I cheat. If you use Diesel fuel to prime the HLA like they show in the 3000GT FSM you don't have to bleed them down because they will on their own once any pressure is applied.

Does the FSM say that? I just don't trust not having spongy HLA's to start out. Sure they pump up, but they don't butt valve heads, which I have had happen, ONCE.
Thanks for the comments, "cheater"
Marty

It's more what it doesn't say. Note there is nothing about bleeding them after, just getting all the air out.

From the 91 3000GT FSM Volume 1 (We use the same HLA's as the 6G72 DOHC)

Nice addition to the thread Steve!
Thanks!

Well Steve, I used the 3000GT method and I will say, flushing them in diesel fuel (I happen to have some on hand for a brush pile fire) works GREAT. It lubes and cleans. I still "bled" the liquid out but boy did it do a good job on old parts that you would think aren't good anymore.
I appreciate the additional info you provided!
Marty

1990TSIAWDTALON said:

Does the FSM say that? I just don't trust not having spongy HLA's to start out. Sure they pump up, but they don't butt valve heads, which I have had happen, ONCE.
Thanks for the comments, "cheater"
Marty

Click to expand...

I concur. Spongy HLA may rattle for a minute or two but that's it. Much rather hear that than valves hitting pistons.