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XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

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Old 05-26-2017, 02:31 PM
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anyone found any deceleration valve's. as I am sure I have got them on my car
 
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Old 05-27-2017, 09:02 AM
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Originally Posted by rgp
anyone found any deceleration valve's. as I am sure I have got them on my car
What's the question, Rex? They are on the front end of the manifolds.
 
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Old 05-28-2017, 03:49 AM
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misspelled that. I don't ever remember seeing them when I have had it stripped, are the something you would particularly notice?
 
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Old 05-28-2017, 06:48 AM
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On the forward end of each manifold you either have the overrun valve, an aluminum cap with a cylindrical protrusion, or a roughly triangular block-off plate.

 
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Old 05-28-2017, 09:15 AM
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Originally Posted by rgp
misspelled that. I don't ever remember seeing them when I have had it stripped, are the something you would particularly notice?
As in the photo from JJ, no. 11:

if there is too high a vac on deceleration, the spring 9which is very strong) gives and so opens the valve to admit air from the airbox (tube22). Jaguar deleted them on later v12s
 
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