Question about Isuzu Cars & Trucks
The water pump has been replaced, then the head was welded, head gasket replaced, when turned off, a hissing noise lasts for 10 seconds emits from front passenger side under bonnet, truck has no pick up most of the time
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Posted on Jan 02, 2017
watch for leaks and follow them after you drive i would geuss checking your thermostate housing both parts, the hoses that go to the heater core by the throttle body and the hose that goes to the throttle body, im guessing this is the turbo, if it is a non turbo it would be a hoses the waterpump or the oring that goes into the waterpipe on the front of the block, just get in there and take a good luck and remember the rules of gravity =) good luck man and if you need any parts for it let me know we got alot of these parts cars out in our yard
Posted on Sep 11, 2008
The condensation drain is plugged in the heater/AC plenum, the drain is under the hood at the very bottom of the firewall on the passenger side.
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Posted on Dec 02, 2008
It is either condensation water from the A/C unit that should go out a drain tube to the outside (only if A/C or Defrost is on) or a leaky heater core. If it is a heater core you can usually smell a coolant smell and the water will be warm and your windows will fog up inside. Heater core is more common. Joe ASE Master Tech
Posted on Mar 05, 2009
The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.
Posted on Jul 15, 2009
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