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Thread: wheres the oil pressure?

  1. #11
    Join Date
    Nov 2007
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    Pittsburgh, PA
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    what color O ring are you using?
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  2. #12
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    Feb 2010
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    Odessa, texas
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    wheni put the pickup tube on i put it in the oil pump and tightened it down before i put it on the motor


    im using the black seal that came with the oil pump which is the same as the blue one from dealership

  3. #13
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    Quote Originally Posted by danger_ranger83 View Post
    wheni put the pickup tube on i put it in the oil pump and tightened it down before i put it on the motor


    im using the black seal that came with the oil pump which is the same as the blue one from dealership
    blue is for Fbodys brown/red are for trucks

    i had that problem with my 408.




    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  4. #14
    Join Date
    Feb 2010
    Location
    Odessa, texas
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    Quote Originally Posted by Quik View Post
    blue is for Fbodys brown/red are for trucks

    i had that problem with my 408.




    on the paper that came with it it says to use the red one with a tube that is flared at the end and the blue one for a tube that is smooth. i had a blue seal in there the first time it didnt have pressure and replaced it with a red seal and still didnt fix the problem then replaced the oil pump and same problem still

  5. #15
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    Feb 2010
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    Odessa, texas
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    im not tryin to argue thats just what it says to do.. thank u for the advise i guess im gonna tear it down tonight and change the cam bearings and while i have it apart ill make sure which seal is in there


    ever heard of someone changing the cam bearings with the motor still in the truck?

  6. #16
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,540
    I don't believe that is even possible. Do you know what PN and brand of bearings you put in there? There are two sizes, one for 2004 and earlier and the other for 2005 and later, if I remember correctly. They will not interchange is what I was told by my builder. Do you heads have all 10 head bolts the same length or are the two outer ones under the valve cover shorter? You can check to see if the pump is working properly by making an aluminum block off plate to go between the oil pan and the return plate that is above the oil filter. Drill a hole in the block off plate so that oil can enter the return cover (front hole) and tap the cover for a manual gauge. Pull all the plugs out and disconnect the fuse to the injectors or just disconnect them. Get someone to crank the engine until you start showing oil pressure. I actually started my old engine for a few seconds and it had 60 psi of oil pressure. When I removed the cover and put it back to normal I only had 15 psi, with 20w50 oil! While assembling my rebuilt engine I noticed my cam retainer plate had a cut in the silicone so I replaced it. Same engine that had 15 psi with 20w50 now has 60 with 5w30. Inside your oil pan by the oil filter, does your pan have a pressure relief valve built into it like the new pans do?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  7. #17
    Join Date
    Feb 2010
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    Odessa, texas
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    Quote Originally Posted by RedHeartbeat View Post
    I don't believe that is even possible. Do you know what PN and brand of bearings you put in there? There are two sizes, one for 2004 and earlier and the other for 2005 and later, if I remember correctly. They will not interchange is what I was told by my builder. Do you heads have all 10 head bolts the same length or are the two outer ones under the valve cover shorter? You can check to see if the pump is working properly by making an aluminum block off plate to go between the oil pan and the return plate that is above the oil filter. Drill a hole in the block off plate so that oil can enter the return cover (front hole) and tap the cover for a manual gauge. Pull all the plugs out and disconnect the fuse to the injectors or just disconnect them. Get someone to crank the engine until you start showing oil pressure. I actually started my old engine for a few seconds and it had 60 psi of oil pressure. When I removed the cover and put it back to normal I only had 15 psi, with 20w50 oil! While assembling my rebuilt engine I noticed my cam retainer plate had a cut in the silicone so I replaced it. Same engine that had 15 psi with 20w50 now has 60 with 5w30. Inside your oil pan by the oil filter, does your pan have a pressure relief valve built into it like the new pans do?
    the motor is a 99 the outer head bolts are shorter the pump is brand new so idk what to do what do u suggest?

  8. #18
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    Feb 2010
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    Odessa, texas
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    pulled the retainer plate off and its not ripped anywhere but in some places the seal is kinda smashed and doesnt stick out looks like it wouldnt seal very good

  9. #19
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    Feb 2010
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    Odessa, texas
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    Unhappy

    i guess its not gonna make oil pressure no matter what i do

    so out comes the motor for some new cam bearings
    ill take it to the machine ship this time

  10. #20
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    Feb 2010
    Location
    Odessa, texas
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    ok well im pullin the motor and i went to pull the cam out and it wont come out its like its hitting something

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