After another evening out in the car, enjoying the fruits of many endeavours(!), I opened the bonnet to check all was OK only to find a little smoke haze coming off the exhaust manifolding.
Following it through under the car, I found both the inner front plate securing screws, the ones that go into the aluminium bearing cover plate, loose. One was held in with a bit of Sika, the other, with slightly less badly worn threads, unable to tighten without further stripping, which I promptly did….
Into the garage and the dismantling began. Draining of the coolant and removal of the radiator. Fan belt removed after loosening the alternator and thus access to the fan bolts was made easy. This was removed along with the damper bolt that took a couple of shots with a rattle gun and the pulley was free. With the damper removed, it showed that the new double lipseal on the timing cover was dry and access to the holes for repair was easy. I checked the holes were still ‘blind’ with a toothpick and will use a couple of new 5/16 screws along with some Loctite 577 to make sure there’s a good seal.
I ordered a 5/16 UNF Helicoil repair kit and a 90-degree drill off Amazon – there’s not enough room to drill end on with my standard drill to allow the new thread for the Helicoil to be fitted.
They consequently arrived from Amazon and I set to on the job. The kit worked well – drill out, tap with a bottoming tap then screwing in the Helicoil after a dab of Loctite red threadlock. The tang on the coil snapped off when it reached the bottom of the thread – no need to punch it off. The new stainless screws should arrive this week and it should be job done.
I have a viscous fan conversion kit from Chris Witor to fit on the reassembly so, I separated the fan mount from the damper using a punch and hammer and swapped it with the NOS adaptor from Chris. I locked the crank with the car in 1st gear, handbrake on and torqued up the centre bolt to 90 ft/lb. Radiator went in next, lowered onto a trolley jack set to the right height and with an old T-shirt between the rad and the fan to allow the bolts to be fitted without having to try and hold it up at the same time… I’ll be interested to see how the visco fan copes with the traffic and heat down here at the moment – it’s 30+C for the foreseeable and the tourists have arrived! It seems quite ‘stiff’ at the moment, not really going to freewheel much that I can see unless the rpm gets up there and the load comes on the fan blades.
With the new silicone hoses connected, I topped up the radiator with the previous charge of Evans Waterless Coolant and that was that. A quick run up at idle to ensure all was bled through the heater etc and set to go.
I was looking around for something else to fix and eyes turned to the windscreen washer bottle and pump… It’s been pretty poor since I had the car – not sure if it’s supposed to be any better or not however, I thought I’d overhaul the pump.
Removing the pump motor from the bottle cover and opening up the electrical box showed a bit of gunk around the rotor and some build up on the commutator. I cleaned all the bits up, found some 50 year old graphite grease squirted into the upper rotor bearing non too accurately and a little corrosion on the field magnet plates.
A good clean up with electrical solvent, a wire brush and a pick brought the parts back up to good condition and I re-lubed the rotor shaft bearings with Molykote and reassembled the motor. I also removed and cleaned the gauze from the water suction into the pump and checked all the pipes were clear. Reassembly and back on the car, I have a faster pump and a little better flow. I think removal of the jets and a wash in the ultrasonic bath will be the final job to get best possible operation now….