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1997 T100 Xtra cab
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44 Posts
Discussion Starter #1
My '97 T100 with the 3.4 5VZ-fe appears to have a small coolant leak near the top of the thermostat. I suspect this is a leaking water pump, but I'm not sure why the leak would show up that high - it ought to be coming out around the bottom of the timing belt cover, or maybe showing up around the bottom of the thermostat, right?
 

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1998 T100 SR5 2WD
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14,675 Posts
A piccie of the leak would really help here...really. ;)

It could be from the bypass tube gasket (provides water to the heater core) or the hose itself. If it's from the top radiator neck...it's just the gasket. If it's from the lower neck where the thermostat is, it could be the water pump itself or the water pump gasket.

Pull the timing cover off and do a visual inspection. ;)
 

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1998 T100 SR5 2WD
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14,675 Posts

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Registered
1997 T100 Xtra cab
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44 Posts
Discussion Starter #4
Similar, yeah, but my T100 has 337,000 miles. :D And I know where the thermostat is. I'm just wondering where the weep hole in the water pump would be likely to make its presence known. Slow leaks can be tricky.
 

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1998 T100 SR5 2WD
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14,675 Posts
The weep hole is at the bottom of the water pump shaft bearing. If it leaks...it's going down...straight...to the timing belt. :(
 
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