COOLANT IS BROWNISH COLORED

[joe_peters]

sinner

OCDer!

 

[winterbeater]

Eventually I replaced my whole coolant system(hoses, t'stat and housing,water pump, radiator) because of this same issue. when I did the swap out I flushed the heater core and the block several times onder pressure with a water hose and got most of it out but now two weeks down the road it is slowly going back to the brown color due to the deposits left in the block and heater core. I found that the best way to get the sediment out is to fill the system with the flush and run it around for a little while then drain and repeat.

That's the way that I would do it, but not doable in the winter.

 

[BLong77]

Definitely sounds like time for a flush and new 50/50 mix of coolant.

You need to pull the overflow bottle and wash it out, the flush won't clean it.

XJs 00-01 with the head with casting number 0331 are the weak units. The later heads with TUPY marked on them are improved castings.

Where is 0331 and TUPY stamped at on the head?