I have only a little bit of input to add. glnr12 is right, it shouldn't be bouncing around. Mine used to do that, till i changed my timing belt, bled the system and then it never bounced. I then replaced a hose that led off the throttle body to the block and ever since the gauge has been bouncing. my only idea is that there are pockets of air that are causing the gauge to bounce like it is due to the air being hotter than the coolant. So i've been bleeding the system for like two weeks now having the front up on ramps to see if i can get it all to make it's way out of the system.
I guess to summarize, i think the bouncing is due to pockets of air in the cooling system.
I guess to summarize, i think the bouncing is due to pockets of air in the cooling system.
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