GOT a distrib that seems to come loose and not hold timing?
MOST DISTRIB CLAMPS LOOK LIKE THIS
THEY WORK BUT NOT EXCEPTIONALLY WELL,
step one
Ive seen this frequently, and almost always its a case where if you measure carefully, youll almost surely find,
the oil pump drive shaft is bottoming out solidly between the oil pump and the distributor gear is binding,
so the distributor is not firmly seated against the intake manifold surface.
the oil pump drive shaft length MUST BE about .050 SHORTER than the distance it would take to firmly seat it inside the distributor drive gear, the cam has a gear that spins the distributor and the oil pump drive shaft is driven by that distributor gear in the lower distributor that extends down to the oil pump drive.
this gear must not bind on the distributor too oil pump drive shaft when the distributor is seated firmly on the intake manifold and clamped into place there must be about .050 clearance minimum
related threads you should really read
http://garage.grumpysperformance.com/index.php?threads/oil-pump-drive-shafts.123/
http://garage.grumpysperformance.co...ibutors-wont-seat-on-intake.12538/#post-63636
http://garage.grumpysperformance.com/index.php?threads/oil-pump-drive-shafts.123/#post-19025
http://garage.grumpysperformance.co...ing-an-oil-pump-pick-up-tube.1800/#post-43110
http://garage.grumpysperformance.com/index.php?threads/distributor-gear-wear.1701/#post-4160
http://garage.grumpysperformance.co...butor-clamp-that-just-won-t-clamp-firmly.871/
http://garage.grumpysperformance.co...-allows-the-distrib-to-turn-even-tighten.873/
http://garage.grumpysperformance.com/index.php?threads/setting-timing-question.1411/#post-3131
http://www.jegs.com/i/Moroso/710/26215/10002/-1
the distributor won,t move if its installed correctly
"Why does it have the bolt hole and the slot?
John"
the clamps firmly tightened to the distributor shaft after the timing is correctly set,locking its location in relation to the block,a STUD gets installed with LOCTITE into the intake manifold, it sticks up about 1.25" and most guys use one of these
and it has to go thru the SLOT, the cap screw is used to tighten the clamp to the intake.
with practice you can pull and replace the distributor and maintain the correct timing.
you SHOULD READ THRU THIS LINK ALSO
viewtopic.php?f=55&t=293&p=358#p358
BTW if you have a mijnor oil leak around the distributor base youll want to verify that
you have the GASKET between the intake and distributor housing, and a decent clamp?
http://www.summitracing.com/parts/MRG-1009/?image=large
MOST DISTRIB CLAMPS LOOK LIKE THIS
THEY WORK BUT NOT EXCEPTIONALLY WELL,
step one
grumpy, no mater how hard I tighten the distributor clamp on my intake manifold,
I will almost enviably, find its moved and will require re-timing. any ideas?
Ive seen this frequently, and almost always its a case where if you measure carefully, youll almost surely find,
the oil pump drive shaft is bottoming out solidly between the oil pump and the distributor gear is binding,
so the distributor is not firmly seated against the intake manifold surface.
the oil pump drive shaft length MUST BE about .050 SHORTER than the distance it would take to firmly seat it inside the distributor drive gear, the cam has a gear that spins the distributor and the oil pump drive shaft is driven by that distributor gear in the lower distributor that extends down to the oil pump drive.
this gear must not bind on the distributor too oil pump drive shaft when the distributor is seated firmly on the intake manifold and clamped into place there must be about .050 clearance minimum
related threads you should really read
http://garage.grumpysperformance.com/index.php?threads/oil-pump-drive-shafts.123/
http://garage.grumpysperformance.co...ibutors-wont-seat-on-intake.12538/#post-63636
http://garage.grumpysperformance.com/index.php?threads/oil-pump-drive-shafts.123/#post-19025
http://garage.grumpysperformance.co...ing-an-oil-pump-pick-up-tube.1800/#post-43110
http://garage.grumpysperformance.com/index.php?threads/distributor-gear-wear.1701/#post-4160
http://garage.grumpysperformance.co...butor-clamp-that-just-won-t-clamp-firmly.871/
http://garage.grumpysperformance.co...-allows-the-distrib-to-turn-even-tighten.873/
http://garage.grumpysperformance.com/index.php?threads/setting-timing-question.1411/#post-3131
http://www.jegs.com/i/Moroso/710/26215/10002/-1
the distributor won,t move if its installed correctly
"Why does it have the bolt hole and the slot?
John"
the clamps firmly tightened to the distributor shaft after the timing is correctly set,locking its location in relation to the block,a STUD gets installed with LOCTITE into the intake manifold, it sticks up about 1.25" and most guys use one of these
and it has to go thru the SLOT, the cap screw is used to tighten the clamp to the intake.
with practice you can pull and replace the distributor and maintain the correct timing.
you SHOULD READ THRU THIS LINK ALSO
viewtopic.php?f=55&t=293&p=358#p358
BTW if you have a mijnor oil leak around the distributor base youll want to verify that
you have the GASKET between the intake and distributor housing, and a decent clamp?
http://www.summitracing.com/parts/MRG-1009/?image=large
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