Changed out the impeller and top housing on the Water pump. The steel impeller housing was spinning a little inside the housing is the reason for changing the top housing.
I am getting an alarm now and I know it is directly related to the water pressure as it goes off when my water pressure drops. To keep the water pressure in the correct range I have to trim the motor down. This is a new occurrence as it previously did not occur. No motor height changes have occurred. Also changed the water lines coming out of the T-Stats.
The only constant is at WOT fully tilted it loses pressure dropping to around 8 psi and the alarm sounds, trim down and the pressure comes back up and the alarm stops. At lower speeds it is fairly random at when the pressure drops and I wont always get an alarm.
1. Can you over tighten the top housing?
2. This unit requires a dam of sealant. I had a time getting the lower unit back in, is it possible that the dam failed?
Could either of the above cause this?
I haven't checked either of these yet, but I can certainly see either 1 or 2 happening. I plan on checking them this weekend, but just wondering if I should be looking at something else, maybe T-Stats or a partially blocked line somewhere?
2005 Charger 496TF 300 Yamaha HPDI.