Valve Adjustment.... Will This Work ?
Thread Starter
Melting Slicks
Joined: Feb 1999
Posts: 2,473
Likes: 10
From: New Paltz, New York USA
Valve Adjustment.... Will This Work ?
I have all the rocker arms off and the rods out of my 81, I just replaced the seals. I put a rod back into the lifter and let it just stick out, now I turned the engine over with the crank nut and watched the rod come all the way up and then go down. After it stopped going down I turned it just a touch more to make sure it was all the way down. Now I put the rocker arm back on and adjusted the valve by turning it inbetween my fingers and tightening the nut till I felt a difference, then turned the nut 3/4 of a turn more. I know this is the long way to do this but I really feel comfortable doing it this way, if it will work.
Thanks for any help.
Thanks for any help.
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Re: Valve Adjustment.... Will This Work ? (Richard Cooper)
this will work but you can do it in 2 steps. TDC#1 ex 1-3-4-8 int 1-2-5-7 TDC#6 ex 2-5-6-7 int 3-4-6-8 do not install the TDC#6 pushrods till you finish the TDC#1 first. :chevy
Team Owner
Joined: Aug 1999
Posts: 42,487
Likes: 47
SPARTAN
CI 3-4-5-6-8-9-10 Vet
CI-9 AutoX Winner
CI-3 Go Kart Champ
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11
Re: Valve Adjustment.... Will This Work ? (clem zahrobsky)
Yup. What clem said. Rather than remember that order, what i typically do is start with the engine at TDC #1. Adjust #1 & rotate the engine 90 degrees. Then do #8, another 90, then #4, etc....3,6,5,7,2....
Takes a little time, but 1-8-4-3-6-5-7-2 is burned into my brain much better than 1-3-4-8, 1-2-5-7 / 2-5-6-7, 3-4-6-8.
What you're doing will work, but it seems a bit lengthy.
Dave
Takes a little time, but 1-8-4-3-6-5-7-2 is burned into my brain much better than 1-3-4-8, 1-2-5-7 / 2-5-6-7, 3-4-6-8.
What you're doing will work, but it seems a bit lengthy.
Dave
Melting Slicks
Joined: Mar 2000
Posts: 3,206
Likes: 0
From: WANTED: '68 rear valance with b/u light assemblies IM, e-mail, or PM me here. Thanks!
Re: Valve Adjustment.... Will This Work ? (Richard Cooper)
If that works for you then why not place all the push rods in position and mount the rockers for all the push rods that are down at a give point? This would save you time and would cut down on the number of times the motor is turned dry by the crank bolt… which isn’t recommended.
Melting Slicks
Joined: Dec 2000
Posts: 3,407
Likes: 2
From: Carmichael CA
Re: Valve Adjustment.... Will This Work ? (63Banshee)
Like 63Banshee said...many mechnics assemble the entire valve train, then tighten down the valves while spinning the push rods until there is resistance in the push rods.
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
Re: Valve Adjustment.... Will This Work ? (ddecart)
72184365 is the firing order....
so that has allmost nothing to do with adjusting valves...
but I find the heel of most cams is nearly perfect in grind so for most degrees of rotation there is so small a variation it just not important enough a variation...so I manage to flip crank just 180 deg. once is enough to get them all....I"m lazy I know....but they run fine...I do 1/2 turn after friction felt on push rod....
not for solid lifters, it's more ciritical....
GENE
so that has allmost nothing to do with adjusting valves...
but I find the heel of most cams is nearly perfect in grind so for most degrees of rotation there is so small a variation it just not important enough a variation...so I manage to flip crank just 180 deg. once is enough to get them all....I"m lazy I know....but they run fine...I do 1/2 turn after friction felt on push rod....
not for solid lifters, it's more ciritical....
GENE
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Re: Valve Adjustment.... Will This Work ? (63Banshee)
that what my way does you do all the lifters that are down,8 on TDC#1, and 8 on TDC#6. if you put all the pushrods in and turn the engine you came collaps some lifters and they will not come back so when you adjust them they will be too tight :chevy
Burning Brakes
Joined: Dec 2000
Posts: 795
Likes: 0
From: Madison MS
Re: Valve Adjustment.... Will This Work ? (mrvette)
72184365 is the firing order....
so that has allmost nothing to do with adjusting valves...
so that has allmost nothing to do with adjusting valves...
dl
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Drifting
Joined: Jul 2001
Posts: 1,418
Likes: 1
Re: Valve Adjustment.... Will This Work ? (mrvette)
MrVette,
18436572 is the Chevy firing order.
