moesterman
Member
I can not find my manual and was wondering what the plug was for located in the center bottom of the crank case?
crank case plug
- Thread starter moesterman
- Start date
moesterman
Member
It is a recessed plug in the bottom center of the crank case and when I removed it I drained what I assume is engine oil (10-15 ounces)
dogvet
Banned
You've got to be kidding! It's just a case drain plug. Been a mechanic for 25 years and have never heard of priming a crank sensor hole!:loony:
Loafington
Active Member
Leave it in. Buy the scavenger oil change fixture and let that do the complete oil change.
BigDogBro1
Made in the USA
How do you refill or re-prime the crankcase?
You don't know what the hell your talking about. You drain the sump of the engine and fire it up and you starve the engine of oil for 5 seconds. Take you pick. Sul nailed it.
Loafington
Active Member
Here is the skinny from S&S regarding the case drain plug. This is an email message. The message actually starts at the bottom and the most recent reply is at the top.
As far as I can see, this disputed bullshit myth of having to prime your pump if the case drain plug is removed, is well, BUSTED according to S&S, the maker of the S&S 117" engine.
If you get more that a quart of oil out of that plug it would mean that your check ball, in the oil pump, is not seated correctly. You do not need to re-prime your pump.
Thanks,
S&S Tech
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Sent: Friday, July 25, 2008 2:31 AM
To: Glick Brent
Subject: RE: S&S
If that plug is removed, and old oil drained from the case, does the oil pump lose it's prime and need re-priming after the oil is drained from the case?
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Subject: S&S
Date: Thu, 24 Jul 2008 20:53:40 -0500
From: bglick@sscycle.com
That is a drain for the crank case it is not necessary to remove that plug for every oil change but if you want to get any oil out of the case that my be left behind that can be removed. It is a pipe plug thread so there is no real torque spec (just use common sense when tightening) use a thread sealer on the plug before re-installing.
Thanks,
S&S tech
At the very bottom of the evo engine case there is a small pipe plug. What happens if you remove that plug? Should that plug ever be removed? If so, what is it for? Thank you.
As far as I can see, this disputed bullshit myth of having to prime your pump if the case drain plug is removed, is well, BUSTED according to S&S, the maker of the S&S 117" engine.
If you get more that a quart of oil out of that plug it would mean that your check ball, in the oil pump, is not seated correctly. You do not need to re-prime your pump.
Thanks,
S&S Tech
--------------------------------------------------------------------------------
Sent: Friday, July 25, 2008 2:31 AM
To: Glick Brent
Subject: RE: S&S
If that plug is removed, and old oil drained from the case, does the oil pump lose it's prime and need re-priming after the oil is drained from the case?
--------------------------------------------------------------------------------
Subject: S&S
Date: Thu, 24 Jul 2008 20:53:40 -0500
From: bglick@sscycle.com
That is a drain for the crank case it is not necessary to remove that plug for every oil change but if you want to get any oil out of the case that my be left behind that can be removed. It is a pipe plug thread so there is no real torque spec (just use common sense when tightening) use a thread sealer on the plug before re-installing.
Thanks,
S&S tech
At the very bottom of the evo engine case there is a small pipe plug. What happens if you remove that plug? Should that plug ever be removed? If so, what is it for? Thank you.
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You can do what you want and listen to some guy getting paid 5 bucks an hour. I fill up my oil filter when I install it on my hot rod. Do I need to? Probably not....does it save some wear on the engine? You bet. You can never go wrong putting oil back in a place it has to go. In the very least pull the plug wires and plugs and spin the engine over a few times to circulate some oil.
ZZ CHOP
Member
I Always fill the filter with oil on any automotive engine so it doesnt have to run with zero pressure waiting for the filter to be filled, but they are wet sump engines, they rely on the counterweights to sling oil to the cylinder walls, some racers have their cranks knifed edge to cut into the oil instead of the blunt end of the counterweight slapping the oil, it saves some horsepower Then of coarse we all know our engines are Dry sump the crank wheels do not have to be submerged, the oiling is pumped through oil galleys very similar to a car engine Ive owned several hd's and i have never pulled the plug on them, its supposed to be just a spoon full of oil in the sump, maybe a little more on these s&s cases bigger wheels/longer strokes.
Loafington
Active Member
i drained the case before during an oil change and it took about a minute for the oil to show it was circulating back to the tank. looked to me that it took that long for the pump to prime.
i recall last year we were discussing the cc volume of the s&s heads. a few people called s&s tech and each one got a different answer.
The oiling system on our engines (EVO's) does not send high pressure through the oil filter. So you will not see engine oil squirting back to the tank, it sort of dribbles at low pressure. The oil comes from the tank to the feed side of the of the pump. Then the oil goes through the engine and comes out the return side of the pump. From there it goes to the outside of the oil filter and returns through center back to the oil tank. It will take a little time for oil to circulate through the engine, filter and back to tank. This does not mean that your oil pump has lost it's prime. The pump should not lose it's prime unless you have other issues. If you remove and replace the pump, the it should be primed, especially if your tank is lower than the pump. Normal oil changes should not cause the oil pump to lose it's prime. Seems to me that some people around here need to to some more research or know what they are talking about before the post more garbage.
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Loafington
Active Member
Your hot rod, yes, our EVO's, not required. You can do it if you want but there is no benefit to doing so. If it makes you feel good and sleep better, then by all means do it.
Loafington
Active Member
Serious
Loafington
Active Member
It takes time for all of the voids to fill after an oil change. The filter, housing, return line, and anywhere else that oil came out of needs to fill before oil gets back to tank. If the case is drained, then that too will take time to fill. Because it is a low pressure return system, it will take some time.
chris maxx
Member
are you sure its a pipe plug thread? pipe threads are tapered and that sounds like a disaster waiting to happen putting it in the bottom of crank case..i would be willing to bet its not a pipe thread..but your the s and s tech...