3rd gen valve adjustments

[Gil Moncrief]

I could find out what DC recommends for valve adjustment intervals on the third gen engines, but I trust the TDR members recommendations more. What say you?

 

[mberry]

For the '06's I believe it's either 100K or 150K miles. I can't remember the exact number.

 

[Bob4x4]

Forget about what is recommende,just do it:-laf You can feel the diff in many trucks.



Bob

 

[PRawls]

Exactly what does that entail?

 

[WCounts]

I could find out what DC recommends for valve adjustment intervals on the third gen engines, but I trust the TDR members recommendations more. What say you?

I think it's 125k miles for normal driving. If you have a hr to burn I would do it. They will probley be in spec.

 

[Bob4x4]

I think it's 125k miles for normal driving. If you have a hr to burn I would do it. They will probley be in spec.

They are adjusted my machine I have not done any that were set at prefered clearance... ... ... ... ... ... . and I have done MANY. With-in spec vs where it should be is a big diff.



Bob

 

[AKaiser]

150,000 miles schedule A, 135,000 miles schedule B according to DodgeRam. info. That's for 24V, but not sure if the exact numbers carried over to the last 5. 9s. I'm pretty sure the 150,000 is correct.

 

[BarlowCummins]

I have also been considering getting a valve adjustment done. I am constantly towing heavy trailers (10,000lbs-40,000lbs). What kind of differences will you see from doing a valve adjustment?

 

[CBrahs]

Hey Bob4x4,

How many of the new trucks have you seen with low mileage have valve noise? I have a concern and the dealer told me that they would not adjust the valves because it was an "adjustment". They would not adjust them until I had 15k miles or more. Have 7700 now. What ya think I should do?



Chris

 

[HighRanger]

I have almost 50k, time to adjust?

 

[JApol]

I have 38k on mine and I hope to do it this weekend

 

[Tryingit]

I adjusted mine at 40K. I have never done anything like that before. I had a friend help out. It took about two hours and one special tool, a barring tool but you don't even need that. Someone here has detail instructions with pictures. The truck was much quieter after the adjustment. Oo.

 

[pwr2tow]

The 06 trucks exhaust valve is clearenced at . 026 instead of the normal . 020 Not sure when that clearance started. Maybe bob4x4 can chime in.

Hey bob4x4 if you do read this what would happen if someone clearanced the exhaust valve on a 06 to . 020? Would the 06 run cooler? If so would it hurt the cat?

You also referenced the "With-in spec vs where it should be is a big diff. "
could you elaborate a little more? Thanks.

 

[Bob4x4]

VALVE LASH LIMIT CHART INTAKE EXHAUST

0. 152 mm ( 0. 006 in. ) MIN. 0. 533 mm (0. 021 in. ) MIN.

0. 381 mm (0. 015 in. ) MAX. 0. 863 mm (0. 034 in. ) MAX.

NOTE: If measured valve lash falls within these specifications, no adjustment/reset is necessary. Engine operation within these ranges has no adverse affect on performance, emissions, fuel economy or level of engine noise.





This is a quote from an 06 factory publication,notice the huge acceptable range. I have had 2 07 5. 9's with under 15 miles on the clock have pushrods come out of the rocker they were so loose. I don't think I would call that an accurate setting.

Most all trucks will idle smoother,some will run out better some even see better mpg. I promise nothing but a smoother idle but some are out worse than others.



Bob

 

[Bob4x4]

Hey Bob4x4,

How many of the new trucks have you seen with low mileage have valve noise? I have a concern and the dealer told me that they would not adjust the valves because it was an "adjustment". They would not adjust them until I had 15k miles or more. Have 7700 now. What ya think I should do?



Chris

Honestly not many people I have seen do an accurate v/adj. I say do it right or leave it alone. If it were mine I would do it myself.

I have never seem D/C authorize a valve adjustment under warranty unless there was a verifiable concern.

. You may not even want one done under warranty for what the tech would be paid. Care and concern cost more than what D/C is willing to spend in most cases.

 

[Bob4x4]

Hey Bob4x4,

How many of the new trucks have you seen with low mileage have valve noise? I have a concern and the dealer told me that they would not adjust the valves because it was an "adjustment". They would not adjust them until I had 15k miles or more. Have 7700 now. What ya think I should do?



Chris

One more thing adjustments that are legit are only 12/12,maybe that is why they said come back at 15k:-laf



Bob

 

[Gil Moncrief]

Thanks for the replies. I never trust DC to do careful adjustments. I have 24,000 K on my 06. I will be doing it soon, for my own peace of mind.

Bob, do you recommend shooting for the middle of the spec or tighter?

I have always set mine at the . 010 and . 020 on my earlier 12 valve trucks. This is my first 24 valve.

 

[Bob4x4]

I have always used 8-18 in the others with great results. The 06 they must be trying to protect the exhaust seat and valve from temps.



Bob

 

[pwr2tow]

Wouldn't a looser setting create more heat as the gases would stay in the cylinder longer?

I was told the reason for the looser . 026 setting on the 06 trucks was to build heat so the kitty would live longer.

 

[Bob4x4]

Think valve temp not cylinder.