'89 roller-cam LA 360 w/Magnum heads - new roller lifters not pumping up
How big is the hole you drilled in the plug behind the tensioner plate? I read the other thread, but didn't see you mention the size. Drilling a hole there, is basically putting a "leak" in the oil galley.
I didn't drill the hole in the welch plug, that came from factory. I drilled the hole in the cam thrust plate in front of it (for without it, the welch plug hole would have little purpose to oil the timing chain). The hole in the plug can't be more than 1mm.
I'm not worried about it. The pressure loss can't be any worse than using the hollow bolt, and the tests I've run beforehand show that neither galley is starving for oil at all.
That's some good detective work right there!
Thanks! I think so too. Wish it hadn't delayed everything this long, but now I know what the engine needs - and I'll be able to sleep soundly on that decision.
sorry for crashing this (indeed very very interessting thread), but how bad, if the plunger is stuck into the lifter when trying to disassemble the lifter. I´m asking, coz i´m just started cleaning mine, and non of the 16 lifters from my engine will allow me to pull that plunger out. cld. it be the reason, that i have put them in solvent and put them i a ultrasonic bath ??
should that plunger move easily ? or is it common to use some "force"
everything else on the lifters works freely an looks nice after the ultrasonic bath - checkball etc..
cld it be that the plunger is hold by something like a "hydraulic vaccumm" ?
In general, getting the plungers out is a pain in the butt, as they
are being held in by vacuum.
I've used a springy (and hardened) U shaped pin spanner (with the pins facing INWARDS so as not to gall the edge of the plunger) placed inside the plunger, and let the friction of the pin spanner trying to spread out as the grabbing mechanism (big PITA, but it works). You can also work a paper clip down into the center while doing this (bigger PITA) to release the pressure on the check valve.
That, and sometimes a stubborn plunger will come out if you bash the lifter head-first into a plank of wood. I don't really suggest it, but if you come across one that doesn't budge, it's a non-destructive way to find out whether the plunger is truly stuck in there. A plunger that isn't stuck should at least move a bit (if not to the very edge of the lifter) if you try this.
It'll keep fighting you all the way out though. Be prepared.
-Kurt