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03-25-2002, 09:43 PM
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#1 |
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72 Cheyenne
Join Date: Oct 2001
Location: San Diego
Posts: 2,086
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Oil Pressure Problem
Well the rebuilt has been in for a week now, it runs and sounds great but today only while on the Freeway at high speed the Oil Pressure sometimes drops WAY down and right back up again, it happend four or five times in a ten min period, any ideas?
------------------ Restored 72 Cheyenne C20 San Diego, CA |
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03-25-2002, 09:46 PM
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#2 |
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Registered User
Join Date: Feb 2002
Location: Greene, Iowa
Posts: 150
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somtimes assembly lube can do a number on your oil filter try changing the oil and filter and tell us if it worked
most of the time it reads a steady low pressure but i thought i would mention it anyhow
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70 3/4 ton 4x4 FOR SALE Greene, IA |
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03-25-2002, 09:47 PM
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#3 |
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Registered User
Join Date: Mar 2002
Location: Ohio
Posts: 135
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Are you running a mechanical guage?? I had problems with the factory one and switched to a triple gauge Sunpro. No fluctuations since. Good luck!
------------------ 67 Chevy C20 LB Stepside, 350 4-bolt with goodies.
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'94 GMC Seirra Ext. Cab '67 Formula Firebird '89 GSX-R 750 |
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03-25-2002, 09:56 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Dumb question here, you have checked the level haven't you?
I'd change it too. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. Need to pick up the one ton Longhorn with a PONTIAC 350/350soon. Thanks every one!  Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio |
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03-25-2002, 10:10 PM
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#5 |
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72 Cheyenne
Join Date: Oct 2001
Location: San Diego
Posts: 2,086
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We just changed the oil a couple of days ago, I checked it and it's good. They ran it with a gauge and it was fine, I'm thinking it's the factory gauge just jumping around, I hope.
------------------ Restored 72 Cheyenne C20 San Diego, CA |
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03-26-2002, 10:40 AM
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#6 |
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72 Cheyenne
Join Date: Oct 2001
Location: San Diego
Posts: 2,086
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ttt
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03-26-2002, 02:06 PM
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#7 |
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Registered User
Join Date: Jul 2000
Location: Victoria,BC, Canada
Posts: 1,300
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I had the same thing happen after I tore down my 402 and put in a new cam. Scared the crap out of me. I have to assume it was rtv sealant or assembly lube in the gauge line or something like that.
------------------ 71 GMC 2500 Custom Camper 71 GMC Suburban 1500 Super Custom 71 Chevrolet 1500 Donor http://www.able-bravo.com
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71 GMC 1500 LWB |
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03-26-2002, 02:18 PM
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#8 |
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Just an Old Mr Goodwrench
Join Date: Feb 2002
Location: Green Ridge, MO USA
Posts: 259
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I switched engines a couple of years ago and ever since my oil guage goes off the scale at start up - only to run "normal" after warm-up. Factory guages do strange stuff! Lee
------------------ 1969 Custom 20 Longhorn 1970 CST 20 Fleetside 1950 Plymouth Special Deluxe 1991 Jaguar Sovereign 1992 Mazda Miata 1969 Triumph Bonneville 1964 Harley Sportster
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1969 CST 20 Longhorn 1970 CST 20 Fleetside 1991 Jaguar Sovereign 1992 Mazda Miata |
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03-26-2002, 02:52 PM
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#9 |
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huh?
 
Join Date: May 2000
Location: Washington, Illinois
Posts: 5,692
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Yeah, my factory gauge with the old 350 went way past the High pressure line at startup, and would sit there pegged until warm up, then it would go all the way down and the needle would sit on the "L" Line, when I finally got a cheap aftermarket gauge, I had about 2 lbs of psi at hot idle in gear...pretty good huh? LOL
 I recommend buying a cheap little wal mart Oil psi gauge and installing it under the dash for the time being, to see if perhaps the factory gauge is just being odd, anything is possible.------------------ 68 SWB S/S, 406 sb (the Mighty Mouse), 660 Holley, Computer Dyno'd at about 330 HP, and 385 LB. FT. of torque,Vette Exhaust Manifolds, Torker 2 intake, TH350, baby blue/red oxide primer, Gridley, IL tjharvey68@hotmail.com I'm on MSN messenger under that address if you would like to add me...... Also on AOL IM under the nick tommy85z My Personal Homepage The 67-72 gallery on MSN, feel free to submit your pics! A pass-time of mine is storm spotting, click here to see Gridley IL's Emergency Services Homepage. AOL SN- Tommy85z
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Someday when I'm lonely, Wishing you weren't so far away, Then I will remember Things we said today. RIP El Jay |
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