Exhaust leak fixed
Senior User
Joined: Jan 2011
Posts: 362
Likes: 0
From: SF Bay, CA
Yes. I noticed what I think may be a minor exhaust leak shortly after the UVCH came loose and the engine was running rough. I suspect some of the exhaust manifold and/or up-pipe nuts/bolts might have loosened slightly.
I figured it couldn't hurt to just do a nut and bolt check w/o pulling things apart. I can't afford up-pipes right now so that is out of the question.
Posting Guru
Joined: Feb 2005
Posts: 1,319
Likes: 1
From: Oregon
If you cannot seal the manifold leak by tightening you can remove it and most machine shops can resurface them, I have had dozens of them done and the shop only charges $26.00 each, you might even find a place that will do it cheaper. Fairly simple to remove and install. There is also gaskets available for a "bandaid" fix.
Thread Starter
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Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Al, I know for sure your up pipes are leaking. As far as the manifolds, PM Andy and see if he knows a place near him that does machine work on Saturdays. We are planning on getting together again next Saturday over there and we could pull the manifolds and have them done that afternoon.
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
I can bring my compressor and air tools if necessary.
Stewart
Senior User
Joined: Jan 2011
Posts: 362
Likes: 0
From: SF Bay, CA
Al, I know for sure your up pipes are leaking. As far as the manifolds, PM Andy and see if he knows a place near him that does machine work on Saturdays. We are planning on getting together again next Saturday over there and we could pull the manifolds and have them done that afternoon.
Peter,
By next Sat, do you mean March 5th?
If so, I'll be there. I need to replace a tie rod and oil and could use a second set of eyes making sure I don't do anything stupid.
I won't have time to pull manifolds and machine them during March. Busy month for me. 1st race is the weekend of March 11-13 and that will also be my first tow so I need to get some front end issues resolved, get the truck aligned, buy a replacement trailer wiring plug at the bumper (original one was cut off) and learn about brake controllers and whether the truck has one.
Super Moderator
Joined: May 2004
Posts: 29,380
Likes: 118
From: Central Coast of CA
Al, if you can afford it, get the Tekonsha Prodigy (newest version is the P3, but you can still get the Prodigy) and we can mount it in your truck. This is what it looks like:
Then go to a trailer store and get the Ford specific harness for the '99 - '03 trucks. It looks like this, but with the bare wires on the end where the flat plug is:
The end where the brown plug is located is the Ford specific plug. It plugs into the harness plug behind your dash, located here:
That keeps you from needing to splice into the harness behind your dash.
Stewart
Then go to a trailer store and get the Ford specific harness for the '99 - '03 trucks. It looks like this, but with the bare wires on the end where the flat plug is:
The end where the brown plug is located is the Ford specific plug. It plugs into the harness plug behind your dash, located here:
That keeps you from needing to splice into the harness behind your dash.
Stewart
Thread Starter
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Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Peter,
By next Sat, do you mean March 5th?
If so, I'll be there. I need to replace a tie rod and oil and could use a second set of eyes making sure I don't do anything stupid.
I won't have time to pull manifolds and machine them during March. Busy month for me. 1st race is the weekend of March 11-13 and that will also be my first tow so I need to get some front end issues resolved, get the truck aligned, buy a replacement trailer wiring plug at the bumper (original one was cut off) and learn about brake controllers and whether the truck has one.
By next Sat, do you mean March 5th?
If so, I'll be there. I need to replace a tie rod and oil and could use a second set of eyes making sure I don't do anything stupid.
I won't have time to pull manifolds and machine them during March. Busy month for me. 1st race is the weekend of March 11-13 and that will also be my first tow so I need to get some front end issues resolved, get the truck aligned, buy a replacement trailer wiring plug at the bumper (original one was cut off) and learn about brake controllers and whether the truck has one.
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Lead Driver
Joined: Nov 2007
Posts: 5,578
Likes: 1
Peter,
By next Sat, do you mean March 5th?
If so, I'll be there. I need to replace a tie rod and oil and could use a second set of eyes making sure I don't do anything stupid.
I won't have time to pull manifolds and machine them during March. Busy month for me. 1st race is the weekend of March 11-13 and that will also be my first tow so I need to get some front end issues resolved, get the truck aligned, buy a replacement trailer wiring plug at the bumper (original one was cut off) and learn about brake controllers and whether the truck has one.
By next Sat, do you mean March 5th?
If so, I'll be there. I need to replace a tie rod and oil and could use a second set of eyes making sure I don't do anything stupid.
I won't have time to pull manifolds and machine them during March. Busy month for me. 1st race is the weekend of March 11-13 and that will also be my first tow so I need to get some front end issues resolved, get the truck aligned, buy a replacement trailer wiring plug at the bumper (original one was cut off) and learn about brake controllers and whether the truck has one.
Stewart it is sounding like bringing your air compressor and tools will be handy IMO. Hope I can make it!!!
Mountain Pass
Joined: Sep 2007
Posts: 244
Likes: 4
From: Alaska
Probably worth inspecting your exhaust manifolds for leakage back next to the firewall. These 7.3s seem to be prone to leakage on the two rear-most cylinders.
Mountain Pass
Joined: Sep 2007
Posts: 244
Likes: 4
From: Alaska
Nothing special about the bolts. They're 10mm x 1.5 thread. I think the up-pipes that are fastened to the exhaust manifold adjacent to the firewall likely exert some push-pull forces during expansion and contraction of the up pipes that leads to the problem on the #7 and #8 exhaust manifold leakage.
I intend to check mine every 10,000 miles or so - maybe every other oil change - and re-torque to the specified 45 ft-lbs as necessary.
I have both of my front plastic fender liners out right now. Makes it really easy to inspect and access the back four exhaust manifold bolts. I pulled those four and put some anti-seize compound on them multiple times while running them in and out repeatedly on the passenger side. On the drivers side, I decided to run a thread tap into the exhaust manifold female threads to clean up the threads prior to using anti-seize compound. Also cleaned up the threads on the a few of the bolts that were a bit rough - visually.
I intend to check mine every 10,000 miles or so - maybe every other oil change - and re-torque to the specified 45 ft-lbs as necessary.
I have both of my front plastic fender liners out right now. Makes it really easy to inspect and access the back four exhaust manifold bolts. I pulled those four and put some anti-seize compound on them multiple times while running them in and out repeatedly on the passenger side. On the drivers side, I decided to run a thread tap into the exhaust manifold female threads to clean up the threads prior to using anti-seize compound. Also cleaned up the threads on the a few of the bolts that were a bit rough - visually.
Snowboard season cometh..
Joined: Jan 2006
Posts: 5,406
Likes: 1
From: Gulf Coast of Florida
First, make sure they are leaking. No need to fix what isn't broke, right? If you are leaking, you'll need somewhere that can machine the flanges flush & flat.
As for bolts, since no one has mentioned the part# for the bolts, I'd say that unless you break one, I'd clean all the threads (internal and external) and reuse them.
As for bolts, since no one has mentioned the part# for the bolts, I'd say that unless you break one, I'd clean all the threads (internal and external) and reuse them.