Small Block Chevy Valve Stem Seal Replacement
Engines that have higher mileage or are older than 10 years commonly emit a puff of smoke from the tail pipe after initial start-up due to failing valve seals. This webpage will explain how to replace the original valve stem seals with new replacements.
A few tips before starting:
Use clamp type spring compressor
rather than a 'pry-bar' type compressor; Have a magnetic pick up tool ready,
Have a small flashlight handy, Be sure to fully seat umbrella (exhaust) and
positive (intake) seal fully-press evenly on both sides using boxed wrench
for example, & Be sure nothing falls in the engine !
Some steps are omitted because they are not needed or required to complete this repair. Examples of this are "Remove the serpentine belt to make rotating the engine easier", "Cleaning the motor as well as possible so debris doesn't fall inside, or; "Inspect all parts & hardware for damage before installing" Some measure of common sense is expected !!
** I don't
advise using air pressure to keep the valves in place when changing the
Valve Stem Seals. If someone steps on the air hose, the air line breaks, the
Compressor loses power or the valves are not in the "best" position, then
the air pressure could be lost and the valve could fall into the cylinder.
Stuffing or filling the the cylinder will insure that the valve stays up -
at all times - until the stuffing is removed. The best type of 'stuffing'
I've found is simply and old spark plug wire...... It's strong enough to
push & pull thru the spark plug holes repeatedly without disintegrating and
can not damage the engine internals in any way.
How To Remove / Install Valve Stem Seals on a Small Block Chevy V8 Engine
until all seals are replaced ( thru the 1-8-4-3-6-5-7-2 firing order)