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  #1  
Old 03-10-2011, 09:45 PM
kdt75 kdt75 is offline
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Default Oil pressure help...suggestions...?

Hi guys...I'm stalled. I have a 99 dodge 2500 4x4 with the 5.9 v8. After finding a common issue in other threads with the plenum gasket and experiencing the oil consumption and a miss that kept getting worse...I took on the plenum.

So...I've replaced the plenum gasket...intake gaskets...tb gasket...and at the suggestion of other members in threads I read...the bypass hose...cap, rotor, wires & plugs...pcv valve...

I fired it up and it stalled & sputtered and finally idled right...I topped of the antifreeze and took it for a spin...before I hit the end of the driveway the oil pressure gauge dropped and the check gauges light came on. I shut the truck down...checked the oil level again...which was normal...I restarted the truck and the oil pressure came back up...I took it back up to the house and the gauge dropped again. I though maybe I bumped the oil pressure sender while working on the intake so I checked that...it was alright. I changed the oil and filter at this time. I tried it again and the oil pressure gauge bounced 4 or 5 times...so I figured I had a bad oil pressure sender. I took my daughter to work...about 6 miles away...and when i pulled in the top end of the motor was knocking....so I shut it down and got it home. SO...when I start it...I have oil pressure...and about the time it takes to put it into drive...the gauge drops to zero.

Any suggestions? Did I do something when replacing the plenum? Is it just my turn and need to replace the oil pump?

Sorry for the novel...thanks for any and all suggestions...

Kyle
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Old 03-10-2011, 11:06 PM
mattdott mattdott is offline
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if you didn't put something in the lifter valley you may have gotten trash in it which could have made its way into the sump. it a pain but i would check that before replacing the oil pump.
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Old 03-10-2011, 11:08 PM
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Sorry to hear of the bad luck . It sounds like it's time to drop the oil pan . Look for anything that may be clogging the pickup tube . If you don't see anything , I'd recommend to ya to replace the oil pump , and inspect the rod and main bearings while your there . If they look bad replace them . Let me know what you find . Pics if possible .
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Old 03-10-2011, 11:11 PM
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Any chance you could have left a rag or something in the lifter valley that could impede the oil returning to the pan?
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Old 03-10-2011, 11:19 PM
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Quote:
Originally Posted by RamTech View Post
Any chance you could have left a rag or something in the lifter valley that could impede the oil returning to the pan?
Oh that wouldn't be good . I've seen that before .
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Old 03-10-2011, 11:22 PM
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I know it's pretty unlikely but I'm trying to think outside the box. Never heard of anything like that happening from a plenum pan fix.
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Old 03-11-2011, 09:53 AM
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I was pretty careful in keeping the valley clean...I even ran the shop vac in it to make sure I didn't leave any big chunks in it...I'm positive I didn't leave anything in valley too...dang...just my luck...leave it to me to have an issue that Ramtech hadn't heard of...LOL...

On the good side...the hesitation and miss are gone...

Alright...looks like I'll drop the pan this weekend and have a look at the oil pickup...

Thanks guys...I appreciate it!

Kyle
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Old 03-14-2011, 08:53 PM
kdt75 kdt75 is offline
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Default I found it!!!

Okay guys...I dropped my pan...sure enough the pickup screen is completely plugged...so...two questions...should I just replace it with a new one? And how do I get it off of the pump...will it unthread from the pump the way it sits or does the pump need to be dropped to remove it? Anything I need to be concerned about here? I'm in uncharted territory! Thanks for your help!

Kyle
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Old 03-14-2011, 09:04 PM
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Quote:
Originally Posted by kdt75 View Post
Okay guys...I dropped my pan...sure enough the pickup screen is completely plugged...so...two questions...should I just replace it with a new one? And how do I get it off of the pump...will it unthread from the pump the way it sits or does the pump need to be dropped to remove it? Anything I need to be concerned about here? I'm in uncharted territory! Thanks for your help!

Kyle

personally, if it's all clogged up, and you're in there anyways, i'd swap the whole darn assembly (oil pump and pickup). you eliminate any problem that might be caused in the very near future, by not replacing them.

as far as the pickup unthreading.... need a chance to check the book. I'm sure Ramtech will be along to enlighten us in the mean time.

good luck
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Old 03-15-2011, 01:27 AM
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You know SD...I think your right...I'll just swap it all...new pump and pickup...I'll see about getting a higher volume pump. Are there any things I need to watch out for? Will the shaft drop out? I've never swapped a pump before...but not afraid to try! Any tips or tricks??? The things only been parked for 7 days...what's one more!

Thanks guys...I really do appreciate your help!!

Kyle
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