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I believe the reason for the mailing was because exhaust gasses in the coolant system can (and eventually will) react with the coolant additives and deplete the silicates. This can cause pluggage in the EGR cooler and the oil cooler as the solids circulate. I am a believer in casting sand problems, but in a training video Ford states that the silicates precipitating out can be mistaken for casting sand.
From this, it seems that head gasket leaks and EGR cooler leaks can cause depletion of the coolant strength.
The mailing also has a reminder of the oil and filter change intervals and the fuel filter change interval (at normal and special operating conditions).
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Mark
06 F250 CC SB FX4 Lariat 3.73LS 275/65R20;Coolant Filter; High Idle Mod;HFCM Plug;Zoodad;Accufab Elbow; RACCCV6000;JimmiJammers;Ravelco;SynchroMax transfer case;Fumoto valve;Harpooned;LineX;CPOhighwayProducts toolbox;tracrac;Fox Weatherboots;Wet Okole Seat Covers;Stanadyne Performance & B2;PIE adapter;24" ww blades;updated EGR valve;BriteBox;Re-flashed;Quadzilla Recon XZT Fuel Press;Blue regulator spring;DashDAQ;PHP FICM;Dieselsite boots;DCPower250A;Bilsteins;BulletProof EGR cooler;One-piece HPOP fitting
Last edited by bismic; 06-30-2009 at 07:49 AM.
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