Re: [HSS] 27 Hudson F Head Valve Adjustment

Unknown

I am sure Geoff will have a more lucid reply but
here is my advice.

 

Think of your firing order, 1,5,3,6,2,4.  A
six cylinder engine is designed so that two pistons move in pairs.  When
one is up at the top of its exhaust stroke, it's "partner" is at the top of the
compression stroke.  Cylinders are paired 1-6, 5-2 and 3-4.  When
a cylinder is at the top of the exhaust stroke, the exhaust valve will be just
closing and the intake valve will be just opening.  At this point the
"partner cylinder will be at the top of it's compression stroke and both intake
and exhaust tappets can be set at the same time.

 

So:  If you use the crank and slowly turn the
engine until the timing marks on the flywheel show DTC 1-6, and you are
observing whether either the 1 or 6 exhaust valve is just closing or has just
closed, then you can set the "partner cylinder's valves.  Once
you have done this, it is only 1/3 of a turn until the next cylinder is
ready, following the firing order.

 

Hudson supplied special tappet wrenches (9/16) with
a special offset because it is next to impossible to get a proper grip on the
locknuts is some spots, particularly in cylinders 3 and 4.  If you get an
inexpensive open end 9/16 and get somone to heat up the shank near the open end
and bend it about 20 degrees this will be close to the factory wrench and make
your task much easier.

 

Certainly, your tripling of the hot settings is
safe.  I have found that 50% over for a cold engine gets you very close to
the correct hot setting.

Good luck

Karl

----- Original Message -----

From:
okgat

To: HudsonSuperSix16-29@yahoogroups.com

Sent: Wednesday, April 04, 2007 9:16
PM

Subject: [HSS] 27 Hudson F Head Valve
Adjustment

The novice is back. Help please. I recently had our intake and
exhaust
valves and seats ground. I have adjusted the exhaust valves
using the
following method:

Exhaust Valve adjustment
1) Bring intake valve rod
to top by turning over crank.
2) Adjust exhaust valve clearance to
.014
Note: This adjustment is a cold adjustment and I was told that once

the engine is fired up I would then reset the adjustment between
.06-
.08.

I recently read a page from "Everyman's Guide to Motor
Efficency",
which was published in 1927. In part it states the following:
"Adjust
the lifters while the engine is hot, if possible. It this cannot

convenienetly be done for any reason, leave two or three times the

normal space in the adjusting the cold engine, and then test the

adjustment when the engine is good and hot."

Comments
please.

Intake Valve Adjustment

I currently have the head off.
What would be the recommended method of
adjusting the intake valves. As an
example, would I watch the exjaust
valve raise from the seat fully and
then make the adjustment or?

Thank you.