Re: 90 ZR-1 #2273 - To be rescued
nice story, good work!
tell me pls clipers are from porsche 911? |
Re: 90 ZR-1 #2273 - To be rescued
Thanks!
They are indeed the "big red" from the 911 (993). The kit is made by Movit in Germany. |
Re: 90 ZR-1 #2273 - To be rescued
ok, thanks.
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Re: 90 ZR-1 #2273 - To be rescued
As mentioned before, I've had some idle issues. A couple days ago I picked up the investigation with the following results. The car idles steady at approx. 750 RPM when the fans are running. If I plug the bore to the primary blade, the idle reduces to 700. IAC count obviously at zero.
I removed the TB for another inspection, and it's obvious that there is quite a bit of wear on all the plates. The secondary blades show a lot of light around the shafts, and the primary lights up everywhere. Instead of going through with the whole DAG-procedure, I've now packed up the TB and sent it of to the US for Marc to work his magic. Must say I'm curious if he'll be able to mend it. I've also removed the exhaust, as the pilot bearing is next on the list of jobs. The daily effort is rather limited due to the 5°F in my garage. |
Re: 90 ZR-1 #2273 - To be rescued
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Re: 90 ZR-1 #2273 - To be rescued
Cool story man. I love reading stuff like that. Looks to me like it's in good hands this time.
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Re: 90 ZR-1 #2273 - To be rescued
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H :cheers: |
Re: 90 ZR-1 #2273 - To be rescued
This stuff works like DAG...I believe its the same material essentially
https://www.grainger.com/product/41P...180222234249:s |
Re: 90 ZR-1 #2273 - To be rescued
Might be just the DAG on the secondary blades, but as the photo shows indirect light, the gap/axial clearance is rather large.
The primary is however clearly worn, though the light makes it impossible to see on that pic. It's got the same wear as Phil (Jagdpanzer) had, just not quite as bad. Throttle Body Primary Blade wear issue http://i540.photobucket.com/albums/g...ps6zjhkzli.jpg I've got a bottle of Molycote D321r laying around (DAG), but I'll leave it on the counter until I've seen what Marc can do with it. |
Re: 90 ZR-1 #2273 - To be rescued
Slightly warmer today, allowing some minor progress. Need expert opinions on the condition of the clutch/PP/Flywheel condition. Thoughts?
The clutch plate measures approx. 6.5mm thickness. Whats the thickness of a new plate? Couldn't really see too many signs of the pilot bearing rotating inside the crank, and throwout bearing feels surprisingly good. Nice and tight. There is no play between the masses of the flywheel, but it does allow about 1/2" movement between them, some force required. https://imagizer.imageshack.com/v2/8...923/TEMSRN.jpg https://imagizer.imageshack.com/v2/8...923/GKQvd7.jpg https://imagizer.imageshack.com/v2/8...922/tJYN8i.jpg https://imagizer.imageshack.com/v2/8...924/i0VEW1.jpg https://imagizer.imageshack.com/v2/8...922/ab3e8a.jpg https://imagizer.imageshack.com/v2/8...924/CC022y.jpg https://imagizer.imageshack.com/v2/8...924/PzDQsH.jpg https://imagizer.imageshack.com/v2/8...924/aYy0bi.jpg |
Re: 90 ZR-1 #2273 - To be rescued
Expert opinion received from Bill Boudreau,
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Re: 90 ZR-1 #2273 - To be rescued
Your 6.5mm disc thickness translates to .255 inches. As Bill notes .320 is the standard for a new disc. As I understand it minimum thickness is .230. So your disc is about done.
Will you simply replace the disc or will you take the opportunity to install a light weight flywheel and sprung hub disc? H :cheers: |
Re: 90 ZR-1 #2273 - To be rescued
The disc seems to be due for replacement, yes. It seems Bill has faith in the pressure plate and TO bearing, but he dares not give an estimate on the remaining life span of the DM flywheel.
Light flywheel is not an option for me. I've gone that way before on another project, and I regretted it ever since. The rattle and loss of driveability is just not worth it. I see Jerry's has a couple DM flywheels left, and I must say it's tempting, but it's not a cheap option. Right now I'm just looking to see if I can find all the right parts and their price, to estimate a total cost. The OEM clutch disc also seems hard to find. |
Re: 90 ZR-1 #2273 - To be rescued
Got the TB back from Haibeck this week, and it's obvious that there is just so much one can do when the blades are getting worn. You can still see right past the blades close to the shafts. Maybe I'll have to attack it with the Molycote D321-R as well, to Band-Aid the lost DAG. TPS had also gotten damaged during shipping back to me, so I'll need to replace and calibrate that one as well.
