Eliminating air pump on V12?
#1
Eliminating air pump on V12?
Has anyone ever removed the air pump and the maze of hoses on a V12 HE? I live in a place where any vehicle older than 96 isn't tested for pollution controls and mine is an 83. I'm in the process of pulling the motor and replacing it with an 85 HE and I'd like to simplify and clean up under the hood as much as possible.
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#3
http://www.bernardembden.com/xjs/index.htm
Full details here for this and many other jobs. Thank you Bernie.
Full details here for this and many other jobs. Thank you Bernie.
#4
Awesome! Thanks guys!
I plan on keeping the A/C, but the airpump, rails and various hoses are going bye bye.
This should make working on it somewhat easier, not to mention without the exhaust tubes coming up the back it will be easier to get to the transmission bolts.
Anything else I can eliminate while I've got the engine out? EGR, vac hoses?
Thanks again!
I plan on keeping the A/C, but the airpump, rails and various hoses are going bye bye.
This should make working on it somewhat easier, not to mention without the exhaust tubes coming up the back it will be easier to get to the transmission bolts.
Anything else I can eliminate while I've got the engine out? EGR, vac hoses?
Thanks again!
#5
#6
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You don't have an EGR valve.
A lot of the hoses you see are for the rather bizarre vacuum advance system. I byassed all of them on my V12 and ran the vac advance to a ported vacuum nipple.
Others are for climate control, cannister purge, fuel regulators, fuel temp switch, and cruise control so be careful with your rippin' and tearin' :-)
Cheers
DD
A lot of the hoses you see are for the rather bizarre vacuum advance system. I byassed all of them on my V12 and ran the vac advance to a ported vacuum nipple.
Others are for climate control, cannister purge, fuel regulators, fuel temp switch, and cruise control so be careful with your rippin' and tearin' :-)
Cheers
DD
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#8
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Oh, jeeeezzzz....it was years ago! I think it was a ported source (as opposed to contant vacuum) on the underside of the throttle body.
Or maybe above the thottle body?
Easy enough to check: you want one that doesn't have vacuum at idle but DOES have vacuum just as the throttle is cracked open.
Cheers
DD
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JameyXJ6 (01-06-2011)
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That is True. Reminds me of something a guy said when I showed him the V12 for the first time- "if you poured a glass of water on that, it would take all day for it to finally hit the ground"- alluding to how tightly packed everything is.
#11
Today I think I found what caused the demise of the engine that was in it. One of the smaller coolant hoses had a split in it near the base. I never would have seen it if I hadn't been removing it. It's a shame because it looks like the owner had done routine maintenance regularly.
At least now with all the wiring, hoses and the intakes removed I can see the top of the transmission!
#13
But for the sake of bringing the V12 down to it's simplest form? I can appreciate that. I have an extra v12 that I'd like to rebuild in case mine kicks the bucket and it kind of made me think about rebuilding it as simply as possible and really polish it up.
Wiring and hoses definitely affect all of that a lot. It don't think it will ever look like an old XK engine but there is definitely room for improvement. Good luck mate
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coindigger (10-30-2021)
#16
Hey Bo, sorry that just shows the air rail removal process. someone else showed how to build a jockey pulley (Ed.? help please Doug) to replace the pump, so the belt routing still works.
did the link work ok for you?
#17