XJ40 ( XJ81 ) 1986 - 1994

PCV valve for xj40 sovereign 1990

 
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Old 06-14-2017, 02:45 AM
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Default PCV valve for xj40 sovereign 1990

Hi everyone, quick question from a noob. Where do I get a new PCV valve for this girl from? is it a standard size? PCV is one thing I have admittedly never even looked at in my life with any car, so I'm not sure how to source one. any relevant specs would be great. xx
 
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Old 06-14-2017, 05:47 AM
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Alrighty so the weather has been awful and I haven't had a chance to get into any of this. I do however keep seeing my symptoms come up when pcv valve malfunction or hose leak is mentioned. I'm interested in adding that to my to-check list, but I'm not sure what kind of PCV valve we have in a 4.0L xj40 sov. Anyone got a pic and explanation for me? Tomorrow if the storm dies down a little I'll be getting into the throttle body and ICV after work.
 
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Old 06-14-2017, 05:56 AM
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A quick call to Jagdaim would be my first stop. Doug Findlay knows his stuff, if they don't have one he will know where to point you.
He will also know if there a generic one you can get.

Jaguar Spare Parts Supplier - Jagdaim - Australia's Largest Independant

http://www.jagbits.com/jaguarpcvvalve.php
 

Last edited by o1xjr; 06-14-2017 at 05:59 AM.
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Old 06-14-2017, 06:07 AM
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Originally Posted by o1xjr View Post
A quick call to Jagdaim would be my first stop. Doug Findlay knows his stuff, if they don't have one he will know where to point you.
He will also know if there a generic one you can get.

Jaguar Spare Parts Supplier - Jagdaim - Australia's Largest Independant

Jaguar PCV Valve New and Used OEM and Aftermarket Jaguar Parts Online Catalog
Thanks love, will do! Though I'm reading now that it doesn't even have a conventional pcv valve as such, and it instead uses a full load and part load breather hose system.. i think I should go ahead and do a mechanics apprenticeship to make owning this xj easier ;D
 
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Old 06-14-2017, 09:23 AM
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Originally Posted by BeckBeck View Post
I'm not sure what kind of PCV valve we have in a 4.0L xj40 sov. Anyone got a pic and explanation for me?
Hi BeckBeck,

There is no PCV valve on an XJ40. Crankcase breathing is managed by a series of pipes, hoses and restrictors which are designed to maintain a slightly negative air pressure in the crankcase under varying running conditions. I believe the info is in the Engine Management System manual:

AJ6 4.0L Engine Management System/OBDI Diagnostic Guide

Cheers,

Don
 

Last edited by Don B; 06-14-2017 at 01:30 PM.
The following 5 users liked this post by Don B:
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Old 06-14-2017, 10:58 PM
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Originally Posted by Don B View Post
Hi BeckBeck,

There is no PCV valve on an XJ40. Crankcase breathing is managed by a series of pipes, hoses and restrictors which are designed to maintain a slightly negative air pressure in the crankcase under varying running conditions. I believe the info is in the Engine Management System manual:

AJ6 4.0L Engine Management System/OBDI Diagnostic Guide

Cheers,

Don
THANK YOU! This is such a helpful document!
 
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Old 06-16-2017, 02:15 PM
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Hi BeckBeck,

I moved the relevant posts from the Stalling thread to this thread so all the info regarding the mythical XJ40 PCV valve is in the same thread.

Cheers,

Don
 
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