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2009 451 Rally Red, Pennzoil Platinum Euro 5W-40, Wix XP 51356, 185/55R15 tires, 44 psl
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Discussion Starter · #1 ·
All,

Trying to install water temp and oil pressure gauges in my Smart.

Water - The coolant drain plug is M12 X 1.25 (can someone confirm this, please)
Adapter to 1/8 npt is here -
LMA Gauge Sender Unit Adaptors | Demon Tweeks

Oil - The oil pressure port is 1/8 bspt,
adapter to 1/8 bspt to 1/8 bspt with 1/8 npt on the side is here -
LMA Oil Pressure Remote T Piece | Demon Tweeks

Small 1 7/8 gauges, set of three -
https://www.amazon.com/Auto-Meter-2...qid=1490483630&sr=8-8&keywords=auto+gauge+set

Still a work in progress, please comment / suggest improvements...
 

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Ultra gauge works great and mounts with Velcro on dash drawer. The most important parameter to watch (and add the audible alarm) is the coolant temperature. Overheating the engine for a long period of time sometimes results in throwing away the engine.....
 

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In my opinion the most important gauge to watch and set an alarm for is the voltage.
If the voltage drops and stays it could mean a couple things, but number 1 is the fan belt could have broken.
If the belt has broken the water pump quits and engine over heats.
The voltage will drop instantly if the belt breaks. Coolant temp takes a bit longer.
Kinda like the old air cooled VW's, if the alternator light came on it's not generating OR the fan belt has broken.
 
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