Engine/Transmission (1994 - 1998) Disadvantages to 60# springs

[Israelson]

I'm planning to installing 60# exhaust valve springs next weekend in preperation for an exhaust brake. I was just curious if there are any disadvantages to using these springs, why did they not come stock that way? It may be awhile before I get the exhaust brake and I don't think I'll be using it much when I have it, just for the times I go RVing, If there is a drawback like increase wear on the rockers or something like that I may just wait to install them.



Thanks Erik

 

[bighammer]

I would think that there would be an increase in friction, wear, and stress on the parts of the valvetrain, but it would be VERY minimal.

 

[Scot]

I called PDR some time back and asked them that question. They said that the #60 springs are stock in other applications. By definition, there will be more wear on the valvetrain, but I would not worry.

 

[y-knot]

I thought about that also, and when I was to have them installed for the pac-brake, I even asked if it would be wise to install 60# springs on both intake and exhaust. They said no gain, not a problem only on the one side. I new the more the tension, and more stress and wear on the cam loobes, rocker arms, push rods. But my concern was that should the forces be equal, meaning both exhaust and intake. I was worried about pressures being the same, and harmonics.

 

[TPCDrafting]

Erick, Plan on using your Ex-brake every time you use the truck. It is actually better for the life of the brake to use it on a regular basis. Some who don't end up with stuck brakes and less performance due to moving parts getting stopped up.



Make darn sure you have your pistons at or near TDC prior to releasing the valve keepers. If not, the valve will drop down into the cylinder and you now would have a much larger project than before. (Don't ask why I know this either:{ )

 

[MCummings]

Originally posted by Scot

By definition, there will be more wear on the valvetrain, but I would not worry.

Not as much damage as floating valves, or valves and pistons trying to occupy the same space at the same time.



I think 24V's come factory with 90Lb springs, and I know a guy that is running 200# Valve springs in his 24V to keep form floating the valves at the 130PSI of boost he's running.



Merrick Cummings Jr