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Tony Zuniga (Tony23007)
Member
Username: Tony23007

Post Number: 140
Registered: 05-2003
Posted on Tuesday, July 15, 2003 - 11:11 pm:   Edit Post Delete Post Print Post

To those who are having problems with overheating Discovery's. I recently well just yesterday fixed my problem. First my car busted the expansion tank, replaced that. Second I noticed that one of my A/C fans was not working after replacing the tank and the A/C fan my car began to show signs of overheating. Changed the t-stat the car still overheated, if I turned my lights on the temp would rise even further. With this I was lead to believe that my temp sending unit was not working correctly. Change my sending unit and when I did this I noticed that the cables to my temp sending unit and the temp coolant sensor were pretty badly worn out. I tested this theory by putting electric tape around them to isolate them from the engine, that fixed my problem now I just have to get some new cables and replaced them. I hope this helps those who have changed everything but still have problems.
 

Will Weatherford (Wweatherford)
Member
Username: Wweatherford

Post Number: 54
Registered: 02-2003
Posted on Wednesday, July 16, 2003 - 06:56 am:   Edit Post Delete Post Print Post

I too have been suffering from intermittent overheating issues. T-stat, radiator rodding, etc. Yesterday, used the test kit to chk for combustion gas bubbling into coolant - liguid stayed blue (negative), so we felt comfortable that the head gasket (replaced @ 15,000mi) was ok, no cracked coolant paths, etc. I observed possible leakage down the bell housing...Finally, we have replaced the intake manifold (aka valley pan) gasket. Upon removal, obvious signs of leakage were noticed from only one to two spots with ultimate coolant combustion and slight run-off onto bell housing in the rear. Also, oil appeared to have been leaking into combustion. A whitish coolant sludge was also seen inside the valve cover (oil cap side). Unfortunately, one must get inside and see what is really going on...

I will keep you all posted on the longer term results of this (work <24hrs old). I can provide the total breakdown of all parts used (3hrs labor).

SIDE THOUGHTS - TAKE NOTE: Its all about having the proper tools and attitude. DIY is great, but I don't have the proper set-up. MY NEW GARAGE (no mo' dealer) took the position of finding / addressing the root-cause and not just putting on band-aids or dealing with symtoms of the problem (since none of this is juicy "WARRANTY" work...) Find a garage with LR-certified techs (formerly w/ a dealership)...who are paid salary vs. just the $$/hr wage - then they will take genuine interest in problem solution and not just dealing with the pressures of squeezing the # cars/wk. The labor rates are at least a 1/3 to 1/2 cheaper than LR, bill against the same work time quote from the books - all while having the skills to pay da bills!

Ciao,
W2
99D1 @ 50,400mi

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