Engine Polly locks

JungleJoe · Dec 28, 2020

Hey guys.. 302, twisted wedge heads, 1.6 roller rockers...
I've got a situation here.. the polly locks keep coming loose.
Here is how I adjusted the them.

Get zero lash, go 3/4 turn(my cam specs says do that) then lock the Allen head down.
Idle time ONLY they are coming loose. When I say loose... the allen locking nut is backing off.
What am I doing wrong?

CarMichael Angelo · Dec 28, 2020

JungleJoe said:
Hey guys.. 302, twisted wedge heads, 1.6 roller rockers...
I've got a situation here.. the polly locks keep coming loose.
Here is how I adjusted the them.

Get zero lash, go 3/4 turn(my cam specs says do that) then lock the Allen head down.
Idle time ONLY they are coming loose. When I say loose... the allen locking nut is backing off.
What am I doing wrong?

your cam is going flat.
And..
Polly is a Parrot.
It’s “ Poly”.

JungleJoe · Dec 28, 2020

The cam is brand new and definitely have not wiped a cam lobe off.

CarMichael Angelo · Dec 29, 2020

JungleJoe said:
The cam is brand new and definitely have not wiped a cam lobe off.

is your cam a roller, or a flat tappet hydraulic roller?
And,..one of two things..

1. You aren’t getting the set screw tight enough.
2. Your brand new cam is failing. ( That’s usually when they fail)

JungleJoe · Dec 29, 2020

CarMichael Angelo said:
is your cam a roller, or a flat tappet hydraulic roller?
And,..one of two things..

1. You aren’t getting the set screw tight enough.
2. Your brand new cam is failing. ( That’s usually when they fail)

Hydraulic roller. Ive reset it twice now. Only idle time. After I set the valves and lock the poly locks down.. I started it to make sure everything is doing whats its suppose to, the valves appear to be opening the same.
Going to take it apart today and inspect them and try a different method.
Set zero lash.. go my 3/4 turn on the lock screws on the studs, back off about a 1/16th set the poly lock.. then turn both thw poly lock and locking screw back thw 1/16th. May even put some loctite orange on them. Seems to be only two coming loose..ill see when I pull the valve cover off later today.

Monkeybutt2000 · Dec 29, 2020

JungleJoe said:
Hydraulic roller. Ive reset it twice now. Only idle time. After I set the valves and lock the poly locks down.. I started it to make sure everything is doing whats its suppose to, the valves appear to be opening the same.
Going to take it apart today and inspect them and try a different method.
Set zero lash.. go my 3/4 turn on the lock screws on the studs, back off about a 1/16th set the poly lock.. then turn both thw poly lock and locking screw back thw 1/16th. May even put some loctite orange on them. Seems to be only two coming loose..ill see when I pull the valve cover off later today.

Curious why you're doing all that extra work. I set to zero, 1/2 turn,then with wrench on poly I crank down on the allen screw. A little tread sealer wouldn't hurt but they shouldn't back out.

a91what · Dec 29, 2020

Agreed, I do use a 3/8 drive allen socket though.. more torque applied

JungleJoe · Dec 29, 2020

Monkeybutt2000 said:
Curious why you're doing all that extra work. I set to zero, 1/2 turn,then with wrench on poly I crank down on the allen screw. A little tread sealer wouldn't hurt but they shouldn't back out.

Well..the reason I'm having to do this again..They rockers came loose. I assume I didn't get the set screw tight..or something. Not sure. But this time around.. im backing the adjuster nut off a 1/16th or more, setting the allen head set screw, then tightening both of them together that extra 1/16th. Feels pretty damn tight this time around

JungleJoe · Dec 30, 2020

I went through all the valves yesterday and adjusting them the new method. Fired it up seems to be working.
Only one on the driverside was loose. But I did the passenger side also. Fired it up whisper quiet. At least in the front of the truck.

Engine Polly locks

JungleJoe

I was like well chit..Im missing something

Attachments

CarMichael Angelo

my rearend will smell so minty fresh,

JungleJoe

I was like well chit..Im missing something

CarMichael Angelo

my rearend will smell so minty fresh,

JungleJoe

I was like well chit..Im missing something

Monkeybutt2000

Mustang Master

a91what

SendMeUrDataLog

JungleJoe

I was like well chit..Im missing something

JungleJoe

I was like well chit..Im missing something

Similar threads

Engine Polly locks

I was like well chit..Im missing something

Attachments

my rearend will smell so minty fresh,

I was like well chit..Im missing something

my rearend will smell so minty fresh,

I was like well chit..Im missing something

Mustang Master

SendMeUrDataLog

I was like well chit..Im missing something

I was like well chit..Im missing something

Similar threads

Privacy & Transparency

Privacy & Transparency