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Old 12-31-2011, 12:49 PM
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Default incorrect gauge reading

My cimbria has a vdo oil temp gauge stabbed in a port underneath the distributor its about a 100 degrees cooler than the sump. and yes I checked the gauge in boiling water it reads 212 at boiling.

Where is the best place to put the sender.
Thought about drilling and tapping the drain plug but I don't want the sender that close to the ground.

Is there a oil pressure relief valve closer to the motor that I can tap a port from. Or is there a better place.

vw 1600 that is
thanks dale
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Old 12-31-2011, 07:31 PM
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How did you figure that out, Dale? Flowing oil is going to be a little cooler than oil that's collecting in a sump that's holding heat. You can use one of the pressure ports underneath the engine (look caddy-corner on the engine for two holes with a big flat-blade screwdriver screw in 'em. That's the pressure relief valve(s)). There are senders built just to fit those two places. The other option is to drill and tap the end of one of the galleries on the engine by the crank pulley. Easy to do, especially when there is still oil in the case - the oil will flush the filings out when you break through.
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Old 01-01-2012, 10:51 AM
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by touch first and after my initial assumtion used a wireless temp gauge.
besides after running 20 minutes the gauge should read more than a hundred degrees
end of the dip stick was warmer than 100 degrees
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Old 01-01-2012, 04:39 PM
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Could be your sender is bad or the wrong sender. After 40 years the thermocoupler tends to get a little worn out . I'd try a different sender before looking for another location. If you still get the same readings, at least you'll be ahead a new piece of equipment!
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Old 01-01-2012, 05:07 PM
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i tested it in boiling water and it reads the correct temp
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Old 01-01-2012, 10:48 PM
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Ok, then the only other option why it might not be reading correctly is if there was some sort of sealant or thread compound on the unit when it was inserted in the block or if it was T-d into a pressure sender as well. If neither of those happened, then you know your options!
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Old 01-01-2012, 11:54 PM
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not sure what you mean by t-d
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Old 01-02-2012, 10:26 AM
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If you have a T fitting into that hole that feeds both the pressure and oil temp sender. Common ting to do and also a mistake.
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Old 01-02-2012, 12:46 PM
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makes sense now


taa eee duh
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