I have a 93 Caravan 3.0 Leter engine, I have noticed its leaking antifreeze
from the left side (drivers side) of the engine onto the transmission
housing then down onto the floor. There is a 1.5 inch return pipe coming
out of the engine going into the rad, and I pulled that out and did not see
any cracks to the seal ring. I have not pulled out the longer pipe that it
fits into becuase its very hard to pull out and i dont want to risk breaking
anything. I have also noticed some fibreglass or pink insulation inside the
engine after i pulled out the return pipe.
Is there a way of fixing the leaking antifreeze problem without pulling out
any more pipes? Has anyone come accross this problem of leaking antifreeze
out of the engine and onto the transmission?
First of all you don't even know that it is the pipe!! it could be a cracked
head gasket or even a water pump leaking and draining thru the valley under
the intake. I would never try to half ass fix a coolant leak.
on 3.0L enginees, the water pump sucks water from rear of the engine
(transmision side.) through a solid metal tube. One end of the tube is
connected to the water pump and sealed with and o ring, no bolts. The
other end is connected to the radiator hose. There is a metal braket
stablizing that metal tube. the braket is connected to the transion/
engine bolts. If you take that braket, you can pull it out without
problem, which i 'm stricly againts. If you donot have a crack on the
metal tube, the only place that the water can leak on that tube is on
the side where water pump connects it. You need to open the front
side, and take the water pump and housing out to see it. You might
want to clean the fitting parts to get rid of any residdue.
The hose sits under heads however it is surrounded by heads, intake
and engine. depending on where it leaks, it will flow on the engie to
the other side. I donot know if there is any opening between engine
block and waterpump housing to let thecolant flow under the pump to
theground. you need to open the timing belt side of that engine.
If the water pump or head gasket develops a leak it will normally leak down
the belt side of the engine unless the drain passage gets stopped up it will
drain to the other side making it hard to diagnosis
I'm talking about where the bypass pipe connects to the water pump not
regular water pump failure. When the water pump fails, it will leak
though a hole just belove the pulley. I want to point out the o ring
around the mentioned pipe connecting the water pump just below the
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