273 rocker losing adjustment
- Thread starter Uncle Bob
- Start date
-
I mentioned using loctite 61 threads ago but wasn't aware of an orange loctite.
gzig5
Well-Known Member
Wrong application for Loctite. Mechanical interference is the only reliable fix.
Or a welder!
jeff alder
Well-Known Member
It only took 4 pages for someone to make the adjustable rocker nonadjustable...LOLOr a welder!
Uncle Bob
Shiny paint causes stress.
Hey
I forgot to take a photo of the bolt and all the oversized nuts (spacers) and washers it took to use the 2" bolt.
Just gotta adjust the in/out. You can see one of the fender washers.
I surrounded it with a box because it's making a mess
There you go I tried to smooth it out a little but that didn't help much before the cookie gave up.
To fix the top of the threads chase them through from the bottom
W00t.
There's no need to check the nut in progress, just go until it's all the same shiny and you're done, next.
I forgot to take a photo of the bolt and all the oversized nuts (spacers) and washers it took to use the 2" bolt.
Just gotta adjust the in/out. You can see one of the fender washers.
I surrounded it with a box because it's making a mess
There you go I tried to smooth it out a little but that didn't help much before the cookie gave up.
To fix the top of the threads chase them through from the bottom
W00t.
There's no need to check the nut in progress, just go until it's all the same shiny and you're done, next.
Heck yeah! Nice work. Also another trick I use in situations like this. I mark the entire area with black permanent marker that I intend to machine. Then, I machine away barely enough to clean all of the marker off. Sounds like you're pretty much doin that by watchin the area get shiny. Nice work!
abdywgn
dismantler
That is slick! if I get energetic, I may do my rockers
gzig5
Well-Known Member
Why don’t you explain it? Using glue to hold a bolt in place that has too much clearance and which sees significant axial pressure and displacement every rev as well as significant heat, is not a good idea.
Uncle Bob
Shiny paint causes stress.
I've got some spray marking fluid (blue). Same concept as the marker, but easier to use. It's a little messy because it's kind of building up where I bolt the rocker to the press.
Most of them have been pretty much flat to begin with. The driver side bank is done. I'll finish them tomorrow.
Uncle Bob
Shiny paint causes stress.
This is as complicated as the setup needed to be on the drill press.
abdywgn
dismantler
WOW! so simple
Phreakish
Well-Known Member
Cast iron also tends to hold oil. Glue doesn't stick well to oil.
I would have opted for orange loctite too, if I was stuck trying to get the car just a little further down the road.
I have had limited luck using it inside small engines. It lasts a few hours. The blue won't stick unless things are very well degreased and red might as well be welded on small parts. Orange is kind of rubbery and holds better than blue.
On a couple small engines I have used safety wire when I have gotten sick of ripping it apart to reglue.
gzig,
Glue [ Loctite ] is not taking the load. The threads are taking the load....& there a lot in this case. The Loctite merely locks the threads together to prevent vibration/movement from loosening the adjuster.
Glue [ Loctite ] is not taking the load. The threads are taking the load....& there a lot in this case. The Loctite merely locks the threads together to prevent vibration/movement from loosening the adjuster.
Michael Harrington
Well-Known Member
While I suggest the original poster do what they're comfortable with I must say I like the truing up the surface so a lock nut will seat correctly. Type of modification that is Part of original Hot-rodding. Doing this and adding Manton or Smith Brothers adjusters is a real nice upgrade.
gzig5
Well-Known Member
The reason the adjuster is loose and needs to be tightened is that there is excess clearance between the male and female thread. The glue fills this space and temporarily holds it in place. But every cycle the thread is loaded and unloaded axially and that glue film is compressed and released. What is the compressive load rating for Loctite? How many cycles can it withstand? You can't answer because the thread locking products were not designed with this type of application in mind and are not rated as such. They were designed to hold a bolted joint that has attained a reasonable level of torque, which eliminates the backlash. The loose adjuster in the rocker is essentially flopping around and moving, though in small increments/displacement, every time the pushrod comes up.
Best to just agree to disagree.......
Uncle Bob
Shiny paint causes stress.
I cleaned the living daylights out of the rocker and adjuster before putting the lock-tite on. I decided that I would just fix it the hard way and get it over with because it was going to happen again. There were some that still felt loose and I knew that adjusting them later was going to break the bond and cause problems. The decision was easier once I realized a repeatable way to do the spot facing myself.
There's that too. It's kind of fun to make things work. I just wish I didn't have to readjust the valves; that's the hassle.
gzig5
Well-Known Member
Probably. But he's just plain wrong, and propagating bad information like that will eventually damage someone's engine. Anyway, I'm done. Said my piece. Make your choices and take your chances.Best to just agree to disagree.......
HAPPY INDEPENDANCE DAY TO ALL THE FORMER COLONISTS!!
Make your choices and take your chances. Perfect
You won't convince him. He's gotta be right no matter the situation. Locktite is for locking a twisting motion, not for vertical pounding that the rocker adjuster sees. It simply will not last long. Not that it matters, because the OP is fixing it the rightest way possible and doing a nice job.
trapster
Well-Known Member
I think I would add a lock washer to the jam nut. Everbilt 3/8 in. Zinc-Plated Steel Internal Tooth Lock Washers (12-Pack) 828081 - The Home Depot
Don't do that.
trapster
Well-Known Member
-
Similar threads
