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Re: Check NTC sensor on left side of cylinder head Posted by Walt [Email] (#2707) [Profile/Gallery] (more from Walt) on Mon, 16 Apr 2012 20:37:58 In Reply to: Re: Check NTC sensor on left side of cylinder head, ACBC, Mon, 16 Apr 2012 07:23:23 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Nice photos. You have correctly located the green corroded NTC sensor in your first photo. Hex to right is a plug that is used on turbo models for returning hot coolant from turbo to thermostat housing for a trip through radiator. Thermostat is located just below center of first picture where big hose attaches to cylinder head. Thermostat is underneath an alloy cover that is attached to cylinder head by two bolts. NTC sensor swap is pretty simple. Think it requires a 19mm wrench. New sensor should come with a new copper seal and runs about $35 at NAPA. Removing the distributor, disconnecting its cam sensor wires, and pulling plug wires off plugs will provide more room to maneuver. It will also allow inspection to see if oil leak is from exterior distributor O-ring. Oil inside distributor cap is from oil seal inside distributor. I don't think this internal seal is DIY replaceable. External O-ring on distributor is a pretty simple DIY job. One has to ensure the flat key on end of distributor has engaged slot in camshaft by turning rotor until you feel it slide home. Oil could also be from cylinder head gasket. A search of this forum can provide detailed instructions for head bolt re-tightening. Disposable nitrile gloves will protect the hands from oil and scraped knuckles, and only run $10 at Harbor Freight. Coolant will escape while the NTC fan sensor is removed, so work fast and leave the radiator cap installed on the reservoir. A plastic garbage bag atop your automatic tranny will protect it and its expensive neutral safety/gear range switch from coolant. The job probably would be safer if the negative battery cable is removed from battery and the post covered to prevent unintended shorts by metal tools.
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