scott1984 Posted August 23, 2011 Share Posted August 23, 2011 customer complains of coolant loss first off cant road test trans is out suncoast is going in. Pressure check both coolant system no pressure drop any ideas Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted August 23, 2011 Share Posted August 23, 2011 E.G.R. Quote Link to comment Share on other sites More sharing options...
Fordracer Posted August 23, 2011 Share Posted August 23, 2011 Or cavitated front cover. Is oil overfull? Quote Link to comment Share on other sites More sharing options...
Mikill Posted August 24, 2011 Share Posted August 24, 2011 If oil is not overfilled with coolant then i would test the horizontal cooler Quote Link to comment Share on other sites More sharing options...
Steve Mutter Posted August 24, 2011 Share Posted August 24, 2011 And if all of the above noted stuff checks out put a pressure gauge on the cooling system and drive the shit out of it to see if you have high cooling system pressure. I had one 6.4 that had leaking head gaskets and damaged cylinder heads. Quote Link to comment Share on other sites More sharing options...
Brad Clayton Posted August 24, 2011 Share Posted August 24, 2011 Super easy way to check for egr/head sealing issues before digging in: Diggin' that avitar Quote Link to comment Share on other sites More sharing options...
scott1984 Posted December 7, 2011 Author Share Posted December 7, 2011 sorry i have not updated but found the coolant lost by blowen head gaskets pull the cab and seen blow out on all eight cylinders Quote Link to comment Share on other sites More sharing options...
Keith Browning Posted December 7, 2011 Share Posted December 7, 2011 Head gaskets on a 6.4L? Rare no? BTW Brad, funny you should post that pic... I somehow smashed my bottle of CO2 tester fluid closing a toolbox drawer yesterday. Almost flippin full too. Quote Link to comment Share on other sites More sharing options...
Mikill Posted December 9, 2011 Share Posted December 9, 2011 Head gaskets are very rare but I have seen one pushing coolant out of the bottle. Quote Link to comment Share on other sites More sharing options...
BrunoWilimek Posted December 12, 2011 Share Posted December 12, 2011 Unlike the 6.0 that regularily blows head gaskets, the 6.4 seems to be less prone to this type of failure. I have personally only done one set. I find most of them have a set failure pattern. The first thing to leak is the rad. Pressure testing usually shows up the leaks easily if this is the case. Also causing external leaks are the rad hose internal o-rings. Look for white staining at all of these connections(Ford now has updated the hoses with 2 internal o-rings). Next to go is usually the horizontal cooler. I have done lots of these and never a vertical one. Usually next is the front cover, with cavitation issues. The one head gasket job I did started with the horizontal cooler, it still lost coolant, then while I had the cab off to do the head gaskets, I checked the front cover and thermostats and they were OK. Quote Link to comment Share on other sites More sharing options...
lmorris Posted December 13, 2011 Share Posted December 13, 2011 Done 2 sets myself. Both were F350's pulling trailers that should have been pulled by an F450 or F550. Left gasket blown out on both, #4 and #6. Quote Link to comment Share on other sites More sharing options...
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