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Author
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Topic: Low oil pressure when WOT, ticking noise.
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30Tunes
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Member # 8105
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So i've been dealing with my car having low oil pressure but only at WOT. At idle its at regular operating pressure. Recently, I noticed when giving it gas the oil pressure drops dramatically and I also can hear the engine making a loud ticking noise. I was told the distributor might be going bad??? It's an MSD distributor and i've been reading nothing but bad reviews about these things. Any input??
[ 2013-09-19, 02:01 PM: Message edited by: 3-0-Tunes ]
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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BTLD GT
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Member # 5229
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vehicle info would help, so we know what were working on.
Daniel
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2000 Cobra R
Posts: 558 | From: livermore | Registered: Jan 2005
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30Tunes
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Member # 8105
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posted
93 mustang.
GT40 heads, 303 cam, bolt ons.
My oil pressure gauge works fine.
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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BTLD GT
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Member # 5229
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posted
are you relying on the factory dash gauge, if so i would verify with a manual gauge just to be sure. the only other things are a worn oil pump or a clogged pick-up screen.
Daniel
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2000 Cobra R
Posts: 558 | From: livermore | Registered: Jan 2005
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30Tunes
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Member # 8105
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posted
I'm pretty sure the gauge is working perfectly. When it drops is right when the ticking occurs. Should I rule out the distributor than??? I had a couple people tell me this is what controls the oil pump and when they start to go bad it can cause my symptoms.
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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BTLD GT
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Member # 5229
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posted
all the dist does is turn the pump and since you have oil pressure at idle sounds like its working. i would suspect a clogged oil pick up screen but could be a worn pump. either way gonna need to drop the oil pan to do either job.
Daniel
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2000 Cobra R
Posts: 558 | From: livermore | Registered: Jan 2005
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30Tunes
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Member # 8105
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Thanks Daniel. I appreciate your input. I'll be doing a engine swap soon so I'll make sure to check that and probably replace with a high volume pump
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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SLOWSN95
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Member # 8269
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quote:
Originally posted by 3-0-Tunes:
Thanks Daniel. I appreciate your input. I'll be doing a engine swap soon so I'll make sure to check that and probably replace with a high volume pump
If you're not turning high RPMs, there honestly is no point for a high volume oil pump. Oil pumps rarely go bad, but I would question whether or not the pickup is clogged. Good luck and full us in when you find the problem
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94' GT
347 Stroker
MM Suspended
2003 SB SVT Lightning
Pullied and Lowered
89'Hatch-SOLD
Posts: 2214 | From: 510/east bay | Registered: Mar 2008
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Tom Renzo
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Member # 13165
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For what it is worth and i do realize you guys do not know me. But we build engines in our shop. Now here is some advice i think you should know about Hi volume or high pressure pumps. NEVER EVER USE THEM IN ANYTHING. Especially in a 302. It will sheer off the DIZZY GEARS IN A HEART BEAT. Now most likely the PICKUP CLOGGED with the valve seals. On some of those engines they deteriorated and fell off and were picked up by the pump pickup. Or the engine is slugged at the bottom of the pan. VERY COMMON
[ 2013-09-19, 08:23 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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NK2186
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Member # 12319
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not to be blunt but have you checked the oil level at all? is the distributor gear worn? There are different types of distributor gears and if you use the wrong one you could have chewed it up.
Check your oil if you haven't and then pull your distributor and look at the gear on it and then look in the distributor hole at the cam gear. If all looks well drop the pan and find the problem.
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90 LX 5.0 - Stolen/stripped
89 LX 5.0 - Stolen and missing as of 7-24-13. LIC# 4HIP151 :(
99 Cobra
00 Exploder
Posts: 400 | From: Haystack | Registered: Aug 2012
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30Tunes
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Member # 8105
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I really appreciate all the replies. I have checked the oil, the level is fine. It does burn oil when I drive it hard but that doesn't seem to be the problem at this point. I would assume the pickup is clogged, or there is a substantial amount of sludge in the engine. I will check the dizzy but I'm almost certain its the oil pickup. I doubt it popped out which I have heard alot about. I also heard people make the mistake of just throwing the high volume in without making the proper modification (cutting the pickup shorter) causing the dizzy gear to be destroyed
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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diablounicorn
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Member # 13033
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its your pump or pick up stick, change both while you in there. i had the same problem with my car
Posts: 346 | From: San Diego | Registered: Jun 2013
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30Tunes
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Member # 8105
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posted
I'm going to run a flush on the engine. Hopefully this will eliminate most of the problem. If not, new oil pump it is. These are a pain in the ass to get out, is there a shortcut to getting around pulling the whole engine??
