I am always amazed how uninformed folks are about their own vehicle when
it comes to maintaining it. Why pray/tell would the manufacturer put a
label detailing a required part, if it wasn't needed?? I suppose they
are just trying to make a profit on a less than $5 item, or maybe they
are only trying to fool the owner into spending that $5. Probably the
same can be said for all that oil the manual claims the engine needs
The reason this particular type engine NEEDS the sealant is because of
the two completely different metals that the block and heads are made
from. The Aluminum block and Iron heads have different
expansion/contraction rates. When both are at NOT, there isn't much of
a problem, it's when they begin to cool off when the problems arise.
If/when coolant begins seeping from its 'jacket', it's eventually gonna
end up in the oiling system. Coolant and oil don't mix at all. That's
the problem! Coolant in the oil system is not a lubricant for the
crankshaft/bearings/etc. of the engine. Once the innards of the engine
get a taste of coolant, they begin to wear at an astounding rate. That
is where the money pit is with an Aluminum block/Iron head engine. A
lousy $5 item prevents the problem, but for some crazy reason, folks
refuse to believe spending that $5 is a good investment.
This is a Cadillac group, so I would imagine everyone drives a Cadillac.
The guys that make the thing say you need to use the stuff, so use it!
Unless, of course, _you know more_ than they do.....Happy Motoring!