Winterization question - three plugs

[wrapper]

In the past, I have put in antifreeze after the engine has warmed up to make sure the thermostat is open.

I remove the three plugs (exhaust and water jacket)

This summer everybody was telling me I do not have to remove the three plugs as that will put air into the engine and that will cause corrosion inside.


Comments?

Thanks in advance

[JOHN COOKSON]

I've never winterized an engine.
It seems to me you need the thermostat to be open and the bypass clamped when the antifreeze is drawn into the engine to ensure all the antifreeze goes into the engine.
I thought antifreeze is a corrosion inhibitor.?

TRUE GRIT

[Antibes]

If you put in -100 degree antifreeze there is no need to remove the drain plugs.

[joe_db]

I never remove the drain plugs. I also run the exhaust and water intake into a bucket to let the antifreeze circulate around and around and get nice and hot. Same thing with vinegar sometimes to clean the block too

[zellerj]

Be aware than circulating the water output into a bucket may melt your muffler if you don't have water injected into the hot exhaust gases. I melted my fiberglass water lift muffler doing this.

[joe_db]

Originally Posted by zellerj

Be aware than circulating the water output into a bucket may melt your muffler if you don't have water injected into the hot exhaust gases. I melted my fiberglass water lift muffler doing this.

True - you need to make sure the bucket doesn't get empty Wait - did you mean recirculate just the WATER I run the entire exhaust into the bucket.