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Corvette
C4 Forum
Saving a 90 ZR-1 in hibernation 20yrs. Cheap for a reason. FlyNDrive #7
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<blockquote data-quote="VikingTrad3r" data-source="post: 331567" data-attributes="member: 2229"><p>Quote:</p><p>Originally Posted by <strong>VikingTrad3r</strong></p><p><em>Thank You guys for both the support and the sanity checks.</em></p><p><em></em></p><p><em>I have recorded <strong>alot</strong> of video today of pulling the driver side head with a full walk through. We are fairly sure we have retraced the steps that a prior owner took on this car.</em></p><p><em></em></p><p><em>As far as we can tell….At some point, there was interference between the piston and valve, on a couple cylinders. One valve broke off. It was caught on the low side of the cylinder, standing on edge. It left an imprint on both the head and the piston top.</em></p><p><em></em></p><p><em>Ok but in addition to this, there are valve kiss marks all the way across the drivers side head.</em></p><p><em></em></p><p><em>Here is the thing. We FOUND a valve under the battery. It had been there a long time. The work on the heads doesnt look to be that old. You can see the blueing that was put there prior to lapping. 3 valves were worked.</em></p><p><em></em></p><p><em>We found all head bolts loose. The head had definitely been pulled as it had the work done to it.</em></p><p><em></em></p><p><em></em></p><p><em>Then, at some point, a decision was made to slap everything back together but not tighten anything. The head bolts were all loose. The lifters were not even in the head. Two valves were missing the springs.</em></p><p><em></em></p><p><em></em></p><p><em>Now truth is, in my opinion, there is actually a world that exists where this thing gets all cleaned up, the missing parts purchased from Chumpvette, the one headgasket reinstalled, and this car could be driven home. With some steel wool i think i could even bring the cams back…..but dont worry Chump wont let me do that. Lets just say his standards for ZR-1 treatment is very high <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /><img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></em></p><p><em></em></p><p><em>Truth is i kinda want to do that. There is a thing in me that wants this to be a fly n drive. Albeit it would take a second trip. And some gaskets.</em></p><p><em></em></p><p><em>…..Meanwhile cyl 5 has a dent on its sleeves top, outboard side. so yeah.</em></p><p><em></em></p><p><em>So, what makes the most sense here is to yank the engine, and send it out for the full enchilada. It will likely save me $2000 to ship to and from here.</em></p><p><em></em></p><p><em>We have been very busy here and i will get a video posted up tonight <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></em></p><p>Any ideas on what may have happened? Some one replaced head gaskets and missed the timing on the timing chain? Timing chain skipped a tooth? Interesting findings.</p><p></p><p>Thanks</p><p></p><p></p><p> </p><p></p><p>ChumpVette , Today 05:52 PM</p><p>Melting Slicks</p><p><img src="https://www.corvetteforum.com/forums/images/ranks/3k-4k.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Quote:</p><p>Originally Posted by <strong>PatrickBowersJr</strong></p><p><em>Any ideas on what may have happened? Some one replaced head gaskets and missed the timing on the timing chain? Timing chain skipped a tooth? Interesting findings.</em></p><p><em></em></p><p><em>Thanks</em></p><p>there is a story and we have been working on figuring it out. It does look like the car dropped a valve and a repair was attempted. It looks like they thought they could time it by throwing the head back on and maybe rotating the camshafts to the proper position. Which was a failure.</p><p></p><p>Quote:</p><p>Originally Posted by <strong>zyal8r</strong></p><p><em><a href="https://www.corvetteforum.com/forums/members/474841-vikingtrad3r.html" target="_blank">@VikingTrad3r</a> This is yet another excellent project post! I can't wait to see how it turns out!</em></p><p><em></em></p><p><em>And oh my... <a href="https://www.corvetteforum.com/forums/members/360180-chumpvette.html" target="_blank">@ChumpVette</a> , is that a yellow '90 ZR-1 in the junkyard??? Sure looks like the 1yr-only '90 body style with the 3rd brake light. Someone needs to rescue that one, too! One of 23 in '90!