Found a small coolant leak presumedly from a leaking intake manifold gasket.
98 Montana w/approx 93K miles. GM released a 'new design' gasket with
'improved sealing qualities'. Felpro lists an intake manifold gasket set
for the 3.4l engine. Anyone have exprience with Felpro gaskets for this
engine.? I've successfully used Felpro gaskets in other applications but
since the 3.4 engine is prone to intake leaks, I'd like to not have to do
the job again.
Did you get a response to this query?
I have the same leak on my 2000 Montana. I found a GM service bulletin
03-06-01-010 dated March 2003 which calls out a 'new' gasket with better
sealing properties and the torque specs for the intake manifold. The
new GM part number is 89017279.
Did you do your gaskets yet, and how difficult was it?
Jason didn't get any replies and ended up buying the Felpro set. To get to
the lower manifold, a bunch of parts have to come off. I had access to a GM
service manual, marked everything and took my time. The push rods have to
come out to get the gaskets out. A special tool was needed to disconnect
the fuel lines and you'll need torques wrenches. The service manual said
the engine had to be dropped down to get the alternator out so I changed it
too. With the upper manifold off it came out without lowering the engine.
I used the new torq specs with the Felpro gasket however don't know if it is
the same gasket as the new p/n.
I'd say if you plan on doing it yourself, definitely get a service manual.
Physically they looked like the ones I removed. The gasket appears to be
"plastic" about 1/8" thick with "rubber" inserts around the sealing areas.
I could see where the OE gasket sealing area had deformed and allowed some
seepage. Not bad yet and hadn't gotten into the crankcase. I like the
utility of the van and want to keep it. In the past Fel-pro has been the
'preferred' replacement gasket in some problem applications. Expensive
enough! Nearly $50 for just the upper & lower set & a tube of RTV plus I
had to buy valve cover gaskets as a separate item.
I replaced them in my 01 montana with the latest version from GM.
The new ones were quite different from the ones I removed and
appeared to me to be much improved. I hope GM finally got it right
as their latest is their third version.
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