Re: clearance specs for intake and exh valves for

Posted by frankiee on August 23, 2005 at 09:32:46 from (69.198.194.170):

In Reply to: Re: clearance specs for intake and exh valves for posted by george md on August 22, 2005 at 22:52:54:

George
In reply to –

Frankiee,
If I ever catch anyone in my shop with a feeler
guage in a running engine , I will apply a size 9
squarely in the seat of learning and hoping it goes
all the way to the shoulders. I don't buy feelers
to have them ruined in a running engine.

George
My question asked for the spec. on the valve lash if anybody knew it off the top of their head. My manual on engines at my fathers says to do a running adjustment if possible.
If I could get a hot spec then it was possible because the engine was easy to put oil shielding around for the flying oil. It is a recommended procedure which I use when I can for the sake of accuracy. Yes I do some time shut down the engine when making an adjustment because it is getting messy even when using oil defectors on the rockers. In that case I sacrifice some accuracy.
I do not ruin my feeler gauges when doing this procedure and don’t know why I would if it is the recommended way of doing things.
I dug up some info I have here at hand at my place and have it below on the bottom of this post.

I am 41 years old. Been working on the farm and bush from a young age like many here. At 17 entered the “futures” program repairing small engines professionaly . At 21 worked in a BMW specialty shop rebuilding engines and adding turbochargers. Adjusted many mechanical valves both ways. Am now in 3rd year marine engineering and do running adjustments. I have read many books on the subject over the years and it is usually recommended that if possible to adjust with engine running although with engine shut off, is an acceptable shortcut if done fast.

I did get the answer to my question thanks to this site. And I thank the person who gave me the answer.

The answer was .017(Hot) for both intake and exhaust

I have since adjusted the lash with engine running for the best results and my feelers are in fine condition.

If at your house you would boot someone for doing it other then your way then thats your business.
At my house I treat others and other methods with respect. If I thought the method was not right I would question it and ask for proof of the method.

I guess I should thank you for the reply. It would be the respectfull thing to do being you took the time to type it out.
Thank you.

From “Auto Engines and Electrical Systems” Sixth Edition
Blanchard and Ritchen
Motor publishing 1973

Page 54 (Valve System Service)
“Normally, when the manufacturer specifies that valve adjustment should be carried out when the engine is hot, it is done with the engine running. However, with some engines this is not easy as splash oil all over the outside of the engine. So either a guard of some sort must be rigged to protect the mechanic, or the adjustment must be made with the engine stopped. On those engines where it is specified that the clearance should be measured when cold, the adjustment is always made with the engine stopped.”

Page 52 (Valve System Service)
Warm Valve Adjustment
….The actual temperature or the oil is not as important as stabilizing the oil temperature. The expansion of contraction of the valve mechanism, cylinder head and block are relative to this oil temperature. These parts stop expanding and valve clearance changes cease to take place only after the oil temperature is stabilized. Then the vales are adjusted with the engine running at normal idling speed.

Follow Ups:

• Re: clearance specs for intake and exh valves for george md 11:14:58 08/23/05 (0)
• Re: clearance specs for intake and exh valves for Allan in NE 10:19:56 08/23/05 (0)

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