Fix the front lift system leak problem with this final solution
03-07-2021, 10:37 AM
#261
Regarding the Front Lift, even with the inconvenience it has caused, its benefits waaaaay outweigh the hopefully short lived design defect. Again, unless you are on an extremely sharp hill, lowering below the seam line apx 1/4" (unless the system has already done so for you) removes the problem caused by the defective design and causes NO ill side effects.
for me until the TSB is issued. Now which comes first, the TSB or the Z06? That's the only type of humor that should be used here.
Last edited by C8J; 03-07-2021 at 11:10 AM.
03-07-2021, 11:19 AM
#262
Le Mans Master
The diaphragm might not seal in the area of the groove because it is not being compressed in that location so it may leak.
The diaphragm doesn't appear to have enough volume to compensate for the volume change of the reservoir so it may fatigue over time if it did seal.
It appears that diaphragm is now a glorified gasket.
Edit: Looking more closely at the "diaphragm" pictures, it doesn't appear to be designed to extend and contract.
The diaphragm doesn't appear to have enough volume to compensate for the volume change of the reservoir so it may fatigue over time if it did seal.
It appears that diaphragm is now a glorified gasket.
Edit: Looking more closely at the "diaphragm" pictures, it doesn't appear to be designed to extend and contract.
Man, This new "Blue" cap thing has really caused a stir. Being that I spent a month experimenting with the system and devising the "Gizmo" I have a dog in this hunt. During my experiment phase I never tried a closed system due to concerns of pressure and poppin' the tank. Since this is now on GM I'm down and all in for the final judgement on this new "Blue" cap. I should have mine by the first part of this next week. Once I have it installed on my car I'll be starting the experiment process all over again. The first thing I'm going to due, once the cap is installed, is fill the reservoir to the "MAX" line and then wrap my reservoir in a 6 mil garbage bag. I will then park the car right in the middle of my "very, very inclined driveway and cycle the lift 20 times or more. I'll give it my best to freakin' blow the tank to smithereens. If it happens, I'll get another reservoir tank (Via warranty). My dealer contact is working with me on this one. The replacement tank will simply get the "Gizmo" reinstalled at which point, I'm done, never lookin' back....water under the bridge. I'll update everyone when "She Blows"....or not. We shall see, I ain't scared.....LOL Oh, and this go around, the GoPro will be there along with some bright LED lighting to capture the action!! WoooHooo....
I understand the concern about cyclic fatigue but hopefully GM looked into that and determined it isn't an issue.
Last edited by RKCRLR; 03-07-2021 at 11:26 AM.
03-07-2021, 11:24 AM
#263
In the short time here, I'll take that bet - they probably didn't. Just sayin'.
03-07-2021, 01:33 PM
#264
Racer
Member Since: Sep 2005
Location: Vancouver area, BC, Canada
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Man, This new "Blue" cap thing has really caused a stir. Being that I spent a month experimenting with the system and devising the "Gizmo" I have a dog in this hunt. During my experiment phase I never tried a closed system due to concerns of pressure and poppin' the tank. Since this is now on GM I'm down and all in for the final judgement on this new "Blue" cap. I should have mine by the first part of this next week. Once I have it installed on my car I'll be starting the experiment process all over again. The first thing I'm going to due, once the cap is installed, is fill the reservoir to the "MAX" line and then wrap my reservoir in a 6 mil garbage bag. I will then park the car right in the middle of my "very, very inclined driveway and cycle the lift 20 times or more. I'll give it my best to freakin' blow the tank to smithereens. If it happens, I'll get another reservoir tank (Via warranty). My dealer contact is working with me on this one. The replacement tank will simply get the "Gizmo" reinstalled at which point, I'm done, never lookin' back....water under the bridge. I'll update everyone when "She Blows"....or not. We shall see, I ain't scared.....LOL Oh, and this go around, the GoPro will be there along with some bright LED lighting to capture the action!! WoooHooo....
The issue here is time. How many cycles will it take to crack the plastic tank due to the pressure differential? 20, 200, or 2000?
We do not know. But what we do know if there was a good reason why the system was designed the way it originally was.
And that was to be vented. All of a sudden, it does not need to be vented.
So what changed? Nothing.
What is clear is that GM is gambling the tank/system survives the next 3 years, at which point it becomes the owner's problem, not GM's.
I hope they have tested it with an accelerated aging cycle test.
Another reason as to why extended warranty is prudent if you plan on keeping the car longer than 3 years.
Still not convinced the blue cap will fix the leak, so all of this is still speculation till MAD Matt completes his tests. That will be very helpful to owners with this lift.
Last edited by yelocarbuff; 03-07-2021 at 01:37 PM.
03-07-2021, 01:48 PM
#265
Le Mans Master
Love that plan. Let us know what happens.
The issue here is time. How many cycles will it take to crack the plastic tank due to the pressure differential? 20, 200, or 2000?
