Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
1 Week Ago
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Replies: 3
Views: 527
Re: WTB 1990 ZR-1 Factory Radiator Hose Clamps
Jerrys Gaskets
Found under Categories, Cooling System, page 2 of 2
https://www.jerrysgaskets.com/cooling-system/?sort=featured&page=2
Original clamps have OEM in the title name, follow up by...
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 43
Views: 13,453
Re: Engine noise- stuck lifter?
If I understand you correctly, the steel guide was loose from the Cam Cover?
https://cdn10.bigcommerce.com/s-nkg90o/products/297/images/1690/10110932_N__52640.1443363294.220.220.jpg?c=2
If so, I...
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 12
Views: 2,365
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Forum: C4 ZR-1 Technical Postings
4 Weeks Ago
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Replies: 43
Views: 13,453
Re: Engine noise- stuck lifter?
Camshaft Retainer Set also found here.
Can be rented or purchased outright. See ful description for details.
https://www.jerrysgaskets.com/tool-set-temp-cam-retainers-for-cam-timing-14b2/
...
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Forum: C4 ZR-1 General Postings
08-10-2024
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Replies: 10
Views: 2,090
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Forum: C4 ZR-1 Technical Postings
08-06-2024
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Replies: 43
Views: 13,453
Re: Engine noise- stuck lifter?
You are welcome.
Yes : https://www.jerrysgaskets.com/facing-top-guide-cam-cover-new-90-95-1f4/
Plastic:
Not much if the chain tensioner is working properly.
I don't think so, as long as...
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Forum: C4 ZR-1 Technical Postings
08-03-2024
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Replies: 43
Views: 13,453
Re: Engine noise- stuck lifter?
The video looks like the facing for the top chain guide (attached to the cam cover) has come loose, broken or detached. It is not a common thing but has happened before.
The Cam Cover has to...
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Forum: C4 ZR-1 Technical Postings
07-27-2024
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Replies: 3
Views: 1,307
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Forum: C4 ZR-1 General Postings
07-27-2024
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Replies: 12
Views: 2,795
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Forum: C4 ZR-1 Technical Postings
07-26-2024
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Replies: 43
Views: 13,453
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Forum: C4 ZR-1s and ZR-1 Parts For Sale/Wanted
05-21-2024
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Replies: 1
Views: 2,767
ECM For Sale
ECM For Sale
https://www.jerrysgaskets.com/ecm-ecu-engine-computer-module-used-90-95-10c4/...
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Forum: C4 ZR-1 Technical Postings
05-17-2024
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Replies: 2
Views: 3,274
Re: RH cam chain tensioner
Yes. Revised tensioner is aluminum, original is black painted steel.
Revised
https://cdn10.bigcommerce.com/s-nkg90o/products/834/images/1943/12500580__87908.1453238440.220.220.jpg?c=2
...
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Forum: C4 ZR-1 Technical Postings
05-01-2024
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Replies: 11
Views: 7,484
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Forum: C4 ZR-1 General Postings
04-11-2024
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Replies: 1
Views: 1,328
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Forum: C4 ZR-1 Technical Postings
04-02-2024
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Replies: 5
Views: 1,527
Re: Front Crank Seal
From Huntsville, AL, the closest professional shop for C4 ZR-1/LT5 service is in New Concord, KY. 233 miles ve 482.
Graham Behan, Lotus Engineer. 260-701-8860
Assigned to on-site at Mercury...
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Forum: C4 ZR-1 General Postings
04-01-2024
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Replies: 44
Views: 14,552
Re: Membership Renewal
I have a fair amount of experience, shipping ZR-1 LT5 parts now for about 16 years. I read you post and was totally in awe of your accomplishment...... 768 orders pulled, packed & shipped...... in...
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Forum: C4 ZR-1 General Postings
03-27-2024
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Replies: 11
Views: 2,220
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Forum: C4 ZR-1 Technical Postings
03-26-2024
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Replies: 12
Views: 3,153
Re: Oil leak
That could be. I was going under the premise you were working on a stock engine. The more information, the better the diagnosis.
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Forum: C4 ZR-1 Technical Postings
03-25-2024
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Replies: 12
Views: 3,153
Re: Oil leak
That would be unusual for sure.
There are two sources of leaks in that area, which are common.
1. Oil Pressure Switch. See the left side of the following photo. Remove the wiring connector &...
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Forum: C4 ZR-1 Technical Postings
03-18-2024
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Replies: 29
Views: 11,709
Re: Stranded on a road trip, '90 ZR-1, no crank
What is the rpm at which it would stay running and below which it would die?
When it stayed running, was it running smooth?
Did it run very rough right before it died?
Check your battery...
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Forum: C4 ZR-1 General Postings
03-18-2024
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Replies: 8
Views: 1,689
Re: Trust the seat of your pants
Charlie,
I had the same problem. Two different recommended, "supposedly good" alignment shops. Car was just not right. I put the ZR-1 up on my 4 post lift & used a couple of good, straight 2x4's...
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Forum: C4 ZR-1 Technical Postings
03-09-2024
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Replies: 12
Views: 3,153
Re: Oil leak
If it's coming from above the crank sensor, it may be the center exhaust manifold stud. If oil in that area, remove stud, clean & apply hi-temp silicone to threads, reinstall.
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Forum: C4 ZR-1 Technical Postings
02-28-2024
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Replies: 15
Views: 5,335
Re: Heater hose return fitting replacement
Try to remove the remaining bit still in the housing.
I have resolved problems like this by using a hacksaw blade to cut into the remaining band 2 or 3 places around. Then using a small chisel or...
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Forum: C4 ZR-1 Technical Postings
02-15-2024
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Replies: 4
Views: 3,514
Re: Timing chain popping after timing procedure
Normal occurance after timing cams AND after removing the manual chain tensioners.
As you rotate the cams via crankshaft, there comes a point where camshafts don't have very much tension from...
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Forum: C4 ZR-1 Technical Postings
02-02-2024
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Replies: 14
Views: 7,074
Re: Horsepower difference ?
Matt,
I don't think it's a common issue at all. As I understand catalyst reversion, it may occur when the engine is operating @ high rpm, throttle is closed and clutch is engaged. Think in terms of...
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