[Hudson River Steve]

Hunter,
Yes you can add antifreeze through the thermostat housing, no need to crank over the engine, the antifreeze will find its way. As you said, if a little water is left in the engine it will be OK.

I just winterized my engine on Monday and I used method 2 mentioned previously. I saw the video you posted and am not concerned as I have been using this method for ~20 yrs. It doesn't matter that the RV antifreeze turns to a solid, as the youtube host mentioned numerous times...it didn't expand! Just one clarification, as I stated, I drain the block and manifolds after adding the antifreeze and I also drain the fuel cooler.

Good luck.

[Hunter12345]

Originally Posted by Hudson River Steve

Hunter,
Yes you can add antifreeze through the thermostat housing, no need to crank over the engine, the antifreeze will find its way. As you said, if a little water is left in the engine it will be OK.

I just winterized my engine on Monday and I used method 2 mentioned previously. I saw the video you posted and am not concerned as I have been using this method for ~20 yrs. It doesn't matter that the RV antifreeze turns to a solid, as the youtube host mentioned numerous times...it didn't expand! Just one clarification, as I stated, I drain the block and manifolds after adding the antifreeze and I also drain the fuel cooler.

Good luck.

Thanks, im going to double check the "fuel cooler" step, mines an older 95' v-8 i googled it and it looks to be on the port side below the block drain plug, lower down on the engine. There should be a drain plug there.


'98 mariah shabah 180
5.7l 350 mag
Bravo III