Thread: Valve tip wear pattern-way off
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12-30-2011 08:25 PM #1
Valve tip wear pattern-way off
Good day!
I just pulled the valve covers off my 427 motor, which only has 100 miles on it since rebuild, and the valve tips have an odd wear pattern from the rockers.
-Every valve tip on the passenger side of the engine is worn towards the front outer side of the valve, if facing from the passenger fender. All have a double hump pattern.
-The valve tips on the driver's side are worn in a much different way.
When facing from the driver's side fender:
-Intake valves #1 and #3 are worn on the right side. #5 is worn on the right side as well, but diagonally. Imagine drawing a line from the lower left corner of the valve to the upper right corner and that is where the valve tip is worn.
-Exhaust valves #1 and #3 are worn on the right side.
-Exhaust valve #5 is worn on the upper right half
-Exhaust valve #7 is worn on the bottom left half.
Can anybody help me with this issue???
Notes:
-The heads have had a valve job, which included new stainless steel valves and new
guides.
-The rockers are the stock stamped steel 1.7 rockers.
-The pushrods are the stock length and as far as i can tell, when i turn the engine over slowly by hand,the geometry looks correct. however, I am only observing this on one set of rockers, not all because it is impossible to see them without removing all of the studs.
-The previous owner did replace the stock pushrod guides with comp cams guides and ARP studs. However, he never fired the engine and my shop actually had to go back through the heads for several reasons.
Anyway, I am at a bit of a loss on this one. Could it be the guide plates or is more likely the valve guides?? Other?
I have contacted my engine shop, but they will most likely be closed till Tuesday.
Thanks for the help in advance!!!Last edited by RestoCreations; 12-30-2011 at 08:28 PM.
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12-30-2011 08:35 PM #2
It would help not only to know what kind of engine, heads, etc but a pic or two would be worth a thousand words
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