Inside my Gen 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Forced Induction All questions and problems regarding Superchargers, Turbos, NOS, ZEX, intercoolers, water injection, etc.

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Old 12-23-2006, 02:48 AM   #1
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Default Inside my Gen 3

I just had to open it up to inspect the inside and drain out that stinky oil.



It will be my spare now that I will be swapping to the Gen V.


Check out how much coating is gone on one rotor. Each picture is a rotation of each of the three lobes.

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Old 12-23-2006, 02:53 AM   #2
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There wasn't much grease on the bearings. I think the water injection washed a lot of it away.
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Old 12-23-2006, 03:29 AM   #3
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Wow!!! My original GEN III w/ 110k mile wasn't anything like that... but my 53k mile GEN III was about 40% of that....gonna run those rotors until the GEN V...

If you didn't run any cleaner on those rotors, the water injection really did an 'overly' good job of keeping them clean... I must say I've never seen rotors that clean, with or without the coating.
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Old 12-23-2006, 03:44 AM   #4
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The main reason it is so clean is because I don't run with the EGR.

.....and it'* got 30 K mi of very hard driving, that'* probably equal to 120 K mi of candy azz driving.
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Old 12-23-2006, 04:32 AM   #5
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Interesting. I might have to do some fabricating to give it a try.... a small piece of aluminum I have here, some holes drilled, and a pair of egr gaskets.... walla.
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Old 12-23-2006, 10:38 AM   #6
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wow that is alot of coating gone....

good thing your gonna spray post rotot with the Gen V
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Old 12-23-2006, 12:05 PM   #7
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Keep in mind that the EGR keeps combustion temps DOWN and prevent KR in normal applications.

Paul doesn't have that worry because he keeps combustion temps down with injection. I would expect those rotors to be that clean. Even with an EGR, mine were that clean with limited testing of WI. For those that remember how it looked when I swapped to Gen3 before it went on John'* car.

Paul still would have dirty rotors from the PCV and fuel from reversion, but the injection keeps it clean.
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Old 12-23-2006, 01:15 PM   #8
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Yes injecting post rotor will be more effective but I'm still having a hard time with the theory of how the coating disbonds and why only one rotor.

Notice the scuffing on the tips of the worn rotor over a 1 square inch area.
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Old 12-23-2006, 03:54 PM   #9
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Wow...the only way I've ever seen that much coating gone was when I soaked mine in TB cleaner or 45 minutes.

This really shows us that injecting pre rotors with whatever that mix you used....was brutal to the rotors.

Even at 140K miles my rotors had great coating on them and were in great shape. In effect you lowered your boost levels by 1-3lbs at WOT by having coating free rotors.
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Old 12-23-2006, 04:03 PM   #10
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Remember that I've injected pre-rotor too. Not to the extent or the amounts that Paul has, but it'll be interesting to see what that SC looks like when it comes off the car.
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