1993 Yukon crate motor hydraulic roller lifter cleaning and adjustment journey - (Solved)

[scott2093]

I can do that for you if you'd like, just let me know what you'd like the title changed to.

HHmm. It's definitely derailed from the original title.. Maybe I can get some other feedback first but...

1993 Yukon crate motor hydraulic roller lifter cleaning and adjustment journey

Seems encompassing and relevant enough?

 

[df2x4]

Should be good to go now, let me know if you need anything else!

 

[Road Trip]

HHmm. It's definitely derailed from the original title.. Maybe I can get some other feedback first but...

1993 Yukon crate motor hydraulic roller lifter cleaning and adjustment journey

Seems encompassing and relevant enough?

I can do that for you if you'd like, just let me know what you'd like the title changed to.

How about adding this at the end?

"1993 Yukon crate motor hydraulic lifter cleaning and adjustment journey - (Solved)"

From personal experience whenever I'm doing research on the interwebs if I see a thread
marked 'Solved' I usually gravitate towards that for obvious reasons. If we can steer some
of the DIY 'ticking lifter' traffic towards this thread the better for all involved. :0)

BTW, a tip of the hat to @df2x4 for helping to make this forum one of the best online
environments there is. It's appreciated. (!)

 

[scott2093]

You have my vote...
Or maybe we should wait a week? ..lol
Here are the final hot running lash adjustment pics.
Didn't expect to see some the way they look...
I'll upload the cold adjustment pics in a bit. And get my notes together to fill in the sheet....

I think I have the pics from before I removed the lifters. Not sure if other ones in the thread reflect that stage since I was jumping around so much....

 

[scott2093]

Here's the adjustment cold right after cleaning lifters using the method Schurkey recommends.
My notes say I did 1/4 turn. Interesting.
I'll need to go through my voice recordings to see how things went from there to the hot lash..

 

[df2x4]

How about adding this at the end?

"1993 Yukon crate motor hydraulic lifter cleaning and adjustment journey - (Solved)"

Great idea, added.

 

[scott2093]

So my video where I took the rocker nut photos of the Schurkey method says I was at 1/4 turn past zero lash.

But my audio recording of doing the hot running lash says I was starting at 1/2 turn past zero using the cold method.

Can't remember if I tweaked another quarter turn after doing Schurkey's method but it's very possible.

Judging from the notes, it definitely would appear at least it was readjusted hot coming from 1/2 turn preload.

Just couldn't tell you if the pictures of the Schurkey method are at 1/2 turn past zero. I was pretty tired and could have said it wrong in my recording...
But anyway, here are the notes. Didn't realize I goofed the instructions on these worksheets earlier in the thread until now.
The end

 

[scott2093]

I've mentioned it earlier somewhere in this thread how the thread count showing when I went to first start my initial intake gasket job looked.


Truck has been having a couple taps at startup. I know it's "normal". Today when leaving a parking spot it tapped for a good minute or so and then quieted down.....

It just bugs me because it has never done this before. Ever. Not until I messed with the lifters....

I'm going to open it up again and go tighter than the half it's at.
Obviously I don't know what lifters these are. Reading some older articles there are a lot of guys saying 1 1/4 turns to 1 1/2 turns for hydraulic rollers or else they are noisy....
Looking at the threads in the pre work picture, it does seem like they are pretty turned?

Idk... You think turning each a quarter turn slowly while the motor is running would give me any clue as to how it's going to feel if I go past 3/4?

Something is telling me the truck may want to be running past a full turn but idk.... I wasn't liking how it was feeling at 3/4 but it was quiet from what I can remember....
It's like the truck is learning as it goes and getting a little worse feeling from it's initial test drive too...

Oil pressure seems good... Not used to seeing 20 at idle...but it's 40 ish driving normal...

definitely nervous to just open covers, go another 1/2, then start the motor....??

edit////Did another 3/16 turn and it seems really nice.... Will see tomorrow...

 

[Schurkey]

I have no idea how lifters that have the plunger adjusted somewhere within their range of travel can be more or less noisy by moving the plunger somewhere else within their range of travel.

Far as I know, if the lifter plunger is anywhere within it's range of travel--not topped-out, not bottomed-out--full of oil, not air, not foamy oil, it's as quiet as it's going to get.

The trick is to figure-out what the range of travel is. I've seen hydraulic lifters with a few thousandths of travel, and I've seen some with over a quarter-inch of travel.

 

[scott2093]

I have no idea how lifters that have the plunger adjusted somewhere within their range of travel can be more or less noisy by moving the plunger somewhere else within their range of travel.

Not sure. I can't believe I could be so crazy that I'm floating around before zero lash...

But it's not so much about how quiet they are while running , though I believe there is some differences when maybe too close to zero lash, but it's more the question of why they tend to want to be noisier at startup with different preloads if that makes sense.
Guess I'll find out tomorrow after it's been sitting overnight and when I get it on some inclines parked...
Maybe just a bunch of coincidences ..

what do you mean travel? I mean I can push the plunger 1/4" ish when they're not pumped up...maybe 3/16"....it was quite a bit...