88 HE Hose Location
#1
88 HE Hose Location
Continuing diagnosis of white smoke from one side of exhaust.
Always starting the elementary stuff first, cap, rotor, plugs and wires. I can see that the B bank surely isn't burning as well as A.
The Vacuum hose that comes from the cap goes where? I can't see where it attaches, somewhere along the firewall? The hose is straight, but it's baffling me, advice and/or a pic would be well helpful. Thank you
Always starting the elementary stuff first, cap, rotor, plugs and wires. I can see that the B bank surely isn't burning as well as A.
The Vacuum hose that comes from the cap goes where? I can't see where it attaches, somewhere along the firewall? The hose is straight, but it's baffling me, advice and/or a pic would be well helpful. Thank you
#2
Join Date: Mar 2008
Location: Pacific Northwest USA
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The hose to the AAV has a hose nipple molded into it. One hose from the distributor cap goes there. This provides a small vacuum to pull air thru the distributor
The other hose from the distributor cap goes along the diagonal fender brace and terminates with a small open-end filter. This is the fresh air intake to the distributor.
Problem is, I'm having a brain fade as to which hose goes where on the cap itself. Others will chime in
Cheers
DD
The other hose from the distributor cap goes along the diagonal fender brace and terminates with a small open-end filter. This is the fresh air intake to the distributor.
Problem is, I'm having a brain fade as to which hose goes where on the cap itself. Others will chime in
Cheers
DD
#4
Join Date: Mar 2008
Location: Pacific Northwest USA
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The hose in your picture doesn't look long enough to reach either destination IMHO
http://www.jaguarclassicparts.com/uk...alve-5-3-litre
http://www.jaguarclassicparts.com/uk...utor-5-3-litre
Cheers
DD
http://www.jaguarclassicparts.com/uk...alve-5-3-litre
http://www.jaguarclassicparts.com/uk...utor-5-3-litre
Cheers
DD
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mrtalkradio (10-04-2015)
#5
The hose that goes into the bottom of the dizzy comes from the inlet, the hose that exits the dizzy cap higher up goes to the AAV hose nipple pipe. The idea is to ensure no explosive fumes build up inside the dizzy, by a small but constant "suck" though it into the inlet manifold when the car is running.
Greg
Greg
Last edited by Greg in France; 10-04-2015 at 04:53 AM.
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mrtalkradio (10-04-2015)
#6
#7
don't forget that white smoke can be generated by trans fluid entering the engine
this can be sucked up the trans vac line into one bank of the engine ( right bank ) , the vac valve on the trans can leak and provide the fluid that ends up in the engine
just another one to tick off the list
BB
this can be sucked up the trans vac line into one bank of the engine ( right bank ) , the vac valve on the trans can leak and provide the fluid that ends up in the engine
just another one to tick off the list
BB
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#8
how would ' explosive fumes ' get in the cap , as the engine is a sealed system not exposing anything that would combust
BB
#9
#10
is it for explosive fumes ? or is it to disperse the ozone gas generated by the HT sparking in the cap , ozone will corrode the contacts if not removed causing high resistance and poor running,
how would ' explosive fumes ' get in the cap , as the engine is a sealed system not exposing anything that would combust
BB
how would ' explosive fumes ' get in the cap , as the engine is a sealed system not exposing anything that would combust
BB
I may be mistaken, but I seem to remember reading somewhere that early XJSs did not have the venting system and that occasionally the dizzies blew to bits. The fumes come from engine oil via the shaft seal to the jackshaft, or even dizzy lube evaporating under the heat conditions, I always supposed. Also, ozone is an explosive gas, just like oxygen, so this might have been the source.
Greg
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Philurusso
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