Last modified 2005 APR 07 04:40:13 GMT |
As anyone who has dealt with the V-12 coolant crossover pipe can tell you, it is a bear to install. With this in mind, I elected to make an easy modification to mine which greatly simplifies the reinstallation.
No mention of this would be complete without also noting that if you need a replacement (because yours is corroded beyond reconditioning perhaps), that there's an outfit in Sydney called Cathouse Spares who can provide you with a STAINLESS STEEL replacement pipe (and header tank as well). If you're planning on tackling this, now might be a good time to order up the replacement components before disassembling everything. There's also a writeup in Kirby's book.
After removal of the coolant crossover pipe, I beadblasted the entire thing,
then repainted it.
As I had purchased about a foot of the hose for either side of the coolant
crossover pipe (where it meets up to either head), I had an available length
to use for the crossover mod. By cutting the crossover pipe near the water
pump fitting, the installation is GREATLY simplified. By using good hose
clamps, the crossover pipe doesn't lose much rigidity. If you wanted to be
really retentive, you might even consider a metal sleeve, with an ID to
match the OD of the crossover. You could slip that over the crossover, then
slip the heater hose over that and clamp it. Another thing to do (if you
have the equipment, or the time to take the crossover to the appropriate
shop) is to get the fitting threaded on the outside. By doing this, you
could then thread a coupling over the two pipes (after treating the threads
with an appropriate sealer). The hose seems to work just fine.
Overview of the coolant crossover modification with the connecting hose
clamped on. This was BEFORE I realized that one of the clamps would
interfere with the travel of the (not yet reinstalled) belt over the AC
clutch.
As mentioned above, OOPS. This wasn't fatal - I just had to rotate the
clamps to screw from the backside of the crossover pipe (between it and the
block). However, as I show below, making the cut just a little closer to the
vertical pipe to the water pump would take care of this clearance issue.
See the totally vertical mark? That is where I cut mine. However, about an
inch to the right of that, there's a mark here on the top of the pipe. This
would be a much better place to cut the pipe, as you'd then be able to clamp
it entirely away from the vertical of the A/C clutch belt. When I eventually
revisit the crossover to replace it with a stainless steel version, I'll cut
it there.
Sean B. Straw
EMail to: Sean.Straw+Jaguar@mail.professional.org