Fixing a crankshaft position sensor leak...

[Wayne]

Fixed a crankshaft position sensor leak...

I've had a crankshaft position sensor (CPS) leak ever since I bought my truck (for approximately 10K now) and have asked for a known fix on this forum, and got a few responses. All were grim, and everyone had to eventually replace the sensor. Christo Slee tried a number of sealants, but had no luck..... well, I tried Permatex's Hylomar HPF gasket and flange sealant and it has stopped the leak..... at least for the last two weeks anyway. I cleaned the sensor and housing good with brake clearer before appling a light coat of sealant. The rubber gasket (o-ring) that goes between the sensor and housing has a flang molded on the inside radius....... its not your usual o-ring....... and I was told that a 2000 Ford Explorer oil pan plug gasket is very close to the same size, shape, etc. as the OEM gasket (which you can't buy from a Toyota dealer, forcing you to replace the entire sensor (approx $75-100). I have not checked out this alternate gasket myself, but I will if the leak starts again.

Wayne S

 

[Wayne]

Hey Wayne, that is great information......... thanks, that could save me $75-100 some day.

Wayne

 

[RavenTai]

was the leak from a bad sensor housing or bad o-ring?

 

[Wayne]

It was from the o-ring....... the PO must have thought it was leaking from the sensor, where the wiring goes into the sensor, because there was sealant on the wires and sensor at that location.

Wayne S