799 Freeze Plug Size???
Thread Starter
Teching In
Joined: Nov 2014
Posts: 2
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799 Freeze Plug Size??? I have a 5.3 aluminum vortec L33 engine. A recent cold spell weakened one of my freeze plugs in the 799 heads and it blew out on me about a week after it got cold. I thought it had antifreeze instead of just water but luckily nothing but the plug was damaged!!! I can't find ANYWHERE that can give me the size plug I need to replace it with. I don't want to use the rubber plugs so I need to know the size metal plug to buy. I called 2 dealerships but they couldn't tell me squat either. It literally blew their minds. One dealership even told me they don't the have freeze plugs on them??
Thread Starter
Teching In
Joined: Nov 2014
Posts: 2
Likes: 0
This seems to be a million dollar question. I've seen on other forums where the 799 heads expansion plug is 35mm while others say 38mm? I thought sm1 on this forum would know for sure. Even the guys at 2 different dealerships couldn't give me an answer.
Last edited by blackwidow98; Feb 15, 2016 at 09:07 PM.
