Oil pump install question.

Small Block Mopar Engine

  1. FlDart360

    FlDart360 Well-Known Member

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    Ok so the motor is out of the car and while I’m at it I’m going to change the oil pump. Can someone tell me the dos and don’ts of threading the oil pickup into the new pump? The book I have only address the height and alignment to the pan but says nothing about connecting the pickup to the pump. Do you use any type of thread locker? What are the common mistakes people make? Also would it be prudent to replace the front transmission seal on my 727 before putting the motor back in? Thanks all will check back after work today.
     
  2. yellow rose

    yellow rose Overnight Sensation FABO Gold Member

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    If it's a stock pan and pick up, the pick up needs to lightly touch the pan. It can't back out if done correctly. You can use some pipe dope on the threads if you want to.
     
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    • FlDart360

      FlDart360 Well-Known Member

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      What about Locktight? Is that to extreme. I think i'm overthinking this.
       
    • yellow rose

      yellow rose Overnight Sensation FABO Gold Member

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      Yup. Overthinking it. It the pickup is touching the pan, how can it come out? It can't. And if it's a stock pan and pickup, then the pickup needs to be touching the pan.
       
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      • nm9stheham

        nm9stheham Well-Known Member

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        I would not hesitate to put blue loctite on it.
         
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        • krazykuda

          krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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          I tape two nickles to the bottom of the pick-up, then test fit the pan so the nickles hit the pan when placed on the block with no gasket to set the pick up height, then remove the nickles and install the pan...
           
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          • yellow rose

            yellow rose Overnight Sensation FABO Gold Member

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            That's too far away, per the FSM
             
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            • krazykuda

              krazykuda Well-Known Member FABO Gold Member How-To Section Editor

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              It's always worked for me...

              I never did see in the service manual where they set the pick up to... Can you let me know where it's at???
               
            • yellow rose

              yellow rose Overnight Sensation FABO Gold Member

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              image.jpeg image.jpeg image.jpeg image.jpeg I could find it in any service manual, but I grabbed my 1973 off the shelf. So...1973 service manual, page 9-46, 9-47 and 9-48.

              Starting with Engine Oiling Sytem at the bottom of the page...Installation (1) Inspect alignment of of oil strainer (pickup). Bottom of strainer MUST be parallel with the machined surface of the cylinder block. Bottom of the strainer MUST touch the bottom of the pan with 1/16 to 1/8 inch interference.

              Emphasis mine.

              This is why guys have oil pressure issues, think they "suck" the pan dry or a ton of other crap when the fact is they put too much clearance between the pan and the strainer.

              It needs to touch. It's how it's engineered. Just like I've been saying since 1980 in my high school auto shop.

              I've added the pictures because this place is crawling with professional bickerers and people who would argue with a stop sign around here.

              You can't argue with the dudes who engineered the parts. Well, some of you can. And will.
               
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              • FlDart360

                FlDart360 Well-Known Member

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                Thanks this is really helpful I would love to find a true manual like the one pictured.
                 
              • Dicer

                Dicer Back Bone beats Wish Bone all the time. FABO Gold Member

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                • yellow rose

                  yellow rose Overnight Sensation FABO Gold Member

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                  You can find them online. I found this one for my current car at a swap meet last April. I also have a few others I keep for reference.
                   
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                  • RustyRatRod

                    RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                    I agree 100%. That's what the blue is for. Something you "may" remove again "one day".
                     
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                    • nm9stheham

                      nm9stheham Well-Known Member

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                      Interesting about the pickup touching the pan with some degree of interference (the 1/16" to 1/8" as above), to keep pressure on the pickup. I have read that when the /6's came out, that was not being done at the factory and the pickup were just touching the pan. Customers supposedly complained about the odd noise from the lower part of the engine that would come and go. Can't recall if there was a TSB on that or not.....

                      Fast forward: Guess who installed a /6 pickup that was just touching the pan, and who now has a funny noise in the lower part of his /6? LOL
                       
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                      • yellow rose

                        yellow rose Overnight Sensation FABO Gold Member

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                        Ford and GM did the same thing with their pick ups. My dad bought my mom a brand new 71 Maverick with an inline 6. Even with an extra quart of oil in the pan, every time you turned to the left the low oil pressure light would come on.

                        Turned out that one got off the assembly line with the pickup 3/8 off the floor of the pan. Set the pick up on the floor of the pan and it ended all that.
                         
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                        • FlDart360

                          FlDart360 Well-Known Member

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                          Ok so I had another first time surprise when I was unbolting the headers. I don’t remember this happening on my small block 289 but I guess it must be a Mopar thing. Coolant coming out of the bolt holes when I removed the headers bolts? I hope this is normal? It wasn’t every hole. Do I just dab some RTV on them when I put things back together?
                           
                        • yellow rose

                          yellow rose Overnight Sensation FABO Gold Member

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                          Yep. The front and rear holes go to water on those heads. Perfectly normal.
                           
                        • Mattax

                          Mattax Just the facts, ma'am FABO Gold Member

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                          The AMC 360 (and prob all the engines in that family) has a little plastic button riveted into the bottom of the pickup.

                          @FlDart360 One other tip. When installing the pump to the block make sure it stays seated until the bolts are tight.
                           
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                          • yellow rose

                            yellow rose Overnight Sensation FABO Gold Member

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                            I forgot about that. I've seen engine come in with the button still on and the pickup .375 off the floor. And they wondered why they need an extra quart and a half to keep the oil pressure up on the big end after a pass.

                            Had some BBC's come through with the same complaint. It's a problem.
                             
                          • tattooedguy

                            tattooedguy New Member

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                            So what happens if it doesnt touch? Bend it?
                             
                          • Max1196

                            Max1196 Well-Known Member

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                            Rotate it. And it touches the pan. See the imprint in the muck!
                            100_1364.JPG 100_1366.JPG
                             
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                            • tattooedguy

                              tattooedguy New Member

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                              I assumed it had to be level and touching the pan
                               
                            • FlDart360

                              FlDart360 Well-Known Member

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                              I hear that's a common mistake thanks for the reminder.
                               
                            • FlDart360

                              FlDart360 Well-Known Member

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                              Since I don’t know how quickly I will get this engine back in the car would it be a good idea to squirt some oil in each cylinder. I don’t know if any antifreeze might have dripped some ware it should not have when I rotated the engine on the stand?
                               
                            • nm9stheham

                              nm9stheham Well-Known Member

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                              Certainly, and wipe it all around. When I get coolant in the cylinders, I'll rotate the engine several times and wipe it off the walls repeatedly as the rings push it up.
                               
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