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Super Moderator
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8,495 Posts
Discussion Starter #1

this type above is nearly WORTHLESS

this type bellow works just fine




http://store.summitracing.com/partdetail.asp?part=PRO-66896&autoview=sku
they are dirt cheap or you can make one from and old distributor



be sure you turn the engine over at least two full turns while applying pressure to and lubing the oil passages to get full access to all the lifters,rockers,bearings etc.


"Why is the first one worthless?"

LOOK CLOSELY, the top primer has no collar to keep the drive shaft centered over the pump so it can slightly mis-align and bind, Ive seen them bend the pump drive if guys get them mis-aligned and just throw a high torque 1/2 drill on and spin them without checking, the lower primer has an alignment collar that tends to keep things from breaking,,yes both have the alignment collar for the manifold but only the botom one has the lower block support and alignment sleeve that forms the lower oil passage wall, and the drive collar that assure the oil pump drive itself is lined up correctly,keep in mind,the bottom of the stock distributor forms one wall of the main oil passage to one side of the engine, without that passage wall in place you get no oil pressure to one side and darn little to the other due to the HUGE leak the missing oil passage wall presents, the lower distrib is temporarily replaced with that extra aluminum on the lower primer to simulate the correct oil passage config....THATS WHY!

 

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Super Moderator
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8,495 Posts
Discussion Starter #2
you WON,T get oil to all lifters equally unless the engines crank & cam are spinning,(so durring testing spin the engine slowly with a braker bar or ratchet), because the oil passages feeding the lifters aligns differantly at differant lifts,your oil leak at the distrib base is normal, but the clearances and flow may be excessive, with a priming tool, some are not nearly to spec. ID measure the dia. of the oil pump primer and then measure the distrib base, Id bet the distrib base is larger and fits better, which reduces the potential for leakage.

those bottom two bands form a wall on the oil passage, some guys cut a rounded grouve and install an O-RING so the upper band seals too the block, you don,t want to do that to the lower band simply because thats the oil flow source to the distrib /cam gear
20 psi is about normal for your typical 3/8 drill,max pressure is not nearly as important as checking flow, and for leaks where there should not be leaks, with an engine primer tool,Ive brazed a socket to the top of my oil pump primer and use the 1/2" drive air ratchet to drive it, it won,t heat up and burn up like a electric drill will.
don,t get alarmed if you get zero pressure or flow for a few seconds,(the oil filter and passages need to fill first) thats one reason WHY your pre-priming, to get oil flow to the bearings instantly on start up:thumbsup: you don,t want them running without oil flow if you can prevent it even for 20 seconds
 
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