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The gods hate me..... 0 oil pressure reading on the way home in the 67

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dodgestang

Active Member
Drive the 67 for 124 miles today. Halfway home (or at the 94 mile mark) while sitting at the red light I noticed the oil pressure gauge was reading zero.

I flip it into neutral and throttled up a little and the pressure goes up with a little RPM

I'm kinda worried. I'm going to drain the oil this weekend and see if it has anything extra shiny in it and put new oil in it and pray for the best. I didn't hear any obvious knocking sounds or anything but I never have any luck.
 
hopefully it's just the gauge, at zero pressure you would here something rattling around and see a temp gauge rising.
 
Nick,
What have you been recently eating? Sounds like a bowl of bad Karma Oats. Hopefully it is just the sending unit.
 
I swear I have not been close to being in the NE/Atlantic Coast area since mid-January!
 
"Midlife" said:
I swear I have not been close to being in the NE/Atlantic Coast area since mid-January!
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Maybe not but you must have left your Mustang problems there......

Check your connections also. I had one on one '66 that would move in the wind while driving...get to speed and low but variable pressure, slow down, plenty of pressure....
 
My gauge was reading low for a long time. I replaced the sender and cleaned the connection and it reads normal now.

Remember that, Mike? Coming home from Knotts a few years ago?

Frank
 
Damn! I thought I was the resident bad luck holder. You trying to muscle in on my engine woes?
 
"70_Fastback" said:
First off, is it a mechanical gauge or an electronic?
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It's the stock gauge...so obviously somewhat inaccurate from the get go....but using it as a marco indication of engine oil pressure....for 3.5 years it was always in one spot...and then today it dropped all the way to left past the 'L' when sitting idling and then moved back up to its normal spot as soon as I tached up to about 1000 rpm.
 
"silverblueBP" said:
Damn! I thought I was the resident bad luck holder. You trying to muscle in on my engine woes?
Click to expand...

I have had the market cornered on bad luck for just over a decade now when it comes to mustangs. I'm the only one that midlife ever actually cursed and I've been suffering ever since. Why did I ever install that damn AIM client on my PC in 2001
 
I've had that happen with my mechanical gauge the last 2 times the engine spit out a lifter.
 
Did you recently changed from brand or viscosivity ??
Maybe when the oil is very very hot , she is so thin that the oilpump can't make that presure anymore at idle.
My 0.02 opinion.
 
If it reads zero (like the gauge is completely dead) then it's probably a gauge issue.

I had that happen to me a while back driving into the parking garage at work. Looked down and literally sub-zero oil pressure according to the gauge.

Turns out the sending unit was bad, which kind of ticked me off since it was a pretty much new sending unit with maybe 500 miles on it. We installed it at the same time as the new motor.

My sending unit was so bad though that it was leaking oil out of the top of it around the rubber part behind / under where the wire plugs in.
 
So I managed to get the 65 off the lift today.
Put the 67 on the lift...drained the oil, changed the filter, filled it up with 5 quarts new stuff (took me 5 minutes to do unlike the 65 which took over an hour because the filter refused to come off).

Looked at the oil, nothing in it but blackness, very very deep and dark blackness.

Fired it up.....oil pressure right where it should be. Let it idle for a good long while. No noises, good pressure. Looks like I got lucky.
 
Glad to hear it's ok. I had a low pressure oil situation shortly after I had rebuilt the current engine in my car. After about 2 months, I got ZERO oil pressure. no knocks, clatter, nothing, just no oil pressure.

Turns out the plug on the front of the engine near the cam blew out (high pressure oil pump - replaced with high volume). Scared me for a whjle but I did drive the car for about 2 months with no oil pressure on the guage.
 
"dodgestang" said:
So I managed to get the 65 off the lift today.
Put the 67 on the lift...drained the oil, changed the filter, filled it up with 5 quarts new stuff (took me 5 minutes to do unlike the 65 which took over an hour because the filter refused to come off).

Looked at the oil, nothing in it but blackness, very very deep and dark blackness.

Fired it up.....oil pressure right where it should be. Let it idle for a good long while. No noises, good pressure. Looks like I got lucky.
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Changing the oil and filter "fixed" the problem? I wouldn't be 100% convinced and would continue to monitor. Unless the viscosity of the removed oil was comparable to water, changing the oil and filter should have little effect on your oil pressure. Take another 94 mile drive. :confu
 
"daveSanborn" said:
Changing the oil and filter "fixed" the problem? I wouldn't be 100% convinced and would continue to monitor. Unless the viscosity of the removed oil was comparable to water, changing the oil and filter should have little effect on your oil pressure. Take another 94 mile drive. :confu
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It was also 1.5+ quarts low. But yes......not taking another 126 miles drive with it until I have run it around town several times up to operating temp and sat at idle for a few moments.
 
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