Forum: C4 ZR-1 Technical Postings
07-16-2024
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Replies: 4
Views: 10,647
High Pitch Whine or Squeal at Start-Up
1995 ZR1 with 10,000 miles - all original. I'm hearing a high pitch whine or squeal at start-up and first few minutes until the engine is warm. The idler pulley was rebuilt by Marc, and all the other...
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Forum: C4 ZR-1 Technical Postings
03-16-2024
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Replies: 2
Views: 5,857
Oil Gauge Issue
I have a '95 ZR1 with about 10,000 miles which I recently purchased. The oil gauge is normally runs just below 80 PSI on the gauge at about 2500 RPMs, but at times the gauge drops and reads about 40...
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Forum: C4 ZR-1 Parts For Sale / Wanted
03-16-2024
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Replies: 2
Views: 1,880
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Forum: C4 ZR-1 Technical Postings
03-10-2024
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Replies: 2
Views: 8,930
Oil Pressure/Gauge Question
I just purchased a '95 and have a question. My oil gauge reading almost 80 PSI at start-up and during an extended drive it sometimes reads about 45 PSI (slightly past the center mark on the gauge)...
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Forum: C4 ZR-1 Parts For Sale / Wanted
03-04-2024
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Replies: 1
Views: 1,678
WTB: Fuel Pump/Sender Module
WTB: I want to purchase a NOS GM fuel pump/sender module, part number 19180770. Please contact me at 804.405.2181. Thanks.
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Forum: C4 ZR-1 Technical Postings
03-04-2024
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Replies: 1
Views: 11,597
Rear Differential Torque Spec
I have a '95. What is the torque spec for the differential cover/bat wing where it mounts to the car frame (the side bolts)? Thanks.
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Forum: C4 ZR-1 Parts For Sale / Wanted
02-21-2024
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Replies: 3
Views: 1,707
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Forum: C4 ZR-1 Parts For Sale / Wanted
02-21-2024
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Replies: 3
Views: 1,707
WTB: C4 Gas Tank 14048936
I'm looking for a NOS GM gas tank for my '95 ZR-1, GM Part number 14048936. Please contact me if you have one.
Thanks.
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Forum: C4 ZR-1 Technical Postings
02-16-2024
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Replies: 13
Views: 19,098
Rear Differential Gear Swap
I'm planning to swap out my stock 3.45 gears for a 3.91 and have a question. Does the stock differential carrier work with any gear set? I'm hoping to avoid replacing my stock posi carrier.
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Forum: C4 ZR-1 Parts For Sale / Wanted
02-10-2024
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Replies: 0
Views: 1,011
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Forum: C4 ZR-1s for Sale / Wanted
02-06-2024
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Replies: 15
Views: 6,355
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Forum: C4 ZR-1 Technical Postings
01-15-2024
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Replies: 0
Views: 9,175
Spark Plug Wires
Does anyone have a picture of the original spark plug wire routing and retainer clips? I have a 1995 service manual but the manual does not show the position of the retainer clips.
Thanks.
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Forum: C4 ZR-1 Technical Postings
01-07-2024
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Replies: 4
Views: 10,698
Oil in Plenum
I have a '95 with 9,500 miles and just pulled the plenum. There was oil residue in the runners and oil also drained from the PCV port in the plenum. All the hoses are original, and the PCV hoses...
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Forum: C4 ZR-1 Technical Postings
12-31-2023
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Replies: 4
Views: 8,951
Oil Filter Question
I have three ACDelco PF970 (no C) filters (blue). They are new, in the box and in good shape. They must be 20+ years old. Any issues in using them?
Thanks.
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Forum: C4 ZR-1 Technical Postings
12-30-2023
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Replies: 2
Views: 7,834
Leaking Pinion Seal
I just purchased a '95 (white/black) with 9,200 miles. Drove it home from the dealership and the rear pinion seal is leaking. I believe 4:10 gears were installed at some point. The dealership shop...
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