Temp Gauge Drops Everytime I Give It A Boot

[snappy_]

Whats the reason to this, its been happening for a couple years now and i still haven't found the reason to why it does this.

Anyone else experience this or have this problem? if so what did you do?

[lachlanw]

shagged thermostat

[mad082]

i doubt the thermostat would do that. normally that will cause the temps to go up, not down. i'd be more inclined to say water pump. at low rpm the pump isn't pumping very much water and it isn't enough to properly cool the engine, then when the revs pick up the pump is pumping a lot more water and is able to cool the engine better. i had an outboard that would do exactly that. new water pump solved the problem.

it may possibly be just an electical short in the system making the gauge do funny things though.

[S1LV3RTRACKS]

I had something similar. Every time I sped up or drove downhill on a coolish day or at night I had my temp gauge start to drop. Car also took some time to warm up. Problem was the seals disintegrated within the thermostat so the water simply pushed past it when it was closed. Changed to a new thermostat and problem gone.

[snappy_]

well now my temp gauge shitted itself?

whats the first thing to look at? the thing doesnt even move anymore.

[ARTZ]

Temp sensor maybe