|
|
Joined: Mar 2008
Posts: 911
ChatMaster - 750
|
OP
ChatMaster - 750
Joined: Mar 2008
Posts: 911 |
Awhile back we talked about setting valves. You can set all the valves with just a couple of turns on the crank. Can you run that by me again on witch cylinders to check at the same time? Thanks
|
|
|
|
|
Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
|
|
Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
|
|
|
|
|
Joined: Mar 2008
Posts: 911
ChatMaster - 750
|
|
OP
ChatMaster - 750
Joined: Mar 2008
Posts: 911 |
I looked up valve settings on the search and did not see that. What should have looked up? And thanks a lot for your quick answer Roger
|
|
|
|
|
Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
|
|
Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
|
|
|
|
|
Joined: May 2012
Posts: 4,374 Likes: 30
ChatMaster - 4,000
|
ChatMaster - 4,000
Joined: May 2012
Posts: 4,374 Likes: 30 |
Question about Setting Valves...
In my 1929 Chevrolet Repair Manual it states .008" gap for BOTH Intake and Exhaust Valves.
In my 1929 Inst for Oper and Care it states .006" gap on Intake, .008" gap for Exhaust.
With this difference, what SHOULD be Used. I set mine via the 1929 Inst for Oper and Care with .006" gap on Intake, .008" gap for Exhaust.
I did STOP engine and do warm adjustments at that time, I tried to do it while idling, but guess it takes some practice and skill not to damage your feeler gauges and adjust.
AACA - VCCA - Stovebolt - ChevyTalk
Love the Antique Chevrolet's from 1928-1932
The Beauty, Simplicity, History, and the Stories they Tell
|
|
|
|
|
Joined: Dec 2001
Posts: 1,919
ChatMaster - 1,500
|
|
ChatMaster - 1,500
Joined: Dec 2001
Posts: 1,919 |
I've always done '29's the same as 31's or 32's. .006" intake and .008 exhaust.
The trick is to slow the engine idle down and you can adjusts the valves really easy. With it at a really high idle it's hard.
|
|
|
|
|
Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
|
|
Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
|
|
|
|
|
Joined: Apr 2002
Posts: 3,008 Likes: 1
ChatMaster - 3,000
|
|
ChatMaster - 3,000
Joined: Apr 2002
Posts: 3,008 Likes: 1 |
I have always set our '31 valves at .008 and .010 after I burnt a valve about 40 years ago. Haven't had any problems and don't know if it hurts ao helps anything.
See you Touring the Back Roads
Joined VCCA June 1, 1961
|
|
|
|
|
Joined: Nov 2002
Posts: 7,472 Likes: 26
ChatMaster - 7,000
|
|
ChatMaster - 7,000
Joined: Nov 2002
Posts: 7,472 Likes: 26 |
Do you set them hot or cold? The only thing I think it would do is perhaps be to have a little more clatter.
Steve D
|
|
|
|
|
Joined: Feb 2014
Posts: 108
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Feb 2014
Posts: 108 |
So ......Who amongst you sets their valves using a vacuum gauge?
Why or why not?
Dale
|
|
|
|
|
Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
|
|
Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
|
|
|
|
|
Joined: Oct 2007
Posts: 558
Oil Can Mechanic
|
|
Oil Can Mechanic
Joined: Oct 2007
Posts: 558 |
I set mine hot and 0.008 across intake and exhaust. Small amount of clatter but not much...About like a treadle sewing machine.
