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Old 01-26-2006, 12:43 PM
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Pre-oiling

Im trying to prime the oil pump on a sbc i just built. I was just wondering if oil is supposed to make it all the way up to the heads because i dont seem to be getting any. I can tell im moving oil around cuz it gets all over the shaft of the tool im using, but it just doesnt seem to be getting up on top. I thought maybe it shouldnt get on top because usually the push rods draw the oil up with the engines running because they spin, but my dad seems to think something is wrong since its not getting to the top.

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Old 01-26-2006, 12:49 PM
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Yes you should be able to get oil to the push rods/rockers. What type oil primer are you using? Is it a home made tool?

Steve
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Old 01-26-2006, 12:51 PM
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Prime

how long did you run the drill??? I have seen it take 10 to 15 minutes to get oil up and out all the rockers...

what drill are you using??? it needs to run at least 700 rpm and you can not use a cordless because they run out of smoke before your done...If you using one of those 375 rpm heavy duty drills it might take forever...

what tool are you using??? Are you using a old distributor????

How much pressure do you have on the gauge????

keith
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Old 01-26-2006, 12:53 PM
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Quote:
Originally Posted by pearldrumbum
I thought maybe it shouldnt get on top because usually the push rods draw the oil up with the engines running because they spin.
The oil is supplied to the rockers through the push rods from the oil pressure (from oil pump) going through the lifters, has nothing to do with push rod spinning.

Steve
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Old 01-26-2006, 12:56 PM
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Im using a pretty good drill, im not sure what its peak rpm is, but its pretty strong, its a bosch. and the tool is one i got from a parts store, it was like 12 bucks, but it has a block off for teh distributor hole.
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Old 01-26-2006, 12:57 PM
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The aftermarket oil primer I had (Summit) did the same thing because it was not sealing the bottom of the oil galley that feeds the lifters on the passenger side of the block, and the oil was just going right back into the pan. I had to lift the tool until it almost let the oil out on the top side before it would seal the oil galley and build pressure.
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Old 01-26-2006, 01:00 PM
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oil

71 is correct sometimes you need to lift the tool to get it to prime right , or use 2 gaskets under it if you get tired of holding it up..

how long did you run it???
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Old 01-26-2006, 01:03 PM
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i suppose i just need to be more patient. I usually stop when the dril starts smoking which is like 3-5 minutes into it. Ive only tried about 3 times but they were pretty spread out, like an hour between attempts. ill also try lifting it. thanks for the advice guys
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Old 01-26-2006, 01:14 PM
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oil

3-5 minutes is probably not enough...

Also have your dad turn the engine over while your running the drill...

Keith
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Old 01-26-2006, 01:23 PM
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This is sounding familiar........ .
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Old 01-26-2006, 03:57 PM
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Quote:
Originally Posted by k-star
3-5 minutes is probably not enough...

Also have your dad turn the engine over while your running the drill...

Keith
took the words outta my mouth.
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Old 01-27-2006, 06:06 AM
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Did you fill the lifters and filter with oil before during assembly with the lifters and at install with the filter? If not it may take a while to fill everything. More than likely, more than the 3 to 5 min. If you time it your 3 to 5 may be less as while standing there smelling your drill it seems a lot longer than it really is.
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