oil pressure at. idle

1989Gt. · December 10th, 2011, 07:32 PM

Another quick question is i was using a normal pressure gauge rated to 200psi would this be ok it wasnt liquid filled or anything. Im not sure if that will have a different reading tho.

1989Gt. · December 11th, 2011, 06:47 PM

Originally Posted by MustangMatt96GT

Stop driving the car, pull the engine out and put new bearings in it...

Did you check clearances when you built it?

I just replaced and rebuilt my engine....

Tang Stang · December 12th, 2011, 08:26 AM

Originally Posted by 1989Gt.

where could i be losing it?

A bearing that is out of tolerance, a missing plug on any of the oil galleys, a bad spring in the oil pump, etc.

Originally Posted by 1989Gt.

Another quick question is i was using a normal pressure gauge rated to 200psi would this be ok it wasnt liquid filled or anything. Im not sure if that will have a different reading tho.

Gauges are liquid filled just to dampen vibration. It may slow the needle slightly, but it doesn't have a great effect on accuracy here, and it isn't an issue in this case.

I know it isn't what you want to hear, but something isn't right inside your engine. I'd highly recommend tearing it down and finding the issue before it starts making shavings out of the bearings.

1989Gt. · December 12th, 2011, 03:40 PM

Originally Posted by Tang Stang

A bearing that is out of tolerance, a missing plug on any of the oil galleys, a bad spring in the oil pump, etc.

Gauges are liquid filled just to dampen vibration. It may slow the needle slightly, but it doesn't have a great effect on accuracy here, and it isn't an issue in this case.

I know it isn't what you want to hear, but something isn't right inside your engine. I'd highly recommend tearing it down and finding the issue before it starts making shavings out of the bearings.

Ok i understand what your saying im going to be taking the cover off cause i dont think its any of my bottom end bearings because all my tolerances were good. I replaced my pump too could something be bleeding the pressure at all?

Tang Stang · December 12th, 2011, 03:44 PM

You didn't use plastigage to determine your tolerances, did you? As far as what could cause the loss of pressure, I mentioned the possible causes in my previous post.

1989Gt. · December 12th, 2011, 06:10 PM

No plasigauge lol No no a buddy of my dads put this together with me and i cant rememher off hand what it was exactly but they were all pretty much matching identically i know that.

I know they were all tight. I really doubt its the bottom end tho its not making a dang sound i was thinking would my tension-ers be bleeding off pressure?

Tang Stang · December 13th, 2011, 08:46 AM

I can't see the tensioners being the culprit, unless the bolts attaching them to the block weren't torqued to spec. If the bearing tolerances were indeed within spec, then I'd lean towards a missing oil galley plug or an issue with the oil pump. Which oil pump did you go with?

1989Gt. · December 13th, 2011, 03:18 PM

Originally Posted by Tang Stang

I can't see the tensioners being the culprit, unless the bolts attaching them to the block weren't torqued to spec. If the bearing tolerances were indeed within spec, then I'd lean towards a missing oil galley plug or an issue with the oil pump. Which oil pump did you go with?

I went with the ford racing high volume cobra pump, Where are the plugs at? What about the heads somewhere in there could i be leaking or something?

December 10th, 2011, 07:32 PM	#61
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	Another quick question is i was using a normal pressure gauge rated to 200psi would this be ok it wasnt liquid filled or anything. Im not sure if that will have a different reading tho. __________________ MM FOBRA CLUB MEMBER #1

December 12th, 2011, 03:44 PM	#65
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	You didn't use plastigage to determine your tolerances, did you? As far as what could cause the loss of pressure, I mentioned the possible causes in my previous post. __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

December 12th, 2011, 06:10 PM	#66
1989Gt. Hardcore Enthusiast 1989 Mustang GT Join Date: Apr 2008 Posts: 2,799 iTrader: 0 reviews	No plasigauge lol No no a buddy of my dads put this together with me and i cant rememher off hand what it was exactly but they were all pretty much matching identically i know that. I know they were all tight. I really doubt its the bottom end tho its not making a dang sound i was thinking would my tension-ers be bleeding off pressure? __________________ MM FOBRA CLUB MEMBER #1

December 13th, 2011, 08:46 AM	#67
Tang Stang Hardcore Enthusiast 2004 Mustang GT Join Date: Sep 2010 Location: Imperial, MO Posts: 1,961 iTrader: 2 reviews	I can't see the tensioners being the culprit, unless the bolts attaching them to the block weren't torqued to spec. If the bearing tolerances were indeed within spec, then I'd lean towards a missing oil galley plug or an issue with the oil pump. Which oil pump did you go with? __________________ Rod @ AzzKicker Cars 2004 Ford Mustang GT-The Driver-BBK CAI, PP TB & Inlet, Steeda UD's, SLP LM1, & 3.73's. 1990 Mercury Cougar XR7-The Meth Addict-5.0L DOHC Stroker w/2.1L KB SC. 1995 Ford F150-Mud Toy-5.0L, 4x4, 33's, & Warn 8274 Winch

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