bertvorgon wrote:Maybe you do not know..but...you can shim that pump. behind that BIG nut head is the blow off spring. If you put a very thin washer there, that will give you more oil pressure. Start THIN so as not to blow up the oil filter....
Good call Keith. I've heard of the shimming trick but didn't want to 'hack' a solution. But I'm now much more flexible (read: desperate) as it turned out the Lucas stabilizer hadn't fully resolved the tick. I dropped a .040"/1mm shim in the new pump and it was good for ~8psi. I'm now running about 62-63psi hot when cruising. For noobies, the shim goes in the hollowed bolt head where the screwdriver is pointing - photo borrowed from a nice member on Ratsun.
I finally pulled the valve cover off and noticed 2 things:
- 1 - #3 exhaust was not well pressurized and likely the cause of my repeated ticks. I'll go ahead and order a new #3 exhaust rocker/lifter - that will be my 3rd and I'm starting to wonder if there's an oil flow/pressurization issue there in the head...
2 - Intake valve 1 on #3 had damn-near 2mm of lateral play on the rocker arm shaft due to the clip being flared for some reason (proper FSM torquing procedures were used in the past). I managed to pinch the clip tight with channel locks and all seems well.
I also dumped the 10w40 oil with Lucas supplement and when with brand new heavier weight 20w50 Castor GTX, along with a new Mobile 1 filter. The next morning after I let it idle with a light tick for 15-20 min before I took it out for a good hour of silence, including a couple of sustain highway runs which typically cause the issue to resurface. My fingers are crossed this is finally it.
On another note, my filler neck solution appears to be working well once I solved a couple teething issues. I managed to POR15 a little of the intake lip which cause the cap to not seal properly unless I really tighten. I'll sand the paint down in the near future. Also, I reused the existing breather tube which proved to be too old and split where I flared a shortened portion onto the fuel tank. Fuel was coming out quite easily before my nose caught it. I've taped it up for now but will want to find a better solution, any idea where I can get a new one?
Finally, with the battery in the spare well I was getting sick of not having proper support in the trunk for heavier items. I didn't want stuff resting directly on the battery or risk shorting.
So I fabbed up something quick that fastens to the spare wheel hole.
It's not pretty but it holds plenty of weight now and keeps the battery isolated from other items I store beneath the cover..