White Exhaust Valve Stems at Francisco Columbus blog

White Exhaust Valve Stems. When i removed the head, all four exhaust valves were coated with a white crusty substance. When i analyzed it, it was basically a lead compound. From a google search on white exhaust valve stems: I had white deposits on the exhaust valves of my 1971 oldsmobile. The two exhaust valve shafts were white in color, and looked to have a good.25 or.5 mm of lumpy white coating on them. Though severe stem wear and galling is usually obvious to the naked eye, you usually can’t see concentricity problems. As you can see all the exhaust valves stems have a very light white coating. The area that is white receives the most heat from the exhaust, if you look downstream behind the valve guide and guide boss you will see a nice black color. Over time, the constant flexing can lead to metal fatigue, cracking and valve failure. A few clues to help you on your way.

White 987.1 CS exhaust valves...normal? r/Porsche
from www.reddit.com

The two exhaust valve shafts were white in color, and looked to have a good.25 or.5 mm of lumpy white coating on them. A few clues to help you on your way. I had white deposits on the exhaust valves of my 1971 oldsmobile. From a google search on white exhaust valve stems: The area that is white receives the most heat from the exhaust, if you look downstream behind the valve guide and guide boss you will see a nice black color. When i analyzed it, it was basically a lead compound. When i removed the head, all four exhaust valves were coated with a white crusty substance. Over time, the constant flexing can lead to metal fatigue, cracking and valve failure. Though severe stem wear and galling is usually obvious to the naked eye, you usually can’t see concentricity problems. As you can see all the exhaust valves stems have a very light white coating.

White 987.1 CS exhaust valves...normal? r/Porsche

White Exhaust Valve Stems I had white deposits on the exhaust valves of my 1971 oldsmobile. I had white deposits on the exhaust valves of my 1971 oldsmobile. Over time, the constant flexing can lead to metal fatigue, cracking and valve failure. Though severe stem wear and galling is usually obvious to the naked eye, you usually can’t see concentricity problems. As you can see all the exhaust valves stems have a very light white coating. When i analyzed it, it was basically a lead compound. The area that is white receives the most heat from the exhaust, if you look downstream behind the valve guide and guide boss you will see a nice black color. A few clues to help you on your way. The two exhaust valve shafts were white in color, and looked to have a good.25 or.5 mm of lumpy white coating on them. When i removed the head, all four exhaust valves were coated with a white crusty substance. From a google search on white exhaust valve stems:

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