Need Help with 340 Six Pack Valve adjustment

[amoparman]

Hey all!
I need some help with a friend of mines T/A 340 6pk car. He has been having trouble with the valve lash adjustment and is at his wits end. I have only delt with hyd cams and very few mechanical cams, and I think that the 340 T/A is a different animal.
Can any of you walk me through this so I can help him with it? I can do this, and if it was a straight up mechanical cam I wouldn't have a problem with it. But he's talking about some wierd stuff with it.

Thanks in advance for any help


Stretch

 

[eddie102870]

dont know but i got a brand new still in box set of aluminum valve covers ill sell him i went a different way. i gave over 300.00 for them i think and ill take 100.00 for them. they look like these but made by moroso and are shinier

 

[Silverback]

Hey all!
I need some help with a friend of mines T/A 340 6pk car. He has been having trouble with the valve lash adjustment and is at his wits end. I have only delt with hyd cams and very few mechanical cams, and I think that the 340 T/A is a different animal.
Can any of you walk me through this so I can help him with it? I can do this, and if it was a straight up mechanical cam I wouldn't have a problem with it. But he's talking about some wierd stuff with it.

Thanks in advance for any help


Stretch

I'm sorry Stretch, I'm confused? Can you define "..wierd stuff..."?:dontknow:

 

[TheSickness]

Sounds like a job for Mr. Mopar himself.......PM Begood Stretch he will help you

 

[rottenronnie]

Hey all!
I need some help with a friend of mines T/A 340 6pk car. He has been having trouble with the valve lash adjustment and is at his wits end. I have only delt with hyd cams and very few mechanical cams, and I think that the 340 T/A is a different animal.
Can any of you walk me through this so I can help him with it? I can do this, and if it was a straight up mechanical cam I wouldn't have a problem with it. But he's talking about some wierd stuff with it.

Thanks in advance for any help


Stretch

#1 TDC Firing Intake: 2&7 Exhaust: 4&8
Rotate 180 degrees CW (from the front) to
#4 TDC Firing Intake: 1&8 Exhaust: 3&6
Rotate 180 degress CW to
#6 TDC Firing Intake: 3&4 Exhaust: 5&7
Rotate 180 degress CW to
#7 TDC Firing Intake: 5&6 Exhaust: 1&2

Ron

 

[amoparman]

Ok, further explanation....
I got the adjustment order and all. That's the easy part. He was talking about some engines had solid cams and some hydraulic but with different lifters hence different lash settings. Like the difference between pre-load and an actual solid tappet cam where valve lash is around .12 - .18 or so. Would need the book for the specs which I don't have in front of me. I'm a big block guy so I don't have very much small block knowledge.

Thanks for the help so far...



Stretch

 

[AWDisuzu]

never perform maintenance that you're not familiar with!

Hey all!
I need some help with a friend of mines T/A 340 6pk car. He has been having trouble with the valve lash adjustment and is at his wits end. I have only delt with hyd cams and very few mechanical cams, and I think that the 340 T/A is a different animal.
Can any of you walk me through this so I can help him with it? I can do this, and if it was a straight up mechanical cam I wouldn't have a problem with it. But he's talking about some wierd stuff with it.

Thanks in advance for any help


Stretch

 

[rottenronnie]

Ok, further explanation....
I got the adjustment order and all. That's the easy part. He was talking about some engines had solid cams and some hydraulic but with different lifters hence different lash settings. Like the difference between pre-load and an actual solid tappet cam where valve lash is around .12 - .18 or so. Would need the book for the specs which I don't have in front of me. I'm a big block guy so I don't have very much small block knowledge.

Thanks for the help so far...



Stretch

Well. you can adjust hydraulic lifters too, if the rockers are adjustable, like the 426 Hemis. I used to pull the intake and used a wire gauge between the snap ring and lifter body to set the lash.

I am not sure what you are dealing with on that 340; some bizzare combinations can be created with an engine that has been around that long.

A quick test: push down on the back of the rocker that houses the pushrod. Does it FEEL solid or is there some give to it. If it feels solid, it probably is a solid cam. Crude but effective...

I have seen 340 and 360s that someone has used the 273 HP adjustable rockers on and assumptions are made that cam is a solid (when it isn't) and vice versa.

Find out what you have there and then you can proceed.

I have even seen a solid grind cam that had hydraulic lifters (that was interesting).

Ron

 

[amoparman]

Well. you can adjust hydraulic lifters too, if the rockers are adjustable, like the 426 Hemis. I used to pull the intake and used a wire gauge between the snap ring and lifter body to set the lash.

I am not sure what you are dealing with on that 340; some bizzare combinations can be created with an engine that has been around that long.

A quick test: push down on the back of the rocker that houses the pushrod. Does it FEEL solid or is there some give to it. If it feels solid, it probably is a solid cam. Crude but effective...

I have seen 340 and 360s that someone has used the 273 HP adjustable rockers on and assumptions are made that cam is a solid (when it isn't) and vice versa.

Find out what you have there and then you can proceed.

I have even seen a solid grind cam that had hydraulic lifters (that was interesting).

Ron

Kind of what I think we are dealing with here. A Hyd cam with adjustable rockers. I might get a crack at it tomorrow. Adjusting valves is adjusting valves, or at least it should be...

 

[Begood]

Hey Stretch what kind of rocker arms does it have?

Bill.

 

[Begood]

Also is this an orginal 340 Six Pack engine? They were only installed in the 70 Cuda AAR, and the 70 Challenger T/A.
Does it have the real AAR-T/A heads? Or the "X" heads, or the "J" heads?

Bill.