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Another yellow fan and clutch replacement. Hairline cracks and small chunks missing. Very worth the hour's worth of work.
And the clutch was completely seized up.
After the first test drive, wow, I didn't realize how loud the fan was with it spinning all the time. I can hear the engine now, trans shifts better because it warms up faster. Big diff.
Made new brake lines, fitted them mostly, need to finish printing some retainer clamps for securing along the floor, fuel line looks OK even where brackets were so not replacing, doing some programming / experimenting now for the fans.
In july
If anyone knows how to size the banjo please advise or are all banjos 1 size?
I changed the inlet side of the breather pipe to 6mm copper 6mm o/d and drilled the bango to the max soldered a straight brass coupler to the hose end, and it now hasn't ever releases water from the centre rivet on the filler, and wont get rusted up any more. 😊
I'm intrigued by the shiny part near the engine. Did you mod the pipe because of a problem with corrosion? - I bought a new banjo bolt and spacers for that location that supposedly fixes the internal alignment issues but I hadn't considered messing with the pipe.
I completed my fan experiments, this is all very Heath Robinson but the fan controller is alive, reading temperature sensors and driving the smaller of the fans that will be going into the car, time to scale up. Currently on half load the 12" fan pulls only 3A, on 25% duty it draws only 1A, but is rated at 15 - the benefits of PWM / H-Bridge control - I can't run any harder as the prototyping wires get too hot to hold but it is all feasible.
The black clips on the brake pipe are for under the car - not part of the fan control.
Programmed for 3 temperature sensors - 1 return and bank A, bank B flow temperatures, current sensing for both fans, have enable input from AC and also a high temp inline stat although the temperatures fail high, currently only control the fans using return temperature, they're sequenced and don't necessarily both run. The fans start at the lowest speed possible to avoid the fan motor stalling ramping to flat out by an adjustable value, need to play with this but I want to make sure the thermostats stay fully open so I'll likely include the bank A and B flow temperatures somewhere in the control strategy. The controller won't be living under the bonnet but inside the car somewhere, I also intend to add some form of data logging to it.
Some of this is 'because I can' and other aspects are to reduce power consumption to a minimum although I now have a 120A alternator too, I also want to see any discrepancies between banks which may indicate some issue i.e. misfire / lean / rich etc etc.
The fans mocked up on the shrouds are below, I am leaning toward using the larger of the two fans on low speed for AC unless it over cools and perhaps vary it based on condenser output - these things I need to decide - I'm also toying with the idea of both fans to full speed on engine shutdown to dissipate under bonnet heat for a time.
The shiny bit is just a stainless drive belt guard I knocked up as the mech fan has gone along with the drive belt and it all looked a bit empty. 😊
i fitted over the counter fans from the states the fans only lasted a couple of years,so i fitted a decent make ones, Spal, straight blade. One other advantage i found was i managed to change the crank seal with nothing having to be removed..
While soon I'll have to start a restoration thread, I'll post here that today I made it to step 72 out of 85 in the jag manual for removing the engine and transmission! The plan is to remove the engine then drop the front sub-frame and the IRS.
while its off the road for a couple of months i thought i would complete the front power washers, i was running with 2 washer bottles one for windscreen and 1 for h/lamps, i extended the wiring and purchased a new pump for the reservoir only trouble was the wiring plug sticks out and and the baffle is stopped from fitting properly, i need to cut the baffle and bond a tobacco tin on it, just waiting now for new 4mm (or whatever) tubing for the w/washers, the vacuum tank was removed to the other side were the fittings are already there probably for lhd cars, it will be moved to the old washer bottle location but i may invest in a custom stainless tank for that...
since writing this i have purchased the jaguar pump from manners which is cocked round to the side.
I looked at it - apologised - and walked away - too damp, too windy, too damn cold - I can't see much more happening this side of 2022. I removed pretty much all the tools and put away in the house - winter condensation sucks - everything was covered and damp. I don't really have much left to buy for it either other than a stainless exhaust.
What I wouldn't give for a decent man cave with vehicle lift, good lighting and heating. Forty years back I'd have been out there and not given a damn ... how life changes perspectives.
OK, all you guys with pre 1987/88 V12 HEs with the speed control switch in the gearbox script plate, read and weep!
This plastic plate is very weak and the thin side breaks and the thing cracks over time. Absolutely NLA, and I tried to get one made but nothing doing.
Anyway, looking at Ebay a week ago I saw a job lot of bits for sale, ALL NEW at that, light lenses etc etc, and Lo and Behold, nestling in the tiny photo of all the bits was a gearbox script. Now, to quote Sir Michael Caine, not a lot of people know this, but there are TWO versions, nearly identical one spaced for the BW 66 gearbox in the earlier saloons, and one spaced for the TH400 in later saloons and all HE XJSs with the TH400. I found this out the hard way, having a new BW66 version that I do not need!
I reckon this TH400 one I found must be the last new one in the world!
I could not see the spacing, so I took a chance and got the lot for 10 UKP. Anyway, it turned up and miraculously it IS the right one for the TH400. Fiotted today to replace my old cracked one!
New script installed BW 66 spacing TH400 spacing
Last edited by Greg in France; 11-13-2021 at 07:32 AM.
10-09-2021, 03:36 PM
Yellow fan