Too bad, really, as I was hoping for some kind of magical repair resulting in a perfect seal. Maybe one has to go for the 63mm blades? |
Re: 90 ZR-1 #2273 - To be rescued
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Re: 90 ZR-1 #2273 - To be rescued
I am rather upset with myself for not knowing of this gentlemen you mention, before I spent over $600 (incl. $150 in shipping) to repair the TB. What a waste..
How can I get in touch with Mr. VanDeventer? |
Re: 90 ZR-1 #2273 - To be rescued
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Re: 90 ZR-1 #2273 - To be rescued
There is absolutely nothing wrong with the work Marc did on the TB, and it may very well be that the blades seal enough for the IAC to control the idle, if no other leaks are present. I'm sure he would've told me if he actually thought further work was necessary.
I probably failed to inform him of the extent of repair I was looking for. He has been vastly helpful throughout my restoration project, and I don't really wish to bother him any more with it. |
Re: 90 ZR-1 #2273 - To be rescued
I doubt Marc considers it a bother.
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Re: 90 ZR-1 #2273 - To be rescued
I have some original throttle plates
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Re: 90 ZR-1 #2273 - To be rescued
Now that I have my ZF laying on the workbench, is there anything else I should look at while "in there"? I've already checked the back-up light switch for proper movement, and plan to freshen up the ground points where the wires collect on the back of the engine. The transmission will be installed with fresh oil and new drain/fill plugs (vw brand). Drive shaft is getting new joints.
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Re: 90 ZR-1 #2273 - To be rescued
Think about replacing the tail shaft seal and check the yolk to the driveshaft for play on the output shaft splines. ZF Doc has the specs for yolk play on his site. That said, unless it’s very high mile car, has been abused or both it’s unlikely the yolk will be an issue.
H :cheers: |
Re: 90 ZR-1 #2273 - To be rescued
Thanks Hans, I'll check the specs.
Car's got 70k miles. |
Re: 90 ZR-1 #2273 - To be rescued
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Re: 90 ZR-1 #2273 - To be rescued
Is this the one?
https://www.corvetteforum.com/forums...1-update-1.jpg https://www.corvetteforum.com/forums...1-update-2.jpg If so, the car looks great. Love the color. I really would've loved to have the top end re-painted as well, but not sure who I would trust with such a task on this side of the Atlantic. |
Re: 90 ZR-1 #2273 - To be rescued
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Re: 90 ZR-1 #2273 - To be rescued
Joe,
Good to see u back in a ZR. U should come to Haibeck’s this Sunday. |
Re: 90 ZR-1 #2273 - To be rescued
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I have it on my calendar, but if I come over I will either drive the ‘12 or my daily driver. Got the seats back out of the ZR-1 in preparation of a modification. |
Re: 90 ZR-1 #2273 - To be rescued
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I'll finally be able to make som progress myself, as I've just received some parts from Jerry and Kurt White. Complete NOS clutch kit. DM Flywheel from Jerrys. Throw out bearing, pressure plate (deep dish) and clutch disc from Kurt. https://imagizer.imageshack.com/v2/8...924/Mie98H.jpg Can't wait for work to commence on my new garage. The old one is getting rather cramped. https://imagizer.imageshack.com/v2/8...923/YaOPKd.jpg |
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Re: 90 ZR-1 #2273 - To be rescued
Are you replacing the foam/leather on the seats yourself?
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Re: 90 ZR-1 #2273 - To be rescued
Yes, I purchased the seat covers through Corvette America and ordered their foam kit also. The foam and covers were installed by a shop recommended by my painter. The seats turned out great. The foam is more dense than the factory foam, especially after 27 years, but they are comfortable and look fantastic.
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Re: 90 ZR-1 #2273 - To be rescued
Do you have any pics of the seats as they are now? I bought my stuff from Corvette Central and wasn't really satisfied with either the foam or the leather. I think I posted som pics of them somewhere in this thread.
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Re: 90 ZR-1 #2273 - To be rescued
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H :cheers: |
Re: 90 ZR-1 #2273 - To be rescued
Pricey indeed. The man has a few to many balls in the air at once, so persistence is necessary to acquire parts from him. He is however still in business, and has quite a lot of unique parts in store.
Must say I was quite relieved to open the parcel and find exactly what I had ordered. He gets alot of poor feedback, but (knock on wood) I've yet to have a bad experience purchasing from him. |
Re: 90 ZR-1 #2273 - To be rescued
Do you install the rubber boot on the transmission tunnel first, and then bolt it on to the transmission once it's installed?
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Re: 90 ZR-1 #2273 - To be rescued
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H :cheers: |
Re: 90 ZR-1 #2273 - To be rescued
The only issue I can imagine, would be wrapping the boot over it's locator frame on the driver's side. Seem to remember it was a rather tight fit? But if you say it's possible I'll just leave the boot on the tranny.
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Re: 90 ZR-1 #2273 - To be rescued
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