B20 Overheating

phil brooks

New member

Equipment
B20, 4ft bush hog, back hoe (not Kubota B20), landscape rake, snow plough, etc
Hi, similar to my other thread, my B20 when under load of mowing up hill (4ft bush hog), she overheats and boils over after about 15 minutes. plenty of water in the radiator and the front grill is clean and the fan is working. Any suggestions gratefully received

thanks
 

85Hokie

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Equipment
BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
Jul 13, 2013
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Bedford - VA
Sounds like a head gasket .........

open radiator cap - start (cold) engine, look for any bubbles in radiator.
Leak down test could help determine which cylinder too.

Stuck thermostat possible.
 

D2Cat

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Equipment
L305DT, B7100HST, TG1860, TG1860D, L4240
Mar 27, 2014
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40 miles south of Kansas City
Might want to spray some cleaner on the radiator, let it soak for a few minutes and flush. Often times we thing the radiator is clean, but it has a build up of dirt/oil/etc. on fins.

If your head gasket IS leaking a dirty radiator can sure be a contributor!