Erratic Vaccuum readings
#42
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#44
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#46
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I was able to find the manuf. marking on the top by the keeper with a magnifying glass and it's a REV CL-1717 inconel. Seems to check out as the same type of valves and not cheap. Why would the valve that's bad with the pitting be magnetic on the stem and the valve that's good be magnetic only at the top by the keeper? Does anyone know?
#47
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Join Date: Jul 2009
Location: west of chitown, il
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Personally, you have enough evidence there to assume you will have issues with any other valves your mechanic replaced. I would at this point do some cheap insurance and replace all the valves with Manley or Ferrera or other good valve. You have the motor apart and the extra $500 at this point will save you headache. Last thing is you need is a valve hanging up and breaking a tip on you. Just my .02
#48
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I was able to find the manuf. marking on the top by the keeper with a magnifying glass and it's a REV CL-1717 inconel. Seems to check out as the same type of valves and not cheap. Why would the valve that's bad with the pitting be magnetic on the stem and the valve that's good be magnetic only at the top by the keeper? Does anyone know?
Eddie
#49
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If the stem is magnetic and the head is not, it's a 2 piece valve. The head is Inconel and the stem is SS. The stock valves in a 454/502 Mag, for example, are the same way. Better quality valves are solid Inconel, like Manley's. If you have one that is only magnetic on top of the stem, then it is all Inconel. That is a quality valve. I would change them.
Eddie
Eddie
Last edited by Seahawk 2000; 05-23-2013 at 03:26 PM.
#50
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I would say that it became pitted because it is only SS, not Inconel. If it's magnetic, it's not solid Inconel. I would guess that it must have gotten water on it at some point to cause the pitting. It was probably from reversion when the valve was hanging up in the guide. Personally, I wouldn't chance it and would replace all of the exhaust valves. I'm not familiar with Rev's valves. I've never used them. A set of Manley's will only run you about $425 or so. That's cheap insurance to know that they are good.
Eddie
Eddie