300 inline 6 valve lash adjustment
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New User
Joined: Feb 2020
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300 inline 6 valve lash adjustment
Good Morning. I'm looking for the correct adjustment order for adjusting the valve lash on my 300 strait 6. I have found and made my A, B and C makes on my harmonic balancer. I know I start with number 1 hole at TDC but looking for all the rest of the order at their correct A,B & C. Any help is greatly appreciated.
Thank you in advance.
Thank you in advance.
Cargo Master
Joined: Jan 2019
Posts: 3,369
Likes: 16
From: Caraway, AR
I can't break it down for you by a b c, but this post should make it clear enough. https://www.ford-trucks.com/forums/1...l#post17161625 There is a more detailed on explaining how you are doing it, but I think it's at fordsix, if I find it I'll link it here. *edit* It was the same one over there, just with the note to mark the dampener 120* apart. So that's that quick and easy write up.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Welcome to FTE
There's a few different approaches to this, the important thing is whatever method used that the valve being adjusted, the lifter is on the base circle or heel of the cam lobe.
Some people find it less complicated to simply bring the #1 cylinder to TDC on the compression stroke. Both #1 valves can be adjusted at this time. Roll the engine over to the next cylinder in firing order and adjust both those valves. Rinse lather repeat.
EO/IC rule (Exhaust Opening and Intake Closing). Set any intake valve lash when its companion exhaust valve is beginning to open. This puts the intake lifter at the base circle. Then set the exhaust valve lash when its companion intake valve is about halfway down on the closing side.
There's a few different approaches to this, the important thing is whatever method used that the valve being adjusted, the lifter is on the base circle or heel of the cam lobe.
Some people find it less complicated to simply bring the #1 cylinder to TDC on the compression stroke. Both #1 valves can be adjusted at this time. Roll the engine over to the next cylinder in firing order and adjust both those valves. Rinse lather repeat.
EO/IC rule (Exhaust Opening and Intake Closing). Set any intake valve lash when its companion exhaust valve is beginning to open. This puts the intake lifter at the base circle. Then set the exhaust valve lash when its companion intake valve is about halfway down on the closing side.
Elder User
Joined: Apr 2012
Posts: 544
Likes: 6
From: Kalispell, MT
TDC on the compression stroke, you can adjust:
#1 Intake
#1 Exhaust
#2 Intake
#3 Exhaust
#4 Intake
#4 Exhaust
#5 Exhaust
Then, at TDC on the exhaust stroke:
#2 Exhaust
#3 Intake
#3 Exhaust
#4 Exhaust
#5 Intake
#6 Intake
#6 Exhaust
This nugget of knowledge was shared with me by AbandonedBronco recently. It does work quite well. Went thru and double checked lash with engine running sans valve cover. Hope this helps anyone that happens upon this thread.
#1 Intake
#1 Exhaust
#2 Intake
#3 Exhaust
#4 Intake
#4 Exhaust
#5 Exhaust
Then, at TDC on the exhaust stroke:
#2 Exhaust
#3 Intake
#3 Exhaust
#4 Exhaust
#5 Intake
#6 Intake
#6 Exhaust
This nugget of knowledge was shared with me by AbandonedBronco recently. It does work quite well. Went thru and double checked lash with engine running sans valve cover. Hope this helps anyone that happens upon this thread.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Trending Topics
More Turbo
Joined: Nov 2015
Posts: 715
Likes: 112
What year engine is this?
The 1985 and later 300s do not have adjustable rockers.
Some of the 1978 and later engines have a shoulder stop on the rocker studs.
The 1985 and later 300s do not have adjustable rockers.
Some of the 1978 and later engines have a shoulder stop on the rocker studs.
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