I have a good friend and family member that didn't know about this so while I was working on 1 head, I had my son video me bleeding an HLA so all can see how it is done.
Pops
Pops
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How to Bleed your HLA's (lifters) đź‘Ť
- Thread starter1990TSIAWDTALON
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steve
DSM Wiseman
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St. Charles,
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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.
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1990TSIAWDTALON
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Independence,
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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
Thanks for the comments, "cheater"
Marty
steve
DSM Wiseman
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St. Charles,
Illinois
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)
From the 91 3000GT FSM Volume 1 (We use the same HLA's as the 6G72 DOHC)
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1990TSIAWDTALON
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Nice addition to the thread Steve! 
Thanks!
Thanks!
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1990TSIAWDTALON
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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
I appreciate the additional info you provided!
Marty
pauleyman
DSM Wiseman
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oklahoma city,
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I concur. Spongy HLA may rattle for a minute or two but that's it. Much rather hear that than valves hitting pistons.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
chrysler kid
20+ Year Contributor
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Mckinney,
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I always install the lifters pre bled submerged in a cup of oil, and pumped hard prior to install. I’ve never had issues with lifter noise
To be technical you didn’t bleed the lifters in the video, you drained them of the oil and now you have to wait for oil flow into the head to fill them which will cause lifter rattle on the initial start.
Bleeding them to me means you are removing air from the lifters to fill them with purely fluid, just like bleeding brakes. In the video you are draining the lifters
To be technical you didn’t bleed the lifters in the video, you drained them of the oil and now you have to wait for oil flow into the head to fill them which will cause lifter rattle on the initial start.
Bleeding them to me means you are removing air from the lifters to fill them with purely fluid, just like bleeding brakes. In the video you are draining the lifters
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1990TSIAWDTALON
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To each their own. Most folks understand the concept, which is all the video was for. Those were old and dirty lifters as an example for a family member to see so he understood HOW to release the pressure from the HLA's. We talk on the phone, not here, so he gets the rest of the explanation and doesn't end up with more bent valves.
Do whatever makes you feel good and prevents engine failure. I always leave mine spongy. They pressurize right up when the engine starts cranking and making oil pressure.
For those "AI" guys, I added a picture of what it will tell you if you ask about "bleeding a lifter" on an engine. Trapped air will compress, trapped liquid will not.
Marty
Do whatever makes you feel good and prevents engine failure.
I always leave mine spongy. They pressurize right up when the engine starts cranking and making oil pressure.For those "AI" guys, I added a picture of what it will tell you if you ask about "bleeding a lifter" on an engine. Trapped air will compress, trapped liquid will not.
Marty
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pauleyman
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I'm going to agree with Marty. I've seen a valve hang open first hand from lifter that were not bled down. Oil, not air. I was taught this from a mitsu mechanic. I watched him start up fresh set and as you stated it made some noise upon first startup. He revved it for a little bit and it all settled down as it should. Every motor I've built and every lifter I've installed from a top end rebuild etc or just maintenance did the same thing. It isn't a big deal. To me a hung open valve is a big deal.To each their own. Most folks understand the concept, which is all the video was for. Those were old and dirty lifters as an example for a family member to see so he understood HOW to release the pressure from the HLA's. We talk on the phone, not here, so he gets the rest of the explanation and doesn't end up with more bent valves.
Do whatever makes you feel good and prevents engine failure.
For those "AI" guys, I added a picture of what it will tell you if you ask about "bleeding a lifter" on an engine. Trapped air will compress, trapped liquid will not.
Marty
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