[Z06] New (Bad) Engine Noise!
06-14-2011, 05:34 PM
#41
Drifting
Thread Starter
That looks like a lubrication issue, providing the rollers aren't from China.
Those rollers should be hardened. The cam looks like it took the abuse from the roller. For how long it anyone's guess.
Looking @ your bearing surfaces on the cam, I'd say the oil isn't holding up. What kind of oil temps are/were you seeing? Mobil 1 falls off quickly if the temp. soars. (300+)
Also, did you load the engine @ cold startup numerous times? You know, start it and rev it just to show your friends how good the pipes sound? (I've seen it done on bikes, that's why I ask...)
Those rollers should be hardened. The cam looks like it took the abuse from the roller. For how long it anyone's guess.
Looking @ your bearing surfaces on the cam, I'd say the oil isn't holding up. What kind of oil temps are/were you seeing? Mobil 1 falls off quickly if the temp. soars. (300+)
Also, did you load the engine @ cold startup numerous times? You know, start it and rev it just to show your friends how good the pipes sound? (I've seen it done on bikes, that's why I ask...)
I have never loaded the engine cold big no no
in the both aviation and the automotive world. ( I am an A&P, Airframe and Powerplant Mechanic with an IA, Inspection Authorization.)The Chevy Mechanic at the dealer told me that he has seen this before but in LS truck motors. This was the first that he had seen in a Vette motor.
Mark
06-14-2011, 09:16 PM
#45
Burning Brakes
Dang, I have the same build date: Dec, 2007 as you. How many miles on your Z when you first started noticing the noise? I'm at 8200 miles...
06-14-2011, 09:36 PM
#46
The Consigliere
Member Since: May 2006
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Glad to hear you found the culprit. That's one nasty looking lifter.
Hope you're back on the road soon.
Hope you're back on the road soon.
06-15-2011, 09:08 AM
#47
Drifting
Thread Starter
09-22-2011, 05:16 PM
#48
Drifting
Thread Starter
Just thought I would give you all an update.... I now have 28,000 mile on the Z06 and everything seems to be working fine at this time. I have heard that GM Engineers got the parts that came out of my car and I was told that the camshaft did not have the proper hardness and that is what damaged the lifters.
Mark
Mark
09-22-2011, 05:26 PM
#49
Burning Brakes
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Glad to see they found the issue! Even more I'm glad you caught it before anything went seriously wrong requiring a new motor. That tells us all to be very vigilant on ALL of our cars when driving!
09-22-2011, 06:38 PM
#50
Maybe there is an issue here?... Everytime I change my oil, and I change it frequently, there's that metal fuzz on both magnetic drain plugs. SHOULDN'T have metal on the drain plugs. But, seems like it's happening to everyone who owns a Z? 
09-23-2011, 02:15 PM
#52
Drifting
Thread Starter
09-23-2011, 03:13 PM
#53
Burning Brakes
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I have never had any. I've owned the car 15 months and have done probably 4 oil changes.
09-23-2011, 04:29 PM
#54
10-06-2011, 03:00 PM
#55
Drifting
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Same problem
Same song, second verse. It was SERIOUSLY loud too... if you encounter this problem you will not have to wonder about it - it'll make you stop the car and not drive it on sound alone even though it'll run (a little rough) close to normal. My '07 has a 10-2006 manufacture date. It's at Jim Ellis Chevrolet having the cam, lifters, etc., replaced under warranty. God bless the bullet-proof 427 and a 100k powertrain warranty!
For the record - 95K miles.
For the record - 95K miles.
10-22-2011, 02:04 AM
#60
Race Director
