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Bad pressure gauge? #378321 07/17/09 07:47 PM 07/17/09 07:47 PM
Joined: Dec 2007 Posts: 830 east coast Otherlane OP super stock
Otherlane OP super stock Joined: Dec 2007 Posts: 830 east coast	I fired my engine up for the first time a 3 or 4 weeks ago after being on the dyno but i just hook up my pressure gauge with a new stainless braided line,my oil pressure jumps up to 70 pounds than fall straight to 0.Than if i start it up again the needle doesnt move.This is the first time using this gauge in 4 year.Do you think i need to replace the gauge or could there be something else wrong?

Re: Bad pressure gauge? [Re: Otherlane] #378322 07/17/09 07:55 PM 07/17/09 07:55 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Try a different gauge, also check the line, thats the easiest

Re: Bad pressure gauge? [Re: MR_P_BODY] #378323 07/17/09 07:57 PM 07/17/09 07:57 PM
Joined: Dec 2007 Posts: 830 east coast Otherlane OP super stock
Otherlane OP super stock Joined: Dec 2007 Posts: 830 east coast	I thought about trying another gauge.ive been calling all my friend to see if someone has one laying around

Re: Bad pressure gauge? [Re: Otherlane] #378324 07/20/09 08:00 AM 07/20/09 08:00 AM
Joined: Dec 2007 Posts: 830 east coast Otherlane OP super stock
Otherlane OP super stock Joined: Dec 2007 Posts: 830 east coast	Ok I've tired another gauge and the needle goes to 70 than straight to 0. also tied new and used braided #4 premade line,[Edited by Moparts - Family Friendly Site - Keep it clean]?

Re: Bad pressure gauge? [Re: Otherlane] #378325 07/20/09 08:13 AM 07/20/09 08:13 AM
Joined: Jan 2003 Posts: 4,049 Shelby Twp. Mi HardcoreB master
HardcoreB master Joined: Jan 2003 Posts: 4,049 Shelby Twp. Mi	Where are you measuring oil psi at and what oil filter are you using...It sounds like a check valve is stuck open. I would sort this out with a drill motor before you try starting it up again. JMO

Re: Bad pressure gauge? [Re: HardcoreB] #378326 07/20/09 08:48 AM 07/20/09 08:48 AM
Joined: Dec 2007 Posts: 830 east coast Otherlane OP super stock
Otherlane OP super stock Joined: Dec 2007 Posts: 830 east coast	I just have the fitting coming out of the top of the block and its a mopar filter.there is oil at the top of the engine Last edited by 428RR; 07/20/09 09:26 AM.

Re: Bad pressure gauge? [Re: Otherlane] #378327 07/20/09 08:56 AM 07/20/09 08:56 AM
Joined: Jan 2003 Posts: 4,049 Shelby Twp. Mi HardcoreB master
HardcoreB master Joined: Jan 2003 Posts: 4,049 Shelby Twp. Mi	Take the filter off and cut it open. Post your findings. Good idea for post break-in anyway. Try that first...then another filter and drill motor priming.

Re: Bad pressure gauge? [Re: HardcoreB] #378328 07/20/09 09:13 AM 07/20/09 09:13 AM
Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama M MRMOPAR622 top fuel
MRMOPAR622 top fuel M Joined: Sep 2003 Posts: 2,008 Sweet Home Alabama	HardcoreB, how would you check to see if a check valve was stuck open?Thanks "To Be The Man'You Have Got To Beat The Man" "T/D and Pro-Bracket Racer"

Re: Bad pressure gauge? [Re: Otherlane] #378329 07/20/09 09:14 AM 07/20/09 09:14 AM
A Anonymous Unregistered
Anonymous Unregistered A	Quote: I fired my engine up for the first time a 3 or 4 weeks ago after being on the dyno but i just hook up my pressure gauge with a new stainless braided line,my oil pressure jumps up to 70 pounds than fall straight to 0.Than if i start it up again the needle doesnt move.This is the first time using this gauge in 4 year.Do you think i need to replace the gauge or could there be something else wrong? try flushing the line out. it's possible you have a little piece of trash in there that blocks the tiny little hole at the guage. you might also check the reief valve in the pump to make sure it's not sticking and staying open. as mentioned, use a drill and priming rod instead of taking a chance on hurting the motor, just in case.

Re: Bad pressure gauge? #378330 07/20/09 09:37 AM 07/20/09 09:37 AM
Joined: Dec 2007 Posts: 830 east coast Otherlane OP super stock
Otherlane OP super stock Joined: Dec 2007 Posts: 830 east coast	I crank the motor over in the off postiton on the switch panel and oil comes out of the line that I connect to the gauge. I will get a priming tool until I know what is going on for sure.

Re: Bad pressure gauge? [Re: Otherlane] #378331 07/20/09 09:45 AM 07/20/09 09:45 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I crank the motor over in the off postiton on the switch panel and oil comes out of the line that I connect to the gauge. I will get a priming tool until I know what is going on for sure. I length of 5/16 hex stock from your local hardware store works fine for a priming tool, cut to desired length, some electrical tape around it where it goes through the bushing to protect the bushing.

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