so unless your keeping this motor under 2000 rpm. i would stop driving it. other wise your goin to need a block when a rod exits stage left with or without warning
[/quote]

i get that no doubt, but its getting at least that. its been gettin bout 20psi at 1k and is up to 40 at 2k

7d9_z28 · January 21, 2012, 12:40:18 AM

excuses and beating around it is going to screw you big time kyle. just because this=that or, that isnt quite exactly the same,or however you want to warp the story, these guys are right. If you keep it going you're gunna destroy it. stick the nose in the garage, seal it off, turn on the heater, and drop the pan. you can determine from that inspection if it will need to be torn down or not.

you are my best friend, I cant let this happen to you!

five stages of grief:

Denial-where you are
Anger
Bargaining
Depression
Acceptance-where you need to be

Bryank · January 21, 2012, 01:30:33 AM

if it's at 20 idiling and 40+ running down the road that's not that bad. But if it gets lower and starts making any noises i'd definately shut her down but in your circumstance i understand your problem. It'd be nice if ya had a spare 350 to throw in for a temp,maybe you can find a decent one for $200 and run that till yours is fixed?

Squirell · January 21, 2012, 01:33:09 AM

Quote from: 7d9_z28 on January 21, 2012, 12:40:18 AM
excuses and beating around it is going to screw you big time kyle. just because this=that or, that isnt quite exactly the same,or however you want to warp the story, these guys are right. If you keep it going you're gunna destroy it. stick the nose in the garage, seal it off, turn on the heater, and drop the pan. you can determine from that inspection if it will need to be torn down or not.
x2

7d9_z28 · January 21, 2012, 02:09:41 AM

Quote from: Bryank on January 21, 2012, 01:30:33 AM
if it's at 20 idiling and 40+ running down the road that's not that bad. But if it gets lower and starts making any noises i'd definately shut her down but in your circumstance i understand your problem. It'd be nice if ya had a spare 350 to throw in for a temp,maybe you can find a decent one for $200 and run that till yours is fixed?

he still ahs the tbi 350 that was in it running when he put the 408 in... but convincing him to pull the 408 in the first place is the tough part!