</em></p><p><em></em></p><p><em>I look forward to your progress! You both are great assets to this forum! I learn a lot reading your threads.</em></p><p><em></em></p><p><em>Mike</em></p><p>It is a narrow body with an aftermarket rear bumper.</p><p></p><p></p><p></p><p>VikingTrad3r , Today 07:02 PM</p><p>Oil Producer</p><p><a href="https://www.corvetteforum.com/forums/members/733-zyal8r.html" target="_blank">@zyal8r</a> Haha. I asked Chump same question about that yellow car. The early cars with those bumpers look soooo good. Hence why i wanted a 90 <img class="smilie smilie--emoji" loading="lazy" alt="😎" title="Smiling face with sunglasses :sunglasses:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f60e.png" data-shortname=":sunglasses:" /></p><p></p><p>My first track car was an 86 with a later bumper like that yellow one and i loved it.</p><p></p><p>This 90 will most definitely rise again <img class="smilie smilie--emoji" loading="lazy" alt="😃" title="Grinning face with big eyes :smiley:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f603.png" data-shortname=":smiley:" />. And it will be a much bigger stronger version of itself <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></p><p></p><p>I took video instead of pictures this trip. It felt like a good idea at the time but stringing these snips of vids together is taking time to learn.</p><p></p><p>Doesnt help that Im overly verbose. <img class="smilie smilie--emoji" loading="lazy" alt="😃" title="Grinning face with big eyes :smiley:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f603.png" data-shortname=":smiley:" /></p><p></p><p></p><p>Chump dropped me off at the Portland International and ive got an hour till boarding. Will try to get some uploaded.</p><p></p><p></p><p>I was attracted to this 90 Z because it was</p><p></p><p>- cheap</p><p>- an enigma</p><p>- a 90, which i wanted</p><p>- i felt bad for the car.</p><p>- chumpvette felt the same.</p><p></p><p>This will end up being a great little thread on reviving an LT5. Its not going to happen overnight <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /></p><p></p><p> </p><p></p><p>Aardwolf , Today 08:10 PM</p><p>Race Director</p><p><img src="https://www.corvetteforum.com/forums/images/ranks/7k-10k.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>There was/is a big thread in the race section on a ZR1 C4 track car. Lots of good info and parts:</p><p></p><p></p><p></p><p></p><p></p><p>ChumpVette , Today 08:14 PM</p><p>Melting Slicks</p><p><img src="https://www.corvetteforum.com/forums/images/ranks/3k-4k.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>Quote:</p><p>Originally Posted by <strong>Aardwolf</strong></p><p><em>There was/is a big thread in the race section on a ZR1 C4 track car. Lots of good info and parts:</em></p><p></p><p></p><p>12 years later and not done. Not the direction this car will be taking.</p><p></p><p> </p><p></p><p>Aardwolf , Today 08:21 PM</p><p>Race Director</p><p><img src="https://www.corvetteforum.com/forums/images/ranks/7k-10k.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p>There was another thread with the same car about brakes if it's helpful at all.</p></blockquote><p></p>
[QUOTE="VikingTrad3r, post: 331567, member: 2229"] Quote: Originally Posted by [B]VikingTrad3r[/B] [I]Thank You guys for both the support and the sanity checks. I have recorded [B]alot[/B] of video today of pulling the driver side head with a full walk through. We are fairly sure we have retraced the steps that a prior owner took on this car. As far as we can tell….At some point, there was interference between the piston and valve, on a couple cylinders. One valve broke off. It was caught on the low side of the cylinder, standing on edge. It left an imprint on both the head and the piston top. Ok but in addition to this, there are valve kiss marks all the way across the drivers side head. Here is the thing. We FOUND a valve under the battery. It had been there a long time. The work on the heads doesnt look to be that old. You can see the blueing that was put there prior to lapping. 