Where is the thermostat located on a 1991 Acura Legend with a 6 cylinder engine
Should be on the right side, where the lower radiator hose attaches to the engine. To get to this area you have to remove the air-filter box. Locate the elbow to which the lower hose attaches; it is attached with two hex bolts. Drain the coolant, then disconnect the lower hose from the elbow and take out both bolts, and the thermostat is revealed in its 'well'. You may have to use some force to get the old unit out. Pay careful note to how the thermostat is oriented -- there are two little 'ears' that line it up.
Be sure to buy a new gasket for the thermostat when you purchase the thermostat (yes, they should sell them together, but often they don't!) and install to match the one you removed. I advise cleaning out the 'well', the seating face against which the thermostat's valve acts, and the mating face of the elbow casting you removed. I also think it a good idea to blow things out with a good brake or carburetor cleaner, then wipe and let dry. Seat the thermostat carefully in the well - it goes in with the spring facing into the engine, but it really only fits one way - being sure the 'ears' are lined up and the gasket seats all the way into the 'well' with no particles or crud behind it. When reattaching the elbow, be careful not to pinch the gasket. I used a little form-a-gasket around the edge of the joint just to be sure I won't see a leak if the gasket doesn't seat quite right.
The thermostat is just under the throttle assembly at the front of the engine. You will need to remove a black plastic shield in order to access it. Is it difficult to remove and replace? Should that job cost $100? Would a failing thermostat cause the radiator to crack,leak and overheat on my 1991 Acura?
The thermostat is located at the back of the engine near where the radiator hoses attach. There is a housing held in by two bolts. It may be necessary to remove the air cleaner housing to access it. The new thermostat from Honda comes with the gasket and can only be installed one way (with the pin up).
To replace the thermostat in a 1994 Acura Legend you will first need to follow the vehicleÕs radiator hose to the area where it connects to the engine. The area of connection is known as the thermostat housing. Squeeze the two tabs on the radiator hose clamp using a pair of pliers and pull the hose off of the thermostat housing. Remove the bolts which hold the lid to the thermostat housing so the housing can be removed. Remove the thermostat and its gasket from the housing. Clean the mating surfaces of the thermostat housing and lid. Place the new thermostat in the housing and attach the gasket making sure that the spring end of the thermostat sits in the housing and the pin is facing out. Put the lid in place and secure it with the proper bolts. Replace the radiator hose on the thermostat housing and reclamp it.
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