B series Valve lash adjustment - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 15 (permalink) Old 04-09-2011, 01:03 AM Thread Starter
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B series Valve lash adjustment

At this link http://dodgeram.org/tech/dsl/valve_adj/12_valve.html

Where it says "If no barring tool is available, the crankshaft may be turned with a 22 mm socket on the alternator pulley bolt. Rotate the engine clockwise when viewing from the front of the truck. This method turns the engine backwards, so make sure you are adjusting the correct valves."

The valve order on this website would then be backwards correct?

Instead of:
Adjust the clearance for these valves:

#1 - I & E
#2 - I
#3 - E
#4 - I
#5 - E
Then:
Adjust the clearance for these valves:

#2 - E
#3 - I
#4 - E
#5 - I
#6 - I & E


It would be:
Adjust the clearance for these valves:

#2 - E
#3 - I
#4 - E
#5 - I
#6 - I & E

Then:
Adjust the clearance for these valves:

#1 - I & E
#2 - I
#3 - E
#4 - I
#5 - E

Thanks for your help

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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post #2 of 15 (permalink) Old 04-09-2011, 01:28 AM
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Why would you turn the motor backwards. Pin the motor mark the dampener even with the fan belt. One set of valves will be on overlap If it is #1 then #6 is on tdc compression. and you set 124 intake & 135 exhaust, Be sure the pin is removed and set the rest,

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post #3 of 15 (permalink) Old 04-09-2011, 08:38 AM Thread Starter
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Just wondering with what it says about not having that barring tool. Does it matter if you turn it backwards?

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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post #4 of 15 (permalink) Old 04-11-2011, 12:05 AM
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For setting the valves, it doesn't matter what direction the motor is turned. Backlash in the geartrain won't matter here. Neither does the timing pin. Just watch the rocker arms to know where to stop at for 1 and 6 TDC. Pump timing is a different story.

You turn the engine backwards using the alternator nut because you can't keep tension on the belt and it slips on the pulley. And sometimes need to put a breaker bar in the tension to put more pressure on the belt so it won't slip.

A barring tool would be nice, but not absolutely needed for running the overhead. At least there is plenty of room to use one, and still turn it from the top side and watch things. No coolers in the way (at least on a 5spd truck).

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post #5 of 15 (permalink) Old 04-13-2011, 05:06 AM Thread Starter
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Right on. Thanks. Any idea where to find one of those nice barring tools?

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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post #6 of 15 (permalink) Old 04-22-2011, 05:10 AM
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also a little tip, set your intake to .008" and .015" exhaust, this will start the cam sooner in its lift and take a little longer in its close sequence and will allow faster spool and slightly cooler egt's. DO NOT GO BELOW THIS OR BAD THINGS CAN HAPPEN.
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post #7 of 15 (permalink) Old 04-23-2011, 05:33 AM Thread Starter
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Sounds good how about .009 and .016?

90' 1 Ton Dodge Diesel 4x4 Stock 12v. 5-speed Getrag. Custom 6'' Alcan Springs. 35'' Toyos.

2002 Dodge 2500 Cummins Automatic Stock.
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post #8 of 15 (permalink) Old 04-23-2011, 05:41 AM
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that works too

one truck at a time www.bigbaddieselperformance.com
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post #9 of 15 (permalink) Old 04-23-2011, 04:29 PM
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Seeing as most engines nowadays the set gets tighter, how about .010 and .020, that has worked for a lot of years.

1988 ford van fresh overhaul, 1991 nissan pick-up 1993 Caprice 2000 GMC S10 Blaser 2007 nbs 3500 GMC 4x4 crew-cab long box 17 inch single wheels Duramax Alison. BW turnover Ball. Furakawa FL35 loader. Retired, HD mechanic, worked on engines all my life. Fabricator welder. electrician. in the process of finishing my new shop. Live in Rock Creek B.C. Wife has a fruit stand.
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post #10 of 15 (permalink) Old 04-23-2011, 04:38 PM
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in a High HP rig .008" and .015" will improve performance in a stock truck then yes .010 and .020

one truck at a time www.bigbaddieselperformance.com
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