1997 Tensioner Pulley
#1
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Does anyone have an XK8 with a NCA7739AC tensioner and are willing to measure the pulley? My pulley broke and I bought a new replacement (P/N ALT04144) which has a 3.0" (76mm) diameter, when I put it on the belt felt really tight. I'm wondering what was the original diameter. BTW the bearing in this pulley is P/N 6203RS. Thanks.
#2
#3
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Does anyone have an XK8 with a NCA7739AC tensioner and are willing to measure the pulley? My pulley broke and I bought a new replacement (P/N ALT04144) which has a 3.0" (76mm) diameter, when I put it on the belt felt really tight. I'm wondering what was the original diameter. BTW the bearing in this pulley is P/N 6203RS. Thanks.
Richard
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cjd777 (12-21-2023)
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I used the same Dayco 89016 pulley for both the idler and the tensioner some time back with no issues. It is 76mm diameter metal with no flanges.
Has the serpentine belt been replaced with, possibly, a slightly shorter one? As Richard says, there's some latitude in belt length that can be accommodated by the tensioner.
See the pics in this post from DaveInVA for the belt stretch markings on the tensioner body:
https://www.jaguarforums.com/forum/x...2/#post1196718
There's a post somewhere here that explains the marks, but they're basically new-ok-replace
Has the serpentine belt been replaced with, possibly, a slightly shorter one? As Richard says, there's some latitude in belt length that can be accommodated by the tensioner.
See the pics in this post from DaveInVA for the belt stretch markings on the tensioner body:
https://www.jaguarforums.com/forum/x...2/#post1196718
There's a post somewhere here that explains the marks, but they're basically new-ok-replace
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