Coolant system, 400 engine
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Junior User
Joined: Aug 2008
Posts: 78
Likes: 0
From: Spanaway, WA
Coolant system, 400 engine
I've been chasing gremlins in my cooling system for a bit now and the latest is that my radiator leaks. It happens. The next big thing on the horizon is when my radiator gets fixed, I'm afraid the stem on the engine the feeds coolant to the heater is going to give up the ghost. It's already cracked (and missing a chunk of metal) but there was just enough metal below the missing part to clamp a hose on to. Is this part replaceable?? Without taking apart the engine? I found a pic to help illustrate. The pic is from Classic Trucks Magazine and is NOT mine or my work. It's just for illustrative purposes. I didn't want to take apart the hoses in this area of my engine just to take a pic.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
yes it is replaceable. Bring it to Lowe's, HD, or Ace Hardware to match it up. Or if it can wait then consider a stainless steel piece: Performance Stainless Steel Heater Hose Fittings - SummitRacing.com
To remove, stick dowel or socket inside so it doesn't collapse when ya unthread it.
To remove, stick dowel or socket inside so it doesn't collapse when ya unthread it.
Senior User
Joined: Apr 2004
Posts: 235
Likes: 1
From: Fayetteville, NC
X2. I've done this on two 351m's now. Mine actually had a piece of copper plumbing pipe pressed in and it didn't leak for 4 years, but I tapped threads and made a screw in fitting work when I built the engine, I felt it was more reliable in the long run.
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Junior User
Joined: Aug 2008
Posts: 78
Likes: 0
From: Spanaway, WA
I'm thinking this is the way to go. My only question right now is how do I pull the old one out? Just pull?
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Fleet Mechanic
Joined: Jan 2012
Posts: 1,668
Likes: 13
From: Saskatchewan
I had to use a small chisel on mine and knock in one side, then I used a pair of vice grips to pull out the old one. Mine came out in chunks because it was so corroded. Try to keep as much out of the block as possible. Good luck.
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