i think I have a scavenge issue

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Nov 19, 2025 | 09:56 AM

#11

randallissimo

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From: SWFL

Now we are getting somewhere. No, I did not prime the pump, not intentionally anyway. I did lube it up real good with assembly lube, but, no I did not add oil. Thanks for pointing that out, I need to try it. Rookie mistake. Everything else on the pump rebuild, including gear woodruff keys I am confident is OK. Also, I have confirmed the gears are spinning.

No oil at rockers until about 2000 RPM is exactly what I was wondering about, and would explain things in this case. Also confirms that maybe I did not actually have a circulation problem after my rebuild other than my own lack of understanding of the subject, and not knowing how to check. If so, that's OK with me. Failure is a part of success, next time it comes up I will know it cold.

So, if we don't see oil at the top end at idle, how do we know we are getting oiled up there after say, a new build? What is usual procedure? Put it together and take it for a run on faith? I did the spit over the rocker hole test and did see a few bubbles, so that would fit a low pressure at cranking theory at least.

Last edited by randallissimo; Nov 19, 2025 at 09:59 AM.

Nov 21, 2025 | 06:43 PM

#12

GREENOHAWK69

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From: DFW

Did you changes the oil lines that go to/from the oil tank? If yes, where did you get them?

Nov 21, 2025 | 07:43 PM

#13

randallissimo

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From: SWFL

I changed the rubber hoses, not the hard lines to/from the filter. I got the rubber at OReilly or Autozone.

I primed the pump by pouring some oil into the check valve hole. Also, lubed it up good with assembly lube when it went together. But I no longer have the scavenge issue question, that has been resolved. It was working all along. So I think this thread is run it's course.

Thanks again.

Last edited by randallissimo; Nov 21, 2025 at 07:48 PM.

Nov 21, 2025 | 10:32 PM

#14

Rains2much

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From: Florida

The import part is we need to know what brand of oil were you using? And do you use it in all three holes?

Nov 22, 2025 | 05:28 AM

#15

Yankee Dog

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From: Brighton, MI

Quote:

Originally Posted by Rains2much

The import part is we need to know what brand of oil were you using? And do you use it in all three holes?

On the same note, if you used Amsoil, all of your mechanical problems would go away and your dog will be able to speak 3 different languages.

Nov 22, 2025 | 05:48 AM

#16

RANGER73

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From: Beyond Fucital

The lower part of the motor never drains, it's lower than everything else.
There's a scavenger puck you can put where the oil filter goes that you put on during an oil change.
The little residual oil in the motor isn't going to hurt it. No way it's a quart.
When I use the scavenger puck, I only got out a cup of oil at most before it started coming out clear.