3 valves were worked. We found all head bolts loose. The head had definitely been pulled as it had the work done to it. Then, at some point, a decision was made to slap everything back together but not tighten anything. The head bolts were all loose. The lifters were not even in the head. Two valves were missing the springs. Now truth is, in my opinion, there is actually a world that exists where this thing gets all cleaned up, the missing parts purchased from Chumpvette, the one headgasket reinstalled, and this car could be driven home. With some steel wool i think i could even bring the cams back…..but dont worry Chump wont let me do that. Lets just say his standards for ZR-1 treatment is very high 👍👍 Truth is i kinda want to do that. There is a thing in me that wants this to be a fly n drive. Albeit it would take a second trip. And some gaskets. …..Meanwhile cyl 5 has a dent on its sleeves top, outboard side. so yeah. So, what makes the most sense here is to yank the engine, and send it out for the full enchilada. It will likely save me $2000 to ship to and from here. We have been very busy here and i will get a video posted up tonight 👍[/I] Any ideas on what may have happened? Some one replaced head gaskets and missed the timing on the timing chain? Timing chain skipped a tooth? Interesting findings. Thanks ChumpVette , Today 05:52 PM Melting Slicks [IMG]https://www.corvetteforum.com/forums/images/ranks/3k-4k.gif[/IMG] Quote: Originally Posted by [B]PatrickBowersJr[/B] [I]Any ideas on what may have happened? Some one replaced head gaskets and missed the timing on the timing chain? Timing chain skipped a tooth? Interesting findings. Thanks[/I] there is a story and we have been working on figuring it out. It does look like the car dropped a valve and a repair was attempted. It looks like they thought they could time it by throwing the head back on and maybe rotating the camshafts to the proper position. Which was a failure. Quote: Originally Posted by [B]zyal8r[/B] [I][URL='https://www.corvetteforum.com/forums/members/474841-vikingtrad3r.html']@VikingTrad3r[/URL] This is yet another excellent project post! I can't wait to see how it turns out! And oh my... [URL='https://www.corvetteforum.com/forums/members/360180-chumpvette.html']@ChumpVette[/URL] , is that a yellow '90 ZR-1 in the junkyard??? Sure looks like the 1yr-only '90 body style with the 3rd brake light. Someone needs to rescue that one, too! One of 23 in '90! I look forward to your progress! You both are great assets to this forum! I learn a lot reading your threads. Mike[/I] It is a narrow body with an aftermarket rear bumper. VikingTrad3r , Today 07:02 PM Oil Producer [URL='https://www.corvetteforum.com/forums/members/733-zyal8r.html']@zyal8r[/URL] Haha. I asked Chump same question about that yellow car. The early cars with those bumpers look soooo good. Hence why i wanted a 90 😎 My first track car was an 86 with a later bumper like that yellow one and i loved it. This 90 will most definitely rise again 😃. And it will be a much bigger stronger version of itself 👍 I took video instead of pictures this trip. It felt like a good idea at the time but stringing these snips of vids together is taking time to learn. Doesnt help that Im overly verbose. 😃 Chump dropped me off at the Portland International and ive got an hour till boarding. Will try to get some uploaded. I was attracted to this 90 Z because it was - cheap - an enigma - a 90, which i wanted - i felt bad for the car. - chumpvette felt the same. This will end up being a great little thread on reviving an LT5. Its not going to happen overnight 👍 Aardwolf , Today 08:10 PM Race Director [IMG]https://www.corvetteforum.com/forums/images/ranks/7k-10k.gif[/IMG] There was/is a big thread in the race section on a ZR1 C4 track car. Lots of good info and parts: ChumpVette , Today 08:14 PM Melting Slicks [IMG]https://www.corvetteforum.com/forums/images/ranks/3k-4k.gif[/IMG] Quote: Originally Posted by [B]Aardwolf[/B] [I]There was/is a big thread in the race section on a ZR1 C4 track car. Lots of good info and parts:[/I] 12 years later and not done. Not the direction this car will be taking. Aardwolf , Today 08:21 PM Race Director [IMG]https://www.corvetteforum.com/forums/images/ranks/7k-10k.gif[/IMG] There was another thread with the same car about brakes if it's helpful at all. [/QUOTE]
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Saving a 90 ZR-1 in hibernation 20yrs. Cheap for a reason. FlyNDrive #7
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