We do not know. But what we do know if there was a good reason why the system was designed the way it originally was.
And that was to be vented. All of a sudden, it does not need to be vented.
So what changed? Nothing.
What is clear is that GM is gambling the tank/system survives the next 3 years, at which point it becomes the owner's problem, not GM's.
I hope they have tested it with an accelerated aging cycle test.
Another reason as to why extended warranty is prudent if you plan on keeping the car longer than 3 years.
Still not convinced the blue cap will fix the leak, so all of this is still speculation till MAD Matt completes his tests. That will be very helpful to owners with this lift.
The issue here is time. How many cycles will it take to crack the plastic tank due to the pressure differential? 20, 200, or 2000?
We do not know. But what we do know if there was a good reason why the system was designed the way it originally was.
And that was to be vented. All of a sudden, it does not need to be vented.
So what changed? Nothing.
What is clear is that GM is gambling the tank/system survives the next 3 years, at which point it becomes the owner's problem, not GM's.
I hope they have tested it with an accelerated aging cycle test.
Another reason as to why extended warranty is prudent if you plan on keeping the car longer than 3 years.
Still not convinced the blue cap will fix the leak, so all of this is still speculation till MAD Matt completes his tests. That will be very helpful to owners with this lift.
My plan is to use the blue cap. If the reservoir fails in the future when it is out of warranty I will replace it with a properly designed reservoir/bladder system.
Last edited by RKCRLR; 03-07-2021 at 01:49 PM.
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yelocarbuff (03-07-2021)
03-07-2021, 03:40 PM
#266
Drifting
What changed may be GM recognizing that the previous cap/reservoir design isn't an adequate design for a lift system. My guess is the design was borrowed from an existing brake reservoir design. While a vented design may be required for a brake system it may not be necessary for a lift system. Hopefully there was more scrutiny with the decision to put with a non-vented cap on the existing reservoir and cyclic fatigue was taken into account. I wouldn't be surprised if the TSB includes a lower reservoir fluid level to minimize the pressure differential.
My plan is to use the blue cap. If the reservoir fails in the future when it is out of warranty I will replace it with a properly designed reservoir/bladder system.
My plan is to use the blue cap. If the reservoir fails in the future when it is out of warranty I will replace it with a properly designed reservoir/bladder system.
Last edited by MAD Matt; 03-07-2021 at 04:00 PM.
The following 3 users liked this post by Alohabob:
03-07-2021, 10:36 PM
#268
What changed may be GM recognizing that the previous cap/reservoir design isn't an adequate design for a lift system. My guess is the design was borrowed from an existing brake reservoir design. While a vented design may be required for a brake system it may not be necessary for a lift system. Hopefully there was more scrutiny with the decision to put with a non-vented cap on the existing reservoir and cyclic fatigue was taken into account. I wouldn't be surprised if the TSB includes a lower reservoir fluid level to minimize the pressure differential.
My plan is to use the blue cap. If the reservoir fails in the future when it is out of warranty I will replace it with a properly designed reservoir/bladder system.
My plan is to use the blue cap. If the reservoir fails in the future when it is out of warranty I will replace it with a properly designed reservoir/bladder system.
I checked with my local dealer weeks ago. Th “original” black cap was SPECIFIC to the C8.
03-08-2021, 10:24 AM
#269
Le Mans Master
The cap design is typical of a cap used for a brake fluid reservoir. Although the part number may be specific to the C8 the same design may be used in several other applications. GM many times has different part numbers for parts of the same design.
03-08-2021, 10:48 AM
#270
Drifting
The same cap design has been used throught the GM line up. The M/C cap on my 2018 Silverado is identical to the C8's. Same exact specs, same tabs, same groove...different part number, that's all.
03-08-2021, 11:42 AM
#271
FYI, I just started another thread for my Lift Failure Notification.
https://www.corvetteforum.com/forums...stem-argh.html
https://www.corvetteforum.com/forums...stem-argh.html
03-09-2021, 04:57 PM
#272
Drifting
I have the video footage everyone should and needs to see. It will be posted tomorrow once I get it all edited together. I'm a car guys not a videographer so it's taking a bit more time to make it presentable after downloading it from my GoPro. Stay tuned....
03-09-2021, 06:03 PM
#275
Racer
Thank you for the help!
Bryan
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Tin-can (03-09-2021)
03-09-2021, 07:42 PM
#277
For those not following the other thread, go over there and read what happened to me today when I asked for the new blue cap.
Link to the other lift thread...
Link to the other lift thread...
03-09-2021, 08:08 PM
#278
Pro
Thread Starter
, the blue cap has passed all the stress test with flying colors. Looking forward to your video tomorrow!
03-09-2021, 08:24 PM
#279
Drifting
Last edited by MAD Matt; 03-09-2021 at 08:49 PM.