comanche1989 Posted September 18, 2012 Share Posted September 18, 2012 Okay, so I have a 1989 Comanche 4.0 with the BA-10 5 speed. About a month ago i had the clutch and master cylinder replaced. Two days later, I was driving and lost all oil pressure. I pulled over, and had the truck towed to my local shop. He said that i had metal shavings in my oil. Coincidence or not? And now it makes a rattling sound when i start it up. What i really want to know is where the rattling is coming from. here's a video of my truck with the rattle. Any Help would be appreciated!!! Link to comment Share on other sites More sharing options...
Jeep Driver Posted September 18, 2012 Share Posted September 18, 2012 I can't see any conection between the clutch and master change and the loss in oil pressure. Link to comment Share on other sites More sharing options...
mountainman Posted September 18, 2012 Share Posted September 18, 2012 sounds like piston slap. Thats why its in such a narrow rpm range at that one spot. when you drive it, it does it juuuust before your about to shift right? at light load and light throttle? How much oil was in the pan when the mechanic took a look? did he tell you it was low? that doesnt sound like a rod knock, but having lost all oil pressure.... either something is up or your gauge sender just quit. You should have an answer if a real mechanic looked at it. Did the oil pressure magically come back? did he do an oil pressure test? what did he find? what does your gauge say now? what weight oil is in it? Link to comment Share on other sites More sharing options...
comanche1989 Posted September 18, 2012 Author Share Posted September 18, 2012 He said that the oil level was fine. i also forgot to say that he changed the rear main seal and put in 5w-30. I usually put in 10w-30 amsoil. He said that the metal shaving from the main bearing diluted and made the oil really light so the oil pump couldnt draw oil and thats why i lost oil pressure.... sounds a little fishy. I think that when they did the rear main seal they could of accidently plugged on of the tiny oil passages? And it occurs at all loads right at about 1900 to 2000 rpm. Also i am currently using my cherokee as a daily driver, but i do occasionally start this up and drive it down the block. Normal oil pressure now.. Link to comment Share on other sites More sharing options...
Jeep Driver Posted September 18, 2012 Share Posted September 18, 2012 He said that the oil level was fine. i also forgot to say that he changed the rear main seal and put in 5w-30. I usually put in 10w-30 amsoil. He said that the metal shaving from the main bearing diluted and made the oil really light so the oil pump couldnt draw oil and thats why i lost oil pressure.... sounds a little fishy. I think that when they did the rear main seal they could of accidently plugged on of the tiny oil passages? And it occurs at all loads right at about 1900 to 2000 rpm. Also i am currently using my cherokee as a daily driver, but i do occasionally start this up and drive it down the block. Normal oil pressure now.. There! This! Never Never Never let someone else touch the internals of your engine...............EVER. Period. Had nothing to do with the 5-30. Link to comment Share on other sites More sharing options...
foreman1063 Posted September 18, 2012 Share Posted September 18, 2012 Mine did the same thing. I dropped the oil pan and the pump pick up screen was full of crap. I replaced the pump/pick up and cured the problem. It runs a solid 55-60 PSI driving and 45-50 at idle and hot. Link to comment Share on other sites More sharing options...
comanche1989 Posted September 18, 2012 Author Share Posted September 18, 2012 There! This! Never Never Never let someone else touch the internals of your engine...............EVER. Period. Had nothing to do with the 5-30. I know, but i thought heyyy, this is a jeep mechanic. Is that where i went wrong? was it the rear main seal that caused it? Link to comment Share on other sites More sharing options...
comanche1989 Posted September 18, 2012 Author Share Posted September 18, 2012 Mine did the same thing. I dropped the oil pan and the pump pick up screen was full of crap. I replaced the pump/pick up and cured the problem. It runs a solid 55-60 PSI driving and 45-50 at idle and hot. Does it have a rattle? Link to comment Share on other sites More sharing options...
Jeep Driver Posted September 18, 2012 Share Posted September 18, 2012 Before anyone jumps my case......... Would I pay $800 for a rebuilt trans from a reputable trans rebulder? Sure I would. I have no interest whatsoever in rebuilding my trans. But I buy the package with a warranty and I install it myself. In my 30 years of driving many trucks/vans/cars no one has ever worked on mine but me short of an alignment. I want to know myself what's going on and what's inside my engines. My guess is yes. The rear main cap comes off to replace the rear seal and who knows what they did? could have scared your rear main.......could have losened all the main caps to drop the crank..........who knows? and they won't admit to it if they did screw something up. It was a 3-4 hour job (at home) with common tools and would have cost you about $50-60. Learn to do for yourself. Link to comment Share on other sites More sharing options...
comanche1989 Posted September 18, 2012 Author Share Posted September 18, 2012 Before anyone jumps my case......... Would I pay $800 for a rebuilt trans from a reputable trans rebulder? Sure I would. I have no interest whatsoever in rebuilding my trans. But I buy the package with a warranty and I install it myself. In my 30 years of driving many trucks/vans/cars no one has ever worked on mine but me short of an alignment. I want to know myself what's going on and what's inside my engines. My guess is yes. The rear main cap comes off to replace the rear seal and who knows what they did? could have scared your rear main.......could have losened all the mail caps to drop the crank..........who knows? and they won't admit to it if they did screw something up. It was a 3-4 hour job (at home) with common tools and would have cost you about $50-60. Learn to do for yourself. I'm in the process of learning but i don't think that going from changing the valve cover gasket to changing the rear main seal is a reasonable idea. I have fairly good mechanical knowledge, but i am a 17 year old working with limited tools. if i could of done it myself i would of. not everyone is as lucky to have as much knowledge as you. But thank you for the advice. Link to comment Share on other sites More sharing options...
mountainman Posted September 18, 2012 Share Posted September 18, 2012 Man this sucks. getting the shop to admit fault will be a nightmare. Now if you pull the pan off and pull rear main cap and see damage, or find any of the main caps loose... then you have your answer. Even then they will prob claim sabotage from you. Always film stuff when doing investigative teardown to prove they were at fault. Wish i was closer id come lend a hand. But all we can do is type and hope for the best for ya. Link to comment Share on other sites More sharing options...
comanche1989 Posted September 18, 2012 Author Share Posted September 18, 2012 Man this sucks. getting the shop to admit fault will be a nightmare. Now if you pull the pan off and pull rear main cap and see damage, or find any of the main caps loose... then you have your answer. Even then they will prob claim sabotage from you. Always film stuff when doing investigative teardown to prove they were at fault. Wish i was closer id come lend a hand. But all we can do is type and hope for the best for ya. Thanks for all the advice man. I'm saving up for an engine lift-minimum wage jobs suck- (already have a stand) i think I'm going to start a build thread on it so i can get advice, this being my first ever engine teardown/rebuild. it will be a slow rebuild since i have school and a job, but hopefully ill have it cruisin by summer. Link to comment Share on other sites More sharing options...
jimoshel Posted September 19, 2012 Share Posted September 19, 2012 Suggest you drop the pan and see what's in it. You're looking for bits, tiny, of metal. It will either be fine, powdery or very small pieces,Drop the rear main for a visual inspection. Post pics and the guys here may be able to come up with something useful. Good luck. Link to comment Share on other sites More sharing options...
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