lraffe1 Posted October 14, 2008 Share Posted October 14, 2008 I have a 6.4 that is overheating while driving down road, but will idle all day with out overheating. I pressure tested system and has no leaks, checked for blown headgasket and okay. I also checked cooling fan clutch and is okay. I called hotline and was advised to remove front cover and inspect. I removed water pump and machined surface on front cover is okay. My question is if there could be a problem with cover in different place or should i reassemble and replace t-stats any suggestions. Quote Link to comment Share on other sites More sharing options...
GregKneupper Posted October 14, 2008 Share Posted October 14, 2008 Your t stats are more than likely the cause. I have replace quite a few that were mangled up pretty bad. I would pull those and inspect them next. Quote Link to comment Share on other sites More sharing options...
rlchv70 Posted October 16, 2008 Share Posted October 16, 2008 Did you check to see if the water pump shaft is connected to the impellar? I've seen impellars spin on the shaft. Quote Link to comment Share on other sites More sharing options...
lraffe1 Posted December 16, 2008 Author Share Posted December 16, 2008 After removing t-stat I compard to new and found one of the two was coming apart. I replaced t-stat and did not overheat. Quote Link to comment Share on other sites More sharing options...
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