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Tom Renzo
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Member # 13165
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The shaft does not pop out that is impossible. They can round off i have only seen that once in my life. But you seem to be confused on the HI VOLUME PUMP. It has nothing to do with the pickup. It has to do with the load on the DIZZY GEARS. If you sometimes use to heavy an oil in cold climates the gears can strip. Always use a standard puimp and always let it worm up a min of 5 minutes before driving. And never get on it till it is completely wormed up. Pull the K frame instead of the engine.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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30Tunes
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Member # 8105
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Actually the pickup can pop out....It's happened before to my brother in laws built mustang. Stripped it right off of the oil pump. And what I meant by modifying the pump is the pickup tube. It needs to be cut shorter. Read up on it
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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CHP2981
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Member # 9240
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I've changed two engines relying on the dam dash gauge.
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No half steppin
Posts: 521 | From: Richmond | Registered: Jun 2009
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4IDFOX
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Member # 9921
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posted
There are a couple other things that can cause this.
One of the 3 plugs in the block behind the cam gear may have popped.
One of the main webs in the block could be cracked and as the rpm's go up the clearance of the main bearings gets larger causing oil pressure to go down. It won't be long before there will a Big Bang if this is the case. Wich has been my experience.
The reason one would have to cut an oil pump drive shaft is due to the different length of dizzy's. later dizzy's are longer than the early dizzy's. oil pumps generally do not affect drive shaft length.
[ 2013-09-21, 03:43 PM: Message edited by: 4IDFOX ]
Posts: 375 | From: Redding CA | Registered: Apr 2010
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Tom Renzo
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Member # 13165
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I am lost for words and what would shortening the pickup have to do with a High volume pump. This fascinates me to death. So please explain this i am fascinated over this. I dont even use High Volume pumps when i install HONDA SQUIRTERS in an engine
[ 2013-09-22, 03:23 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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Tom Renzo
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Member # 13165
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If one of the lifter GALLIE plugs came out the lifters would not get oil and the lifters would COLLAPSE. I have seen this personally when guys forget to install them at a rebuild. Cracked block ABSOLUTELY POSSIBLE. The 302 is known for this but normally not on a stock engine. Normally when a crack develops you loose pressure at idle and low RPM. As RPM rises the pressure normally goes up. This is my experience Just Saying!!
[ 2013-09-21, 04:19 PM: Message edited by: Tom Renzo ]
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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H8RPWRD
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Member # 12588
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posted
This happened to me my shaft turned into a twizzler
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89 Lx Vert
93 LX Notch- sold
01 Bullitt #00919- Sold
90 LX- Sold
89 LX Vert- Sold
89 LX (DarkHorse)-Sold
Posts: 1330 | From: Hayward | Registered: Dec 2012
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H8RPWRD
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Member # 12588
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My oil pump seized up when my brother was driving it. I got home and he told me that my engine was ticking if I had a better oil pressure gauge I probably would have caught it earlier.
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89 Lx Vert
93 LX Notch- sold
01 Bullitt #00919- Sold
90 LX- Sold
89 LX Vert- Sold
89 LX (DarkHorse)-Sold
Posts: 1330 | From: Hayward | Registered: Dec 2012
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30Tunes
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Member # 8105
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posted
LOL! Damn Chuck, that's crazy
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Tom Renzo
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Member # 13165
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posted
The twisted drive shaft is common on fords. As i pointed out the valve seals deteriorate and clog the pickup. Some of the material can make it,s way in to the pump and seize it solid. Then the shaft will turn in to a twizzler as you posted.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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4IDFOX
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Member # 9921
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I have seen a drive shaft look like that in a brand new motor with less than 2 hrs run time. A buddy of mine made 2 mistakes. HV pump and a stock drive shaft. This was in a road race motor that lived at 4500-7000 rpm's for 20 - 30 minutes at a time. It didn't last long.
Two good rules to live by, no HV pumps and no stock drive shafts in anything.
Posts: 375 | From: Redding CA | Registered: Apr 2010
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Tom Renzo
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Member # 13165
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TRUE but once the pump seizes up there is serious issues. I never install a pump without completely going over it and grind in reliefs in the cover. The clearances may be off and that has to be checked. Using a stock shaft is fine as the only reason it twists out is because the pump locks up. If you increase the strength of the shaft it will break the gears on the cam or the DIZZY. Either way if a shaft spins out it is not because the shaft is to WEAK. Using a HI VOLUME PUMP is just asking for trouble and is totally not needed. We have found that having more pressure over 40-45 LBS @ 5000 RPM is totally adequate. As the matter of fact oil pressure takes HP. The higher it is the more it takes away from the engine.
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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