Posted by jimg.allentown on March 24, 2020 at 07:55:40 from (24.115.193.250):
In Reply to: Head Gasket posted by super99 on March 23, 2020 at 15:17:06:
I have been working on engines for a lifetime. I have never used anything on a head gasket.
If the sealing surfaces are clean, flat, and dry, the gasket will seal. If not, no amount of goop will make a good and permanent seal. Maybe back in the 1930s, when the metal wasn't as good, the machined surfaces were not finished as smooth, some sealers might have helped. Low compression ratios found in older engines also put less stress on head gaskets.
Gasket design and technology has come a long way since the days when gasket sealers were commonly used.
I recall seeing some of the (then) old timers putting heads on with an impact wrench and never using a torque wrench. Them days are long gone.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
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