Leaking oil coolers and cracked cylinder heads often contaminate the cooling system with engine oil or diesel fuel causing the reservoir to soften and swell - often to the point that the cap cannot even be reinstalled.
Coolant Overflow Tank Degas for Ford 2003 04 05 06 07 F250 F350 6.0L Powerstroke
Overflow Tank Degas Bottle For 2003-2007 Ford F250 F350 Powerstroke 6.0L
Radiator Coolant Overflow Tank Reservoir for 1996-2004 Ford Mustang 4.6L V8, Ford Mustang Reservoir, Ford Mustang Overflow Tank
Car Coolant Overflow Tank, Radiator Overflow Bottle 800ml Aluminum Catch Tank
Coolant Overflow Tank, Aluminum Radiator Tank, Reservoir Expansion Tank Unive...
Coolant Overflow Tank, Radiator Overflow Bottle 800ml Aluminum Universal Black
