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  #1 (permalink)  
Old 03-06-2018, 04:40 PM
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no oil pressure

Hey guys, I got this bike back together. I took off the oil tank, welded another bung for another vent. Before I took everything down I noticed the oil gauge never moved, so while I had it down I put on a new gauge. Still no pressure. I know the oil is flowing, I just don't have ANY pressure..Any thoughts? This is my first TC.
I've always read to forget about oil pressure because it will drive ya nuts. My concern is no pressure. If the gauge moved a little Id be happy
thank

Mark
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Last edited by golfish; 03-06-2018 at 05:40 PM..
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  #2 (permalink)  
Old 03-06-2018, 05:36 PM
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Fwiw, this is a 96" twin cam built in 2007. It has S&S cases and I assume S&S oil pump, Andrew cams and everything else is stock HD.
I'm sure its plumbed right.

More info

https://www.streetchopperweb.com/200...gns-racy-rigid
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Old 03-06-2018, 07:05 PM
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If an engine was drained or dry, you need to prime the pump- it may have some air. Just unscrew the check ball screw. With spark plugs out, crank the engine till the oil fills the check hole. Close up. Start up. Should have pressure now.
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Old 03-06-2018, 09:14 PM
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Quote:
Originally Posted by STEINBVG View Post
If an engine was drained or dry, you need to prime the pump- it may have some air. Just unscrew the check ball screw. With spark plugs out, crank the engine till the oil fills the check hole. Close up. Start up. Should have pressure now.
Thank you for the reply. I'm about 99% sure its pumping oil. I removed the return and watch it flow.
Like I said, I'm new to the twin cam engine, it would make sense that at check valve/ball is stuck, its not like the evo.
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Old 03-07-2018, 04:31 AM
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Quote:
Originally Posted by golfish View Post
Thank you for the reply. I'm about 99% sure its pumping oil. I removed the return and watch it flow.
Like I said, I'm new to the twin cam engine, it would make sense that at check valve/ball is stuck, its not like the evo.
You might see a return even with low oil pressure. I had this with an idiot light going on at idle and off at higher rpm. Means low pressure, means top end is underserved oil.
It,s like having air pocket in a brake line.
Primed the pump and voila - once you fire the engine , the idiot light goes off and stays off.
I don,t believe twin cam,s oil pump or the engine itself is principally different from evo.

You have nothing to loose to try it.
Unless both of you oil gauges are shity- it sounds like you do have low oil pressure- no good.
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VITALY.
SORRY FOR THE UPPER CASE. I AIN'T YELLING. I JUST MAKE TOO MANY TYPOS IN THE LOWER.

113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
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Old 03-07-2018, 02:44 PM
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Quote:
Originally Posted by STEINBVG View Post
You might see a return even with low oil pressure. I had this with an idiot light going on at idle and off at higher rpm. Means low pressure, means top end is underserved oil.
It,s like having air pocket in a brake line.
Primed the pump and voila - once you fire the engine , the idiot light goes off and stays off.
I don,t believe twin cam,s oil pump or the engine itself is principally different from evo.

You have nothing to loose to try it.
Unless both of you oil gauges are shity- it sounds like you do have low oil pressure- no good.
I'll give it a try, but there are no check balls like an evo, theres nothing, also the bike has been running like this for hundreds of miles and who knows how long before I bought it. Its pumping pretty good, there should be pressure.

Thanks again for your help.
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Old 03-07-2018, 05:03 PM
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I still can't figure this out. The flow is good but still no pressure. Maybe you guys might see something in a picture or two.
In picture one, the feed line is on the bottom, the return just above that, than the gauge and vent above the gauge.
Is there anyway to check flow to the top? This pressure problem has been like this since I purchased the bike, who knows how long it ran before that. The bike runs good.


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Old 03-07-2018, 05:05 PM
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I took the gauge off and checked it even tho its new, it reads fine. There must be some kind of check ball or valve that stops flow to the gauge, maybe this could be the problem.
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Old 03-07-2018, 05:25 PM
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Found this, might be helpful.
https://www.baggersmag.com/twin-cam-...em-basics-tech
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VITALY.
SORRY FOR THE UPPER CASE. I AIN'T YELLING. I JUST MAKE TOO MANY TYPOS IN THE LOWER.

113"s&s, Walz softail 2000/2012 prostreet
96"s&s, Daytec dyna/ softail hybrid, 1998/2010 chopper
127"Ultima, Chassis Design rigid 2013 bobber
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Old 03-07-2018, 05:48 PM
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Thank you , I'll do some reading
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Old 03-07-2018, 09:14 PM
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Looking at all the videos and info its hard to find anything out about this engine . The cases don't look like any twin cam examples that I can find.
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Old 03-08-2018, 08:45 PM
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Well! I took off return line again and the flow is great, rev the engine and the flow increases. I'm going to try and talk to the builder. It seems to me that the best thing to do is remove the gauge and put in a nice shinny plug.

Sound good to you guys?

Oh! It doesn't seem to be we sumping, if thats possible with this engine.
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Old 03-09-2018, 08:23 AM
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Might be a piece of something in the oil passage running to the gauge? If its working dont fix it..lol
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Old 03-31-2018, 04:38 PM
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I took off the gauge and started the bike, rather than spit oil it sucked air. Bike runs good, changed the rear tire, new chain, just waiting for the seat to come back from the upholstery shop.
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Old 03-31-2018, 07:47 PM
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Have you checked the oil pump screens? Here is a forum thread talking about the
cam tention issues, and particles clogging the pump, might be worth looking into..
Pingel Twin Cam Oil Pump Screens
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