Exhaust Leak Question !
Thread Starter
|
Freshman User
Joined: Apr 2004
Posts: 40
Likes: 0
Exhaust Leak Question !
Hi Everyone. I Have A Minor Exhaust Leak On My 69f100 (which Sounds Kinda Cool Lol) . Just Wondering If I Am Hurting The Motor At All (360) If I Leave It Alone. Im Gonna Eventually Fix It But Just Curious If Im Doing Harm To The Motor At All. Thanks All Of You :-x01
Post Fiend
Joined: Feb 2001
Posts: 6,624
Likes: 8
From: Missouri
Welcome to FTE!!!!
You can hurt the exhaust valve. When you have a leak air will flow both ways through it due to camshaft overlap. This will cause cold air to hit a very hot valve and over time you will get the same effect as dumping boiling water on an icy windshield in the winter. They are best to be fixed but I have seen some go for a long time (my old 360) and it didn't hurt anything.
You can hurt the exhaust valve. When you have a leak air will flow both ways through it due to camshaft overlap. This will cause cold air to hit a very hot valve and over time you will get the same effect as dumping boiling water on an icy windshield in the winter. They are best to be fixed but I have seen some go for a long time (my old 360) and it didn't hurt anything.
Elder User
Joined: May 2002
Posts: 799
Likes: 0
Originally Posted by Ratsmoker
Welcome to FTE!!!!
You can hurt the exhaust valve. When you have a leak air will flow both ways through it due to camshaft overlap. This will cause cold air to hit a very hot valve and over time you will get the same effect as dumping boiling water on an icy windshield in the winter. They are best to be fixed but I have seen some go for a long time (my old 360) and it didn't hurt anything.
You can hurt the exhaust valve. When you have a leak air will flow both ways through it due to camshaft overlap. This will cause cold air to hit a very hot valve and over time you will get the same effect as dumping boiling water on an icy windshield in the winter. They are best to be fixed but I have seen some go for a long time (my old 360) and it didn't hurt anything.
You normally have really high velocities rushing past the valve seat (often sonic flow) when the exhaust valve opens. And because of that high velocity, you also have high rates of heat transfer. And when you have excess oxygen -- Kind of like hitting the lever on your cutting torch. My two cents...
Last edited by mlf72f250; May 8, 2004 at 12:08 PM.
Thread
Thread Starter
Forum
Replies
Last Post
peanut2001
1973 - 1979 F-100 & Larger F-Series Trucks
5
Dec 28, 2005 09:37 PM
RUSTANG67
1994.5 - 1997 7.3L Power Stroke Diesel
4
Nov 13, 2005 09:52 PM
