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Username Post: Distributor won't drop back in original spot        (Topic#359015)
Eth727 
Silver Supporting Member
Posts: 276
Eth727
Loc: San Diego
Reg: 04-17-19
12-02-19 12:31 PM - Post#2781397    

Hey guys I had to remove a HEI distributor to put a new intake manifold. I had marked the original locations for reference point for reinstalltion. I went to reinstall it and it didn't drop in the same spot it was when I removed it. How do I get it to drop back into the last spot it was in?
Thanks



 


turbo38s10 
"8th Year" Gold Supporting Member
Posts: 1706
turbo38s10
Loc: Agawam,MA
Reg: 09-17-09
12-02-19 01:21 PM - Post#2781399    
    In response to Eth727

Sounds like the oil pump drive moved a little or you didn't turn the rotor enough to drop in. The gear on the bottom is curved so when when you drop in the distributor the rotor shaft turns some, sounds like maybe you didn't turn the shaft of your mark enough to drop in. Try turning the rotor a little in each direction then drop it in and see if it lines up to your mark. If not look at the bottom of the distributor you will see the slotted shaft. Then look in the distributor hole and you will see the slotted shaft. Those two need to line up after you drop the distributor in, Remeber the gear is curved so as you drop it the rotor will turn some.



 
Eth727 
Silver Supporting Member
Posts: 276
Eth727
Loc: San Diego
Reg: 04-17-19
12-02-19 03:32 PM - Post#2781404    
    In response to turbo38s10

Yeah I didn't turn the motor. My first attempt it dropped in a totally different spot. I was like WTF because I didn't touch anything just rotated it a little to remove it and the same thing when I put it back in. I just kept turn the rotor counter clockwise until it drop in. Each time I did that it would end up in a new spot so I kept doing the same routine until it I finally got it where it should be with the reference mark and photo that I took.



 
IgnitionMan 
Valued Contributor
Posts: 3688

Reg: 04-15-05
12-03-19 10:00 AM - Post#2781433    
    In response to Eth727

A lot of people don't realize the oil drag on the gears in the oil pump can move them backwards when a distributor is removed too fast.

Pull the distributor out very slowly, so the oil pump gears go with the drive shaft and distributor, so the oil pump gear drag doesn't rotate them backwards enough to not be able to install the distributor in its original position.

The colder the oil, the more resistance, the more backwards rotation.

Easy enough to use a long flat blade screwdriver to move the oil pump drive shaft if need be.



 


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