Mac
|
|
|
|
|
Joined: Feb 2014
Posts: 108
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Feb 2014
Posts: 108 |
When setting using vacuum, I assume, the valve is tightened until the reading fluctuates, then backed off just until the needle stops fluctuating, then locked down? If engine is up to operating temp, and the vacuum is not fluctuating at idle, and there is no clatter, is it safe to assume that valves are good to go? Dale
|
|
|
|
|
Joined: Apr 2010
Posts: 734 Likes: 14
Oil Can Mechanic
|
|
Oil Can Mechanic
Joined: Apr 2010
Posts: 734 Likes: 14 |
Hello akdale,
I would be afraid to set solid lifter valves so close to the fine line between perfect and damaging. I would use the clatter, ( ticking noise) as an indication of being on the safe side when setting the valve lash.
|
|
|
|
|
Joined: Apr 2009
Posts: 124
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Apr 2009
Posts: 124 |
I have tried to keep my '31 Phaeton valves at .006 and .008 on and off for about 30 years now, but they are quite noisy. Had new valves, springs, guides installed and guides reamed as stated in the manual still valves appear too noisy in my opinion. Also has a new rocker arm shaft, new rocker bushings, new adjusters, and rocker arm ends reground. Engine has almost 5,000 miles on it after the rebuild and runs well. The pushrods 'appear' to be straight as well. Placing a feeler gauge between valves and rocker arms will quiet each valve, but again with correct gap they seem too noisy. Oil is flowing as it should. Engine seems 'stiff' could the guides be too tight causing the valves to 'stick' maybe? (once on a trip going downhill, the #6 exthaust valve stuck open, but a light tap with a hammer and oil from the dipstick took care of that and it has never happened again.) My '31 Spcl sedan does not have this 'problem', it has a good used head with original valves and guides that I found at a swap meet years ago and installed as I found it. VCCA 18184
|
|
|
|
|
Joined: Dec 2001
Posts: 1,919
ChatMaster - 1,500
|
|
ChatMaster - 1,500
Joined: Dec 2001
Posts: 1,919 |
I do mine hot and while engine is running, and using a vacuum gauge.
When using the gauge, you still use a filler gauge to set the valves. I also used the next size filler to check my adjustment. So if a .007 goes in on when I set it to .006, I'm not right. Also you will see this on the vacuum gauge when this valve opens.
Last edited by 32confederate; 10/23/14 03:04 PM.
|
|
|
|
|
Joined: May 2012
Posts: 4,374 Likes: 30
ChatMaster - 4,000
|
|
ChatMaster - 4,000
Joined: May 2012
Posts: 4,374 Likes: 30 |
I am interested in How you do this with a Vacuum gauge, mainly WHERE do you Connect the Vacuum Gauge ??
I have used the vacuum gauge to adjust the idle/ throttle, connecting the vacuum gauge to the intake manifold connection where the wiper connects.
AACA - VCCA - Stovebolt - ChevyTalk
Love the Antique Chevrolet's from 1928-1932
The Beauty, Simplicity, History, and the Stories they Tell
|
|
|
|
|
Joined: Feb 2014
Posts: 108
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Feb 2014
Posts: 108 |
I hook up to where the wiper gets its vacuum from on the intake.
|
|
|
|
|
Joined: Feb 2014
Posts: 108
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Feb 2014
Posts: 108 |
Thanks for the response. Been thinking about this procedure tho. If a person is accurate with the feelers, then the vacuum gauge is just used to check the job. Does anyone here use only the vacuum gauge for setting lash? Thanks, Dale I do mine hot and while engine is running, and using a vacuum gauge.
When using the gauge, you still use a filler gauge to set the valves. I also used the next size filler to check my adjustment. So if a .007 goes in on when I set it to .006, I'm not right. Also you will see this on the vacuum gauge when this valve opens.
|
|
|
|
|
Joined: Feb 2014
Posts: 108
Shade Tree Mechanic
|
|
Shade Tree Mechanic
Joined: Feb 2014
Posts: 108 |
|
|
|
|
|
Joined: Mar 2008
Posts: 911
ChatMaster - 750
|
|
OP
ChatMaster - 750
Joined: Mar 2008
Posts: 911 |
Feeler gauge for me. When the valves stuck on my new rebuilt head I had them check all the guides and found that they were at .002 not .003 or more, redid and much better Roger
|
|
|
|
|
