How many cylinder head temperature sensors (Sensor II) ??

[gintaras]

I'm putting my engine back together after many months out of commission due to a dropped valve.. I have one sensor, on the drivers side, but there is also a location on the passenger side head where a sensor would attach to as well. I can only find one sensor, how many am I supposed to have? Just the one? or is there one for each head?

Pic from ratwell..

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1979 Deluxe Westy in Mexico Beige

[telford dorr]

Only one sensor. Left and right head use the same casting, hence two holes.
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'71 panel, now with FI
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[sjbartnik]

There's only one cylinder head temp. sensor. This is called temp sensor II because temp. sensor I is the intake air temp. sensor inside the AFM.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650

[gintaras]

Thanks for the quick replies. I thought there was only one, but I was a little confused because there is even a cutout in the passenger side tin where the sensor would go if there was one.
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1979 Deluxe Westy in Mexico Beige

[vwwestyman]

Its a spare hole for if you accidentally strip the threads!
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Dave Cook

President, Wild Westerner Club

1978 Champagne Edition Westy, repowered to '97 Jetta TDI
1973 Wild Westerner
My Thing

[Wildthings]

You could have the tin for a '73 or '74 model year as the same location was used for the air injection system.

[PhotoDale]

I have no idea how to make a new thread, but I think this is a fitting place. Has anyone tried installing a Dakota Digital to a cylinder head without dropping the engine? I wouldn’t be opposed to dropping the engine, but my schedule is tight and I’m worries that I’ll take it apart and then not have time to reassemble the engine.

[my59]

[busdaddy]

Welcome, recycling old threads is encouraged here, well done! If you ever do want to start something there's an oval shaped "new topic" button at the top left of the forum page, but use it wisely, search first and add to one of your existing threads unless it's something completely new and different.

The problem when installing a sensor under a plug is preventing it from turning as the plug torques up, and the machined well the plug goes down into on the head doesn't leave much room between the side of the plug and the head for the sensor, removing the engine to add a notch in the head for the lead is the best way to do it.
Some have removed or lifted the cylinder tin enough with the engine installed, not an impossible job, but very challenging to get all the screws lined up and everything back into place while bent over and working in a tight space. Young bucks who don't know better can pull it off, older and wiser mechanics know it's better to just drop the engine, especially if they suffer for days after a contortionist performance like that.
Odds are good there's other things that need attention while the engine is out, fuel filler hoses and necks, vent lines and gauge senders usually need work on a vehicle of this age, and maybe it's time for a look at the clutch as well?, how about your shift bushings and CV joints?, it'll never get any easier.

You can likely get away with a one time sender install by just putting it on the plug and carefully torquing it, but the first time the plug is removed the sender may be damaged beyond repair, if you are prepared to eat the cost of a fresh one try it the easy way, but don't be shocked if things go sideways.
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