Ridered4583
NAXJA Forum User
- Location
- Raleigh NC
Happy to be back on the forums after many years. I finally have a couple "new" XJs in the stable. A 91 and a 98. My problem is with the 91. The Heater Control Valve has failed. I have seen many write ups on deleting it, and that is the route I am going as I can not find a replacement part with satisfactory reviews and I don't need this seemingly useless part failing again. My question is, how important is the direction of coolant flow through the heater core? On many bypass write ups I see the 5/8 hose that comes from the water pump being run to the 5/8 outlet of the heater core. and the 3/4 (11/16) run from the T-stat to the 3/4 inlet. This is also the way my 98 without a HCV is routed from the factory. It throws me off though because this will reverse the flow from factory on my 91. As designed in the 91 with the HCV the coolant would flow in the bottom of the core and out the top. In that case I would have to do as shown in a few other peoples HCV deletes and cut and adapt each hose in the middle so it would be a 5/8 in 3/4 out and vice versa on the other hose. So can I just go to the much simpler 97+ style or would I be better off keeping the flow as designed in 91. It would seem in 96 the engineers just decided to do what I am about to and say forget this stupid plastic failure prone piece. So any feed back from anyone who has done an HCV delete would be greatly appreciated.