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01-10-2014, 04:32 PM
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#1 |
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Registered User
 
Join Date: Sep 2013
Location: Sassafras. Victoria. The beautiful Mount Dandenong Ranges
Posts: 234
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engine oil pressure.
G'day. I have recently fitted a 402 bb. Its done a little over a thousand kilometres and was running sweetly. Coming home one night it starts making a light "tappety" noise. I check the oil pressure gauge and have no pressure, thats is I have no pressure under acceleration. At idle pressure reads about 40-50 psi. If I throttle on the pressure drops to zero. Whsn running right it was showing about 80 psi.. Does anyone have any suggestions as to whats goin on?
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01-10-2014, 04:35 PM
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#2 |
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Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,245
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Re: engine oil pressure.
Sounds like the pump pick up screen may have fallen off
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
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01-10-2014, 04:42 PM
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#3 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: engine oil pressure.
Flat tappet cam? If so... pull your valve covers and check for loose rocker arms. If it is the cam going flat on a couple of lobes... you will have a tremendous amount of metal particles in your oil that can kill an oil pump and bearings. Not tryin' to scare ya... but the "tappety" noise is usually a lifter eating it's way into the cam and the rocker arm is clacking on the valve stem and push rod.
Gary
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01-10-2014, 04:43 PM
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#4 |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: engine oil pressure.
x2 on the dropped pickup. it also could be a high volume pump running the sump dry.
Drain the oil. Reach in and wiggle with a cut clothes hanger or piece of stiff wire and see if you can hear the pump pickup rattle around in the pan.
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1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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01-10-2014, 04:48 PM
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#5 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: engine oil pressure.
You guys got me while I was typing and thinking (dangerous thing to do lol). I agree that it could be a pickup as well.
 Gary
__________________
'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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01-10-2014, 05:02 PM
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#6 |
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Registered User
Join Date: Sep 2013
Location: Sassafras. Victoria. The beautiful Mount Dandenong Ranges
Posts: 234
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Re: engine oil pressure.
We have dropped the sump and checked the pump and pickup. All good there but we did findmetal particles Iin the oils. This motor was allegedly refreshed and re-ringed with slightly lumpier cams put in.
I apologize for the crappy spelling but I'm trying to do this on my phone wigh fat fingers! |
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01-10-2014, 05:09 PM
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#7 |
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Registered User
Join Date: Sep 2005
Location: Canton North carolina
Posts: 3,080
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Re: engine oil pressure.
Spun bearings, motor needs to be pulled.
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67 blue step side- bb 68 gold and white swb cst anniversary 68 custom swb hot rod Ls swap 69 swb cst 6 cylinder/ overdrive 69 black/black cst bb swb 70 orange and white cst Canada built truck swb bb 71 black and white super swb bb 71 red and white super swb 72 green and white super swb 4x4 62 nova wagon 400 series Ls swapped 68 Camaro 327/4 speed- 1 owner, original paint 66 Volkswagen bettle 69 auto stick Volkswagen Beetle |
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01-10-2014, 06:57 PM
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#8 | |
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Registered User
Join Date: Dec 2012
Location: Chandler AZ
Posts: 1,149
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Re: engine oil pressure.
Quote:
__________________
1970 Longhorn, Front Disc, 350/4 bolt, 882 heads, HEI, Edelbrock, 700R4, HO-52/4.11. 1996 Corvette, Collector Roadster, LT4, 396, 450RWHP, 6sp, 4.11/Dana44/posi 5 point roll bar And let us not grow weary of doing good, for in due season we will reap, if we do not give up. Gal 6:9 |
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01-10-2014, 08:34 PM
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#9 |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: engine oil pressure.
Aussie Ol' Blue ...
 to the forums and  from Ohio 
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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01-10-2014, 09:25 PM
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#10 |
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Registered User
Join Date: Sep 2013
Location: Sassafras. Victoria. The beautiful Mount Dandenong Ranges
Posts: 234
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Re: engine oil pressure.
Thanks 70cst!
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01-10-2014, 09:27 PM
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#11 |
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Registered User
Join Date: Sep 2013
Location: Sassafras. Victoria. The beautiful Mount Dandenong Ranges
Posts: 234
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Re: engine oil pressure.
Thanks 70cst
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