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12-09-2020
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#1 |
 Join Date: Nov 2016
Location: New Brunswick
Posts: 939
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I guess it wouldn't be a ZR-1 without an oil leak.
Parked inside since the weekend, and I took a look at her today. Found a nice puddle under the front of the engine. It already has Jerrys oil cooler lines, so I doubt it is that. Was pretty dark too, so I'll have to check again in the AM.
Only thing I can imagine is engine oil, or PS fluid?
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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12-09-2020
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#2 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,691
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Check oil pump access cover and cam sensor seal. I had both happening at the same time.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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12-09-2020
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#3 | |
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Join Date: Nov 2016
Location: New Brunswick
Posts: 939
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Quote:
Are they easily repairable, or is it a special part required, otherwise known as another Jerrys order?
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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12-09-2020
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#4 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Passenger side?
H 
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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12-09-2020
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#5 | |
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Join Date: Nov 2016
Location: New Brunswick
Posts: 939
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Quote:
I'll know more tomorrow. What's on the passenger side?
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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12-09-2020
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#6 | |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,710
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
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On top of oil filter housing - oil pressure sensor Right side of filter housing facing down - low oil pressure warning sensor Under and behind low oil pressure sensor - cam chain tensioner port Above oil pan - crankshaft sensor Under the crankshaft sensor, on the oil pan - low oil level sensor Of course, oil pan gasket can be a source of oil leak also. Oil leak can be any of above or combination of above locations. |
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12-17-2020
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#7 |
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Join Date: Nov 2016
Location: New Brunswick
Posts: 939
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Been cold, snowy and miserable, so I finally got out today to take a look at her. I had put a fresh piece of cardboard underneath to get a better feel for where the leak was, and how much was leaking.
So what did I find today? Yup, a completely dry piece of cardboard. Not a drop on it. Great.
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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12-20-2020
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#8 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,146
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
I had I leak on my car since I got it..
I found the Breather box bolts loose, and the gasket was hard as a rock, replaced the gasket and used blue loctite on the bolts.. I thought it was fixed, but leak was still there, but less. For me it ended up being the Crank Sensor.. Now the car currently does not leak
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978 |
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12-24-2020
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#9 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
I agree w/ Jeff.
 Just to add: in my case the injector housing bolts too were not anywhere near torque spec. If you have oil in the valley, chances are it is either the breather box (as Jeff said) OR those IHs. New gaskets and some BLUE LOCTITE on the bolts will solve those issues! (Be sure to use the (FSM) torque sequencing on the IHs
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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06-06-2021
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#10 |
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Join Date: Nov 2016
Location: New Brunswick
Posts: 939
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Oil leak has gone from a handful of spots under the car to a nice puddle now. Going to sickbay on Friday for a checkup. I'll definitely give everyone's comments to him to help narrow it down.
The oil was down a quart and change, so I topped it up, and the leak seemed to get bigger. Does that suggest any specific spot to look at?
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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