I’m doing some winter prep on my ’99 4.0L Auto, 99,850mi, 3” lift. I got the XJ w/80,000mi almost 2 years ago.
I’m flushing the cooling system for the first time since I’ve had it. I used the 7 hour Prestone stuff, left it in for two days for good measure, then used the 15 min stuff, left it in for an hour, now the water is clear, and the engine is running smooth.
I have new hoses, upper and lower radiator and the two heater hoses. I’m planning on replacing them, however I also have a new water pump and thermostat housing, I got them off of Ebay, from Mako Offroad, they claimed to be “High Flow”.
My question is; would you replace the water pump and therm housing? On the one hand the engine has almost 100,000mi on it and I figure I would rather replace it now while it’s reasonably warm, then have to do it when it’s 3 degrees out in the middle of feb. But on the other hand “if it ain’t broke, don’t fix it” comes to mind. The gaskets are good, no leaks, and the pump seems to be fine, so I would hate to monkey with it just to put in an inferior part that I have to replace again in a few months.
What do you guys think?
I’m flushing the cooling system for the first time since I’ve had it. I used the 7 hour Prestone stuff, left it in for two days for good measure, then used the 15 min stuff, left it in for an hour, now the water is clear, and the engine is running smooth.
I have new hoses, upper and lower radiator and the two heater hoses. I’m planning on replacing them, however I also have a new water pump and thermostat housing, I got them off of Ebay, from Mako Offroad, they claimed to be “High Flow”.
My question is; would you replace the water pump and therm housing? On the one hand the engine has almost 100,000mi on it and I figure I would rather replace it now while it’s reasonably warm, then have to do it when it’s 3 degrees out in the middle of feb. But on the other hand “if it ain’t broke, don’t fix it” comes to mind. The gaskets are good, no leaks, and the pump seems to be fine, so I would hate to monkey with it just to put in an inferior part that I have to replace again in a few months.
What do you guys think?