XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

Vac questions

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Old 03-17-2018, 08:03 PM
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Default Vac questions

Can someone help me identify what these random Vac lines are? One goes to the distributor but seems to be missing a second half at this cracked orange thing.

And I can't seem to find what this contraption is with a dozen lines going to/from in the space ahead of the driverside tire.






 
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Old 03-17-2018, 08:33 PM
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Distributor vent system


https://www.jaguarclassicparts.com/u...up-to-v-157115

There isn't supposed to be anything on the vacant nipple of the filter


Cheers
DD
 
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Grant Francis (03-18-2018)
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Old 03-17-2018, 08:35 PM
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Carbon canister inside the fender

https://www.jaguarclassicparts.com/u...tre-canada-usa

^^^ this illustration is a bit generic. there were a few variations on the canister plumbing over the years

Cheers
DD
 
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Old 03-18-2018, 05:56 PM
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Originally Posted by Doug
Carbon canister inside the fender

https://www.jaguarclassicparts.com/u...tre-canada-usa

^^^ this illustration is a bit generic. there were a few variations on the canister plumbing over the years

Cheers
DD
Thnx I had forgotten about the site with it's diagrams - has anyone removed this thing on their car? It seems pointless and clogs my engine bay with vac lines...I need that space for my electric AC compressor.
 
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Old 03-18-2018, 06:43 PM
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Long gone on all my V12's.

Tank vented to atmosphere, no issues, or smells.
 
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Greg in France (03-19-2018)
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Old 03-18-2018, 08:14 PM
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Originally Posted by Grant Francis
Long gone on all my V12's.

Tank vented to atmosphere, no issues, or smells.
So from a glance at the engine this entire rats nest of lines and canister is hooked into the crank case vent and crossover pipe T section, your saying that can just be disconnected and the entire mess thrown away? In the diagram it says a line runs back to the fuel tank did you pull that out or is your car different?
 
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Old 03-19-2018, 02:51 AM
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Originally Posted by VancouverXJ6
So from a glance at the engine this entire rats nest of lines and canister is hooked into the crank case vent and crossover pipe T section, your saying that can just be disconnected and the entire mess thrown away?
Yes, that is exactly what Grant means. I have done the same on a Mates's US spec car. Chuck the lot, and the air pump and its horrible pipes in the V if you have them, replacing it with a UK/RoW spec idler pulley


Originally Posted by VancouverXJ6
In the diagram it says a line runs back to the fuel tank did you pull that out or is your car different?
It does. It runs under the car to just in front of the RHS wheel chassis member where it joins a thin metal pipe emerging from the chassis/boot area. Remove the under car pipe and disconnect it here where it joins the thin metal pipe, leaving the metal pipe as is, and you are done. This is how all UK spec cars vent their tank.
 
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Old 03-19-2018, 03:19 AM
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As Greg said, but, I left the pipe under the LH side of the car, and simply put a rubber plug on the exposed end of the open pipe in the LH wheel arch area.

Then, when the tank was out, as you do with these cars, I plugged all the none essential pipes and rubbish in the boot, and still left the under car pipe in situ, getting lazy.
 
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Old 03-20-2018, 12:05 AM
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I like this technique. Rip it all off!

So far in the past week I removed the smog rails - much easier by cutting the little pipes with metal snips no need to remove any hoses or linkage and sealed nicely with grub screws/hi temp gasket, took the 15-minute fuel timer and smashed it in a fit of rage, replaced coolant filter and tagged with coloured tape all the vac lines I can delete with this carbon canister crap. Just waiting for Saturday to finish it.

If anyone is interested the following image is my 3rd coolant filter in roughly 6000km installed after a few proper chemical rad flushes and Shop-Vac assisted flushes. Still pulling sludge out its unbelievable.


 
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Old 03-20-2018, 05:51 AM
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That sludge is in the bloclk.

It is generally the remnants of the head gaskets as it dissolves in teh coolant/water.

NO HARM, it is an open deck engine, so NORMAL procedure.

When you pull the engine down, at about 500K miles, then the block sludge can be scoped out. Mine had nearly 2kg of that crud, and the less weight now means it goes FASTER, whoopee.

As for the emission junk, I simple let it idle, ripped stuff off, CAREFULLY, until it died, then repluged the last thing, restarted it, and moved around some more, man, I had some serious piles of rubbish, and this was all before computers and Forums, so seat of pants stuff, luv it.
 
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