Inspection cover leak 1984 470

shiloh87

Seaman
Joined
May 9, 2021
Messages
65
Now that the engine is drained...., the coolant was pretty cruddy after 4 hrs of run time, can I do a coolant flush without a thermostat installed, thinking the new thermostat might get messed up or clogged. Or should I get 2 thermostats, use one for the flush.
I did clean the cast iron exhaust manifold and elbow they were pretty rusty and chunky but I guess not good enough.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,585
new doesnt mean accurate. use an IR thermometer.

if your motor runs cooler than 140, it will wear out quickly.
 
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