I just replaced the water pump on my V12, could someone tell me why
there seems to be a very fast pressure biuld up in my cooling
system.I let it run afew minutes and when I try to release the rad
cap, I get alot of pressure on it and it will overflow. What could
be wrong here,thanks–
tippy2
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
If you are sure that your t-stats are installed correctly, that the plumbing
to your expansion tank is clear and that the hose from the expansion tank to
the overflow tank (the one behind the left front wheel well rear baffle) is
not plugged / kinked, it could just be trapped air. The V12 cooling system
is sometimes tough to purge. Set your climate control temp selector to 85
and the fan speed selector to “Defrost” and run the engine for three minutes
or so to ensure the heater matrix and hoses are full. “The Book” recommends
that you carry out the air purging with the front end pointed upward on an
incline or the front end be raised with a floor jack. Raise the front end,
then open the bleeder bolt on the top left side of the radiator and, filling
coolant through the crossover pipe filler - not the expansion tank filler -
fill to within 2 inches of the sealing ring until no air (just coolant) is
coming out at the bleeder. Start it up, run it, shut down and purge again
and repeat until you eventually get no air from the bleeder.
Jim Johnson - NCJOC
'88 XJ-S, V12, Lucas (CEI), TH400 (w/B&M), Dana 2.87
Annapolis, Maryland
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
My engine is in a 1988 xj-s. A hot stream of coolant under pressure
suddenly came out of the engine side of the small overflow tank through
a small hole that seemed to be plugged with a rubber plug before the
leak occurred. Can anyone tell me what this hole is for and how I fix it?
Afton.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Could you be more specific? Where is this small overflow tank?
If it is on the left side (from driver’s perspective) it may me
the coolant remote header tank. If so, the little rubber plug may
in fact be the coolant level sensor, or a plug someone put in
its place.
My engine is in a 1988 xj-s. A hot stream of coolant under pressure
suddenly came out of the engine side of the small overflow tank through
a small hole that seemed to be plugged with a rubber plug before the
leak occurred. Can anyone tell me what this hole is for and how I fix it?
Afton.
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
hi as a few of you no by now im the man with the trike , do I have
to have the big rad that comes with the v12 or can I down size
alittle and run a kenlowe fan on the engine ? also does this engine
need a seperate oilcooler engine / gearbox
cheer v12 triker–
jaguar V12 triker the only way to fly
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Lead sent Sat 14 Apr 2007:
You would have to experiment and see. One of the many cooling
system issues with the cars is that the airflow down stream of the
radiator is restricted by the bulk of the engine within the engine
bay. You won’t have this problem.
All models of the cars ran an engine oil cooler in some form or
other. This wouldn’t do any harm.
Your trans will work at a much lower loading than in the car, but
even so a transmission oil cooler (oil/air) would be so cheap and
easy to fit that you might as well do it.
hi as a few of you no by now im the man with the trike , do I have
to have the big rad that comes with the v12 or can I down size
alittle and run a kenlowe fan on the engine ? also does this engine
need a seperate oilcooler engine / gearbox
You would only need a fan to manage radiator temperature when
stationary. Electric is the obvious choice. I imagine you could
probably get away with a smaller radiator, especially if the engine
is in good condition. If my memory serves me correctly there’s a
formula for calculating the radiator size required. Perhaps another
poster could help here?
Original message:
‘‘hi as a few of you no by now im the man with the trike , do I have
to have the big rad that comes with the v12 or can I down size
alittle and run a kenlowe fan on the engine ? also does this engine
need a seperate oilcooler engine / gearbox’’–
Neville S1 XJ12
Christchurch, New Zealand
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
This is the 3rd time replacing Rod Davis rad. I can’t get
it right. It’s still leaking. I had it checked for
electrolysis and it is ok. But now it seems to be leaking
from the header on the rad. I have only put distilled water
and straight anti freeze in it. What is the answer. Should
I go back to copper rad?–
Robbieredjag
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Robbieredjag sent Thu 21 Oct 2010:
Rob, what time frame are we loking at for the replacements. Are
they fab’d or pressed tanks. I don’t believe going back is the
answer.–
The original message included these comments:
This is the 3rd time replacing Rod Davis rad. I can’t get
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Robbieredjag sent Thu 21 Oct 2010:
I’ve used aluminum radiators for decades without a single problem…
(the one in my ‘‘D’’ type is now 4 decades old)… MY ‘‘E’’ type is 2
decades old.
Look a little deeper… is it possible the radiator is being
twisted somehow? Say an earlier chassis repair that was less than
perfect or some other detail?
Maybe hoses are too long/short and pulling/pushing on it… One
mount hard and the other soft?
Repeated failure of known good products requires a bit of
detective work…–
MGuar
Wayzata Minnesota, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !
In reply to a message from Robbieredjag sent Thu 21 Oct 2010:
repeated failure of known good products requires a bit of detective
work. Perhaps an earlier chassis repair that was done less than
perfect putting a bund or twist on the radiator? too long or short
of a hose putting a strain on the tank? one soft, one hard mount?
This sort of thing will drive people nuts. However I’ve been
using an aluminimum radiator in my ‘‘D’’ type since the 1970’s and
one in my '‘E’'type since the 1980’s
Corvette started using them in the early 60’s and some originals
are still being used.
There is no advantage of using copper radiator over aluminum other
than their ease of repair…–
MGuar
Wayzata Minnesota, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
Visit the Jag Lovers homepage at http://www.jag-lovers.org for exciting services and resources including Photo Albums, Event Diary / Calendar, On Line Books and more !