This is a very common problem with the 5.7l (350) Vortecs. Chevy
screwed up and overtorqued the inlet manifold bolts and the gasket
crushes and starts leaking. The cure is to replace the inlet manifold
gasket.
Check out this forum for Suburban information equal to what this
board has for the old trucks:
http://forums.vmag.com/suvsuburban0103/
Bruce K
57 3200
96 K1500 Burb
Mt. Iron, MN
At Saturday, 8 March 2003, you wrote:
>I am having a problem with my 1998 Chev Suburban 2WD, with a 350
Vortec. It
>is leaving a small puddle (maybe a tablespoon each time it is parked)
of
>antifreeze on the garage floor. The antifreeze is coming from the
passenger
>side of the engine and is dripping from the skid plate on the cross
member
>and the right side of the pan, right back to the bell housing shows
signs of
>antifreeze dripping.
>
>I have crawled underneath and I believe confirmed the following things;
>
>-antifreeze is not coming for a loose hose, as all hoses do not
have any
>sign of antifreeze residue. In my climate of cold temperatures,
-30 to -45,
>hoses will sometimes shrink and a small amount of antifreeze will
leak out.
>-block heater is not leaking
>-frost plug behind the starter is not leaking. Yes, I took the starter
off
>and looked.
>-driver side drain plug is not leaking
>
>The antifreeze is showing up on the passenger side of the block.
That is why
>I took the starter off to check the frost plug.
>
>My two suspect areas are;
>
>- on the passenger side of the engine, where the drain plug would
be located
>is a sensor. A friend who is an automotive mechanic told me this is an
>anti-knock sensor. Has anyone ever had this sensor out? If so is
it a pipe
>thread like a drain plug or is there an o-ring in there somewhere?
>
>I would ask my friend but he left town last Wednesday for his two
week tour
>at a diamond mine.
>
>I have tried to clean off around this sensor this afternoon, and then I
>backed it out of the garage and warmed up the truck. It is now back
up on
>blocks and after 15 minutes I had no signs of antifreeze leaking
anywhere.
>
>- the water pump, as the truck has 110,000 miles. But I can't really
see up
>in to the water pump with all the other stuff on the engine. Either
that or
>I have no idea what a water pump looks like! If the water pump were the
>problem wouldn't there be antifreeze dripping from the front of
the engine?
>
>Any experience or ideas are appreciated.
>
>Oh did I mention that my nearest Chev or GMC dealership is 375 miles
away!
>There is a local garage that will fix it, but I would really like
to fix
>this one myself.
>
>Blaine Dumkee
>Fort Smith NT
>Canada
>oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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