[Z06] Exhaust Valves 1 & 7 the ones to wiggle test?
#1
Burning Brakes
Thread Starter
Exhaust Valves 1 & 7 the ones to wiggle test?
It seems many people will only have two valves checked for a wiggle test. I reviewed the Master Guide Clearance Thread (http://forums.corvetteforum.com/c6-z...ster-list.html)
and it looks like (with exception, of course) that the bottom measurements of the #1 and #7 exhaust valves tend to be the worse off. If I do the test, these will be the ones I check first.
Did anyone see anything strongly different?
and it looks like (with exception, of course) that the bottom measurements of the #1 and #7 exhaust valves tend to be the worse off. If I do the test, these will be the ones I check first.
Did anyone see anything strongly different?
#4
Burning Brakes
Thread Starter
Like I said, anything can vary but just looking at the lists seemed like these two generally gave a better look than most. Checking all is best, but if someone (a dealer, wiggle test vendor, you, etc.) will only check two, then maybe these would be best.
How was your #1 compared to others?
How was your #1 compared to others?
#5
These measurements were done with the heads off the car using a dial indicator gauge at 3/4-1" above the guide with the valve just off its seat.
Cylinder - Intake - Exhaust
1- .010 - .009
2- .010 - .010
3- .010 - .009
4- .009 - .008
5- .010 - .011
6- .008 - .008
7- .007 - .006
8- .010 - .008
Based on the calculation from wiggle test measurements to actual clearances (/2):
1- .0050 - .0045
2- .0050 - .0050
3- .0050 - .0045
4- .0045 - .0040
5- .0050 - .0055
6- .0040 - .0040
7- .0035 - .0030
8- .0050 - .0040
Cylinder - Intake - Exhaust
1- .010 - .009
2- .010 - .010
3- .010 - .009
4- .009 - .008
5- .010 - .011
6- .008 - .008
7- .007 - .006
8- .010 - .008
Based on the calculation from wiggle test measurements to actual clearances (/2):
1- .0050 - .0045
2- .0050 - .0050
3- .0050 - .0045
4- .0045 - .0040
5- .0050 - .0055
6- .0040 - .0040
7- .0035 - .0030
8- .0050 - .0040
#8
Burning Brakes
Thread Starter
My effort on this thread is to find the most commonly (on average) worst off valves so as to help others quickly check. I'm inviting anyone to point out patterns they see amongst the data on this forum, not for anecdotal "well my personal motor was different so there isn't a pattern." Some cylinders get hotter than others, so maybe they would be the better ones to check first.
#9
#10
Team Owner
I'm sure he is going to give you your actual measurements. Looking forward to your results
DH