FrontEngineDragsters.Org Forum

Technical => Matt Shaff's Engine Shop => Topic started by: Pat Johnson on July 20, 2017, 08:00:26 AM

Title: no oil pressure
Post by: Pat Johnson on July 20, 2017, 08:00:26 AM

Hey guy's, after racing three weeks ago, I had just serviced my Dart small block, after changing my oil and cleaning my system 3 filter,I now have no oil pressure at the gage and nothing coming out the line from the block to the gage, I havent done any other checks as of yet,I spun the motor over till the starter got hot and still no oil pressure, Dart little m 406 motor, what more do i need to do before i drop the pan.

Title: Re: no oil pressure
Post by: dreracecar on July 20, 2017, 08:18:48 AM

was there oil pressure on the last run???
pull the mag/dist to see if you broke the intermediate pump shaft, other than that, sooner or later you will have to drop the pan

Title: Re: no oil pressure
Post by: Paul New on July 20, 2017, 09:57:03 AM

Ditto what Bruce says but in all reality drop the pan it doesn't take that long!

Title: Re: no oil pressure
Post by: glofria on July 20, 2017, 12:54:31 PM

What type of pump is it?

Is it possible that you don't have enough oil i the pan for the pump to pick up? Try adding another quart.

Title: Re: no oil pressure
Post by: dreracecar on July 20, 2017, 02:39:05 PM

Said "after changing the oil" and we can assume that he did fill it back up again.  I have always after a build was to use a pump drive and a drill motor for oil pressure to save wear on the starter motor

Title: Re: no oil pressure
Post by: George on July 20, 2017, 04:15:28 PM

I have experienced the same on a very similar setup. I prime the oil system and fire it. Oil pressure comes right up.

Title: Re: no oil pressure
Post by: Frontenginedragsters on July 20, 2017, 05:48:34 PM

Pull the distributor and prime the oil with the correct tool before you do anything else.

Title: Re: no oil pressure
Post by: glofria on July 20, 2017, 10:10:43 PM

Quote from: dreracecar on July 20, 2017, 02:39:05 PM

Said "after changing the oil" and we can assume that he did fill it back up again.  I have always after a build was to use a pump drive and a drill motor for oil pressure to save wear on the starter motor

Bruce, I never assume the obvious.

Could be the gauge took a dump. scene that happen too. Is it electric or mechanical?

Have heard some Titans Pumps get an air bubble in them and won't work.  :-\

Title: Re: no oil pressure
Post by: Pat Johnson on July 21, 2017, 07:03:33 AM

Thanks everyone, problem solved. motor oil was very slow since its 50w, also found some silicone that must have fallen thru one of the oiling holes from the valve cover gasket, after that, pulled the Mag and spun the pump over, had instant oil pressure ,Thanks again folks,Racers helping racers .Many heads are better than one.

Title: Re: no oil pressure
Post by: dreracecar on July 21, 2017, 04:48:29 PM

Quote from: glofria on July 20, 2017, 10:10:43 PM

Quote from: dreracecar on July 20, 2017, 02:39:05 PM

Said "after changing the oil" and we can assume that he did fill it back up again.  I have always after a build was to use a pump drive and a drill motor for oil pressure to save wear on the starter motor

Bruce, I never assume the obvious.

Could be the gauge took a dump. scene that happen too. Is it electric or mechanical?

Have heard some Titans Pumps get an air bubble in them and won't work.  :-\

 I can only go by what the man writes on his post, change oil is to replace what was there, drain oil as to remove all contents to fill at a later time. so in effect the oil was drained,not changed. Nothing coming out of the block to the gage as in one pulled the line and rotated the engine and no oil squirted out the line could not make the reasoning for the gage being bad or good. Whatever, issue has been resolved