Forum: C4 ZR-1 Technical Postings
07-10-2024
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Replies: 1
Views: 8,762
Oil Leak - Breather Box
Noticed I was leaving a spot of oil on the garage floor.
Got underneath and figured out it was leaking from the rear of the Engine.
Specifically, seemed to be coming down the drain tube at the rear...
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Forum: C4 ZR-1 Technical Postings
05-28-2024
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Replies: 44
Views: 31,833
Re: Engine noise- stuck lifter?
Useful when troubleshooting to be able to prove things out quickly so the true issue can be found.
I can?t comment on lifters or chain tensioners so I?ll leave that to more qualified folks here.
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Forum: C4 ZR-1 Technical Postings
04-24-2024
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Replies: 2
Views: 11,416
Re: HVAC control unit issues
Same here, I used this kit: https://batee.com/collections/1990-1996-corvette-parts/products/90-96-c68-ecc-ac-hvac-restoration-kit
Sent from my iPhone using ZR-1 Net Registry...
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Forum: C4 ZR-1 Technical Postings
04-21-2024
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Replies: 1
Views: 11,276
Reinforcement Spring in Engine Coolant Hose?
I've got my car torn apart to replace the old (original??) coolant hoses with new silicone hoses from JerrysGaskets.
What's the latest consensus on the reinforcement spring in the Engine Coolant...
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Forum: C4 ZR-1 Technical Postings
11-28-2022
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Replies: 5
Views: 12,778
Re: Alternator R/R-Gaskets
No need to remove the plenum for alternator R/R. Sure, there?s more room if you do pull the plenum, but its do-able without.
Just need to pull the throttle body extension (air horn) and oil...
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Forum: C4 ZR-1 Technical Postings
09-08-2022
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Replies: 5
Views: 7,642
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Forum: C4 ZR-1 Technical Postings
09-08-2022
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Replies: 5
Views: 7,642
Wheel Compatibility with GS Brakes
Thinking about wheels for a '91.
Currently I have reproduction A-molds with non-ZR-1 offsets in the rear.
Front brakes have been changed to Grand Sport calipers (before I bought the car so...
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Forum: C4 ZR-1 Technical Postings
08-09-2022
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Replies: 9
Views: 13,207
Re: 90Z won't start
Lots of detail to be found here:
http://www.zr1specialist.com/HAT%20Web/articles/Diagnosing%20Starter%20Problems.pdf
If the voltmeter isn't dropping, it might be worth shorting the clutch...
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Forum: C4 ZR-1 General Postings
06-01-2022
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Replies: 10
Views: 3,084
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Forum: C4 ZR-1 Technical Postings
08-12-2021
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Replies: 24
Views: 3,691
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Forum: C4 ZR-1 Technical Postings
08-05-2021
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Replies: 18
Views: 3,729
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Forum: C4 ZR-1 Technical Postings
08-05-2021
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Replies: 4
Views: 951
Re: Clutch Replacement in MI?
Thanks for the replies - I agree, best to err on the side of caution and get this dealt with relatively quickly, rather than drive it and create more of an issue later on.
Bob - I guess I've...
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Forum: C4 ZR-1 Technical Postings
08-03-2021
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Replies: 4
Views: 951
Clutch Replacement in MI?
Clutch is slipping under high-ish loads in my Z (i.e. 4th gear from 40mph full throttle). Seems OK for daily-driving, but not sure for how long.
Any suggestions for places to go for clutch...
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Forum: C4 ZR-1 Technical Postings
07-22-2021
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Replies: 18
Views: 3,729
Rough Running - Ignition Coil out?
Fair question. I?ll admit the injectors were installed prior to me owning the car, so I?m running a bit on hearsay when I say they are Bosch, also I?m not sure of what was involved in the...
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Forum: C4 ZR-1 Technical Postings
07-11-2021
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Replies: 18
Views: 3,729
Re: Rough Running - Ignition Coil out?
Thanks for the tips, Young1. :cheers:
To wrap things up here, the car is back together and running smooth once again. Some things I noticed during this process:
Next time I'll make sure...
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Forum: C4 ZR-1 Technical Postings
06-13-2021
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Replies: 18
Views: 3,729
Rough Running - Ignition Coil out?
Out driving this morning and all of a sudden the car (1991) changed character pretty severely under load. Sounded much more boomy (low frequency) and felt like it was missing. Got home and idle was...
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Forum: C4 ZR-1 Technical Postings
07-23-2019
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Replies: 0
Views: 568
HVAC issues after Full Throttle
Anyone have issues with the climate control system acting strange after heavy throttle application?
I've had the system go from Off to Auto, show me the outdoor temp is 170F (ouch!), or reset...
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Forum: C4 ZR-1 Technical Postings
07-13-2018
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Replies: 28
Views: 5,409
Re: Vette2Vette No Flex Install
Thanks for this post. I’ve been on the fence, but I think I’ll be bumping these up toward the top of my list.
Sent from my iPhone using ZR-1 Net Registry (http://r.tapatalk.com/byo?rid=90383)
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Forum: C4 ZR-1 Technical Postings
07-12-2018
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Replies: 5
Views: 1,072
Re: A/C-related Squeal (Belt?)
Aha. I think I remember having the 80.5 at some point. I'll double-check what's on the car and what my spare is. Thanks for the tip.:cheers:
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Forum: C4 ZR-1 Technical Postings
07-12-2018
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Replies: 5
Views: 1,072
A/C-related Squeal (Belt?)
Hi All -
I've noticed that when I first turn the A/C on, I get a squealing noise when I start to drive. Usually only lasts for the first 50ft or so. Most obvious in 1st or Reverse as I let...
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Forum: C4 ZR-1 Technical Postings
07-10-2018
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Replies: 5
Views: 1,078
Re: 1994 water pump replace advice
Pay attention to the bolt locations. There are a lot of different bolts on these things, so I used a cardboard template to keep track of each one’s position.
On the coolant refill, it might be...
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Forum: C4 ZR-1 General Postings
07-01-2018
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Replies: 1
Views: 449
CT Throttle Body Plate
Finally got around to installing the plate from Carter. When the new LT5 came out, I thought it was strange that ours wasn’t labeled. Easy fix.
7762
Sent from my iPhone using ZR-1 Net...
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Forum: C4 ZR-1 Technical Postings
06-17-2018
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Replies: 5
Views: 1,299
Re: Headlight motors keep going after switch off
Sounds like the headlight motor bushings. It is a somewhat common C4 ailment. I used this YouTube video to walk me through the repair process. Some people replace the gears as well (sometimes with...
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Forum: C4 ZR-1 Technical Postings
05-18-2018
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Replies: 15
Views: 1,930
Re: Alternator
Ah, yes. Throttle body remove would make it so you wouldn't have to remove the oil sender. Probably makes it easier to access behind the alternator for (+) terminal too. Many ways to skin this one ;)
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Forum: C4 ZR-1 Technical Postings
05-18-2018
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Replies: 15
Views: 1,930
Re: Alternator
I'm with you on this one. I've got a step-by-step with needed tools here:
http://www.zr1.net/forum/showthread.php?p=248848
Sent from my iPad using ZR-1 Net Registry...
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