12-17-2020 | #11 |
Join Date: Nov 2016
Location: New Brunswick
Posts: 960
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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 |
12-20-2020 | #12 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,178
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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) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
12-24-2020 | #13 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,492
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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 |
06-06-2021 | #14 |
Join Date: Nov 2016
Location: New Brunswick
Posts: 960
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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 |
06-06-2021 | #15 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,178
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Have you looked to signs on the top of the motor to see if it is starting there?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
06-06-2021 | #16 |
Join Date: Nov 2016
Location: New Brunswick
Posts: 960
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Any places in mind? I haven't noticed anything.
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
06-06-2021 | #17 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,178
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Front of motor behind the alternator or compressor. That will tell if it is breather box. On the ground where is the puddle? Many have issues with the sensors on the front right (oil adapter).
What has been looked at in the past for the leaks? What has been attempted as a fix?
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
06-06-2021 | #18 | |
Join Date: Nov 2016
Location: New Brunswick
Posts: 960
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
Quote:
I'll have a behind the Alternator. Looks to be right in the front of the engine. I can try to narrow it down.
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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06-06-2021 | #19 |
Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,178
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
You able to get under the car? Oil pan bolts could be loose
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1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Shelby Series 1 - Wilwood Brakes Custom Interior NCM Lifetime Member #978 |
06-06-2021 | #20 |
Join Date: Nov 2016
Location: New Brunswick
Posts: 960
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Re: I guess it wouldn't be a ZR-1 without an oil leak.
She will be up on a hoist on Friday too. I'll have that checked also.
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1990 ZR-1 # 996 "All Corvettes are red. The rest are mistakes." - John Heinricy |
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