Distributor wont sit .
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Senior Member
Joined: May 2009
Posts: 727
Likes: 1
From: Riverside (Wood Crest) , CA
Car: 1988 Pontiac trans am
Engine: 305
Transmission: 700R4
Distributor wont sit .
So , im in the final stages of putting my engine back together after installing new head gaskets and the distributor wont sit when its pointing at the #1 cyllinder . Before taking apart my engine i set my engine to #1 cyllinder to TDC on the compression stroke then i removed the distributor . After adjusting valve preload i had rotated the engine a couple times then i tried to install the distributor and it wouldnt sit . Could it be that because i rotated the engine without the distributor in place the tab on the bottom of the distributor wont align with the slot on the oil pump ? BTW i tried flipping the dizzy 180* and no luck .
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Distributor wont sit .
Get a long screwdriver and re align the pump dive shaft to line up with slot in dist gear
or put dist in desired position and bump engine over on starter; dist will drop into place
or put dist in desired position and bump engine over on starter; dist will drop into place
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Distributor wont sit .
Look in the dist hole with torch , see oil pump drive , pick screwdriver or anything that will reach slot in oil pump drive 
Hold dist so rotor is pointing where you want it in final position.
Look underneath dist and observe angle of pump drive tang on dist gear
Rotate oil pump drive in block so it is at same angle .
Install dist

Hold dist so rotor is pointing where you want it in final position.
Look underneath dist and observe angle of pump drive tang on dist gear
Rotate oil pump drive in block so it is at same angle .
Install dist
Supreme Member
Joined: Feb 2010
Posts: 1,446
Likes: 2
From: Orlando
Car: 1991 Camaro Z28
Engine: 357, Canfield heads, solid roller,
Transmission: Upgraded 03 Cobra T56
Axle/Gears: 9" 3.50 gears and Detroit Locker
Re: Distributor wont sit .
I usually just put the distributor where I want it and then turn the motor over by hand till it drops. You can have someone bump the motor over too. Works the same. BTW, the rotor does not have to point at the #1 cylinder. Just make sure your #1 plug wire lines up with the rotor, where ever it is.
Supreme Member
Joined: Jul 2000
Posts: 1,014
Likes: 0
From: Kempner,TX,
Car: 1996 Vette / 1992 GSX1100F Suzuki
Engine: 1996 Corvette Coupe 388 LT1 (+.060)
Transmission: Auto
Axle/Gears: 3.07
Re: Distributor wont sit .
Both methods work; the screw driver method and the bump the engine method. I use the bump the engine method since it doesn't call for removing the distributor then replacing it, then, probably removing it again, etc.
Once the #1 piston is at 6-8 degrees BTDC (remember the engine needs some amount of timing advance to start) on the compression stroke and once the distributor is installed with the rotor pointed at the #1 terminal in the distributor cap, I just bump over the engine using the starter. At some point the distributor will drop all the way flush with the intake.
Since the distributor gear and the camshaft gear are mesh with each other, the timing setting isn't effected by the bumping.
Jake
Once the #1 piston is at 6-8 degrees BTDC (remember the engine needs some amount of timing advance to start) on the compression stroke and once the distributor is installed with the rotor pointed at the #1 terminal in the distributor cap, I just bump over the engine using the starter. At some point the distributor will drop all the way flush with the intake.
Since the distributor gear and the camshaft gear are mesh with each other, the timing setting isn't effected by the bumping.
Jake
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