XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Help - brake booster valve?

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Old 11-21-2021, 10:53 AM
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Default Help - brake booster valve?

1983 XJS. Sorry if my terminology is poor, but last night I was trying to remove the vacuum line that runs to the top of the brake booster (aka servo) when the plastic adapter/plug/valve thing broke:




Is this something I can replace on its own or will I need to purchase a new servo?

I found this, wondering if it would work: Brake check valve

Thanks
 
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Old 11-21-2021, 03:36 PM
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[QUOTE=MrAndersonGCC;2467457]1983 XJS. Sorry if my terminology is poor, but last night I was trying to remove the vacuum line that runs to the top of the brake booster (aka servo) when the plastic adapter/plug/valve thing broke:



At the price it's worth a punt, probably a grommet might go down well



 
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Old 11-21-2021, 04:19 PM
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Originally Posted by rgp
At the price it's worth a punt, probably a grommet might go down well
Here’s where I’m at. Either super glue the old plastic piece back together or attempt to use the Dorman one I picked up today. Will probably just order another jag one but in the meantime need to have something to move the car short distances. Video below.

 
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Old 11-22-2021, 08:55 PM
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I'm pretty sure you'll find that the plastic elbow (RTC1128) is nothing more than a....plastic elbow. And not a check valve.

The check valve (CAC4188) is in the plumbing of the vacuum pipes and hoses.





Cheers
DD
 
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Old 11-22-2021, 08:58 PM
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Originally Posted by Doug
I'm pretty sure you'll find that the plastic elbow (RTC1128) is nothing more than a....plastic elbow. And not a check valve.

The check valve (CAC4188) is in the plumbing of the vacuum pipes and hoses.





Cheers
DD
Yes, thanks for clearing that up Doug. I'll be making a trip to the auto parts store tomorrow to find something that will fit.
 
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Old 11-22-2021, 08:59 PM
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By the way, all the Jaguar versions I've seen were red and had a single nipple. I think the one you have is a replacement intended for some other application or perhaps a "universal" replacement



Cheers
DD
 
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Old 11-22-2021, 09:12 PM
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Originally Posted by Doug
By the way, all the Jaguar versions I've seen were red and had a single nipple. I think the one you have is a replacement intended for some other application or perhaps a "universal" replacement



Cheers
DD
Yeah I suspected as much. I noticed in your picture what looks like a bag of grease; is greasing the plastic elbow recommended? (Talking about the side that goes into the servo, not the vacuum line side).
 
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Old 11-23-2021, 12:01 AM
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Silicone grease, I suspect.

The original elbows, in my experience, are a very tight fit. The grease helps things along a bit

Cheers
DD
 
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