Originally Posted by python
the reason it did that is because the red coolant tends to cake up,once it starts a slow leak it can and will dry to a crust(had it happened to me) and if its not bad enough u aren't going to see it until it gets worse. also a water pump failing because of a leak wont cause the car to over heat...the car over heats when theres not enough coolant in the system to do its job. the only way a water pump will cause a car to over heat is if the impeller disintegrates and cant circulate the fluid...or if the belt isnt running it obviously. btw I went through 3 aftermarket pumps before I went to the dealer and purchased one there...save urself the headache and just pony up for the one from the dealer.
Well Python, I have had this service done on my old 98LS and just recently on my 02 LS430 both at the dealership so I agree with you 100% when it comes to dealer parts for this job. When I bought this 99LS the big selling point was the TB/WP were just replaced and the individual gave me the old parts when I purchased(79,000 miles on the clock at purchase)but I can't be sure if OEM parts were used. As far as the no overheating issue, at least twice while trying to hunt the leak I had to refill a little more than 2 gallons of coolant after driving in this Texas heat with a/c running in stop and go traffic and the temp never moved from the "normal" position. When I initially noticed the leak I had just come off a 200 mile trip from Louisiana and like always I check fluids before and after I get on the road. System was full before I left, but bone dry when I got back to Texas once again stop and go traffic I dealt with in both locations with a/c...still didn't overheat. With no puddle under the car the next morning I could only assume from the rate of leakage that the system was dry for most of the trip back to Texas since I had to replace about 2.5 galloons that morning. I recently changed the coolant temp sensor so I know the gauge works fine. I just thought that was amazing. And thanks for the photos Aptoslexus I appreciate that my friend.....