Quote:
" would cut down on the number of times the motor is turned dry by the crank bolt… which isn’t recommended."
It is only twice around with a presumably well assembly lubed"not motor oil" assembly excepting the cylinder walls and not under any type of a load as compared to cranking or actual running.Every motor I have ever built has been rotated this way.Also gives you a chance to see if you were on TDC #6 or TDC#1 when you started by checking the previous set rockers for the obvious ultra loose ones.The small Chevy is not as easy to see the cam lobes as a BB is when the cam is installed.
Clems way can be done as well .
_______
18436572 is the Chevy firing order.
Quote:
" would cut down on the number of times the motor is turned dry by the crank bolt… which isn’t recommended."
It is only twice around with a presumably well assembly lubed"not motor oil" assembly excepting the cylinder walls and not under any type of a load as compared to cranking or actual running.Every motor I have ever built has been rotated this way.Also gives you a chance to see if you were on TDC #6 or TDC#1 when you started by checking the previous set rockers for the obvious ultra loose ones.The small Chevy is not as easy to see the cam lobes as a BB is when the cam is installed.
Clems way can be done as well .
_______
Race Director
Joined: Apr 2000
Posts: 17,654
Likes: 190
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Re: Valve Adjustment.... Will This Work ? (mountainmotor)
This was the way I was told to do it. For a perforamnce cam it is important to be on the heel of the cam. FIrst loosely install all rockers. To find the heel for number 1 cylinder you look at cylinder 6. THe point where exhaust is closing and the intake begins to open is overlap and that is when you want to adjust the valves on number 1. Then go to number 8 and look at cylinder 5 and so on in this pattern:
1 8 4 3
6 5 7 2
Any comment on this is fine as I have not yet tried it but will be doing it soon :D
1 8 4 3
6 5 7 2
Any comment on this is fine as I have not yet tried it but will be doing it soon :D
Safety Car
Joined: Feb 1999
Posts: 3,631
Likes: 14
From: Fountain Hills AZ
Re: Valve Adjustment.... Will This Work ? (dladd74roadster)
72184365 is the firing order....
so that has allmost nothing to do with adjusting valves...
The firing order does have something to do with it. If you start off with #1 at TDC, you can adjust the intake and exhaust valves for that cylinder. When you turn the crank 90 degrees that brings 8 up to TDC and you can adjust them. In order to do it this way, you have to know the firing order and you have to KNOW that the valves aren't going to be open when that cylinder fires so BOTH the intake and the exhaust lifters are going to be on the base circle of the cam.
dl
so that has allmost nothing to do with adjusting valves...
The firing order does have something to do with it. If you start off with #1 at TDC, you can adjust the intake and exhaust valves for that cylinder. When you turn the crank 90 degrees that brings 8 up to TDC and you can adjust them. In order to do it this way, you have to know the firing order and you have to KNOW that the valves aren't going to be open when that cylinder fires so BOTH the intake and the exhaust lifters are going to be on the base circle of the cam.
dl
Team Owner
Joined: Aug 2000
Posts: 21,422
Likes: 453
From: Massillon,Ohio USA
2020 C3 of the Year Finalist - Unmodified
Cruise-In VI Veteran
St. Jude Donor '08-'09-'10-'11-'12
Re: Valve Adjustment.... Will This Work ? (MotorHead)
This was the way I was told to do it. For a perforamnce cam it is important to be on the heel of the cam. FIrst loosely install all rockers. To find the heel for number 1 cylinder you look at cylinder 6. THe point where exhaust is closing and the intake begins to open is overlap and that is when you want to adjust the valves on number 1. Then go to number 8 and look at cylinder 5 and so on in this pattern:
1 8 4 3
6 5 7 2
Any comment on this is fine as I have not yet tried it but will be doing it soon :D
1 8 4 3
6 5 7 2
Any comment on this is fine as I have not yet tried it but will be doing it soon :D
