Hey all. 98 sport 4.0 here. I am having the hardest time finding the stopcock for the radiator. Where and how to I get to it? Also what are some ideas on radiator flushes?

thanks!

 

This is the way I flushed our '98 XJ. Disconnect the top rad hose and the 3/4" heater hose at the t-stat cover. Remove t-stat cover, remove t-stat and replace t-stat cover. Disconnect the bottom rad hose at the water pump. I didn't touch the rad drain plug. Run water from a garden hose through the top rad hose. This will flush most of the loose stuff that's in the rad out through the bottom rad hose. Run water from the garden hose through the 3/4" heater hose. This will flush most of the loose stuff that's in the heater core out through the water pump. Run water from the garden hose through the 3/4" nipple on the t-stat cover (again, t-stat removed). This will flush most of the loose stuff from the cylinder head and engine block out through the water pump. Flushing the cooling system this way eliminates loose stuff from (the heater core/cylinder head/block) getting stuck/deposited in the radiator.

One of these attached t the garden hose works great when doing a flush.

 

Thanks for the tip. Never thought about that!

 

by stopcock do you mean drain plug? if you do it should be bottom left as you are lookin at it from the front but you can just pull your lower rad hose instead

 

yep. i mean drain plug. sorry chem lab never left me.