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Old 08-23-2008, 09:20 PM
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Distributor Issue?!!!

I have read as many post on this issue before posting... I consider myself a pretty intelegent,calm person, but at this point I was very close to throwing the dist thru the windshield and I feel like an idiot having to spot this...

When I get to tdc on the compression stroke the only place the distributor will seat fully the rotor is facing toward #2 or the exact opposite. I read about timing marks on the top of cover, but this motor is out of an 88 GMC and I checked the original timing cover. It is a 350 that was TBI and ran great in the truck. I had the timing chain off at one point but did not move anything and put it right back on. I messed with it for a very long time! I am working alone and turning over the motor by hand and holding my finger is frustrating but was possible. I am extremely stumped and am open to any advice?

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Old 08-23-2008, 10:22 PM
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Your oil pump shaft needs to be turned to match the drive tang on the distributer when it is indexed to your cap....Reach down in the distributer hole with a big slotted screwdriver and turn the pump shaft bit by bit until you can get the distributer installed.


If you turned the motor over with the distributer out, the oil pump shaft did not move with the rest of the valve train. The distributer shaft drives the oil pump .


Hope this helps..
Mikey
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Old 08-23-2008, 10:23 PM
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Sometimes getting the dist to drop in is tough. The gear will go in in many places as the gear teeth mesh, but the actual drive tang on the dist is like a flat screwdriver and will only go in when lined up. Some guys will take a long screwdriver and turn the oil pump shaft a tad, then try to drop in the dist.

Personally, I drop it in so the rotor is heading for the #1 cap tower. When it stops, I bump the starter and it drops all the way down when the oil pump drive lines up with the dist. Usually works every time.

Mark
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Old 08-23-2008, 10:28 PM
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If you look closely at the gear on the distributor you will notice that it is spiraled. When you remove it by pulling straight up on the distributor, the gear will revolve slightly as it slides past the cam gear. As it does this, it also moves the oil pump shaft slightly. Often when you re-install the distributor the slot in the pump shaft will be about a tooth over before it will again mesh with the distributor.
To fix this, take a long screwdriver and put it in the slot on the pump shaft and rotate the shaft back about one tooth. Now when you re-install the distributor it should line up again.

Good luck.
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Old 08-23-2008, 10:37 PM
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Thanks guys...actually got it before i read your posts... Used stock lug wrench from car (Clean) to move oil pump shaft... Put it all back together... Turned the key and it fired up with in one sec and actually idolled before using the timing light... wish it was not 12:40 at night... Would really like to thank everyone on this site who has helped me along the way!!! Could have not done it with out this site!!!
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Old 08-23-2008, 11:06 PM
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Don't ya just love it when things actually go well!! Glad it's going. You can enjoy an early morning ride.....let the neighbors sleep for now.

Mark
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