Looking for manifold leak
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Cargo Master
Joined: Nov 2010
Posts: 3,244
Likes: 40
Looking for manifold leak
Attempting to find a low boost situation, probably 15 PSI max. Used to get 30 or so. 120cc cali injectors. However, I have 3.55 gears and I added 315/75/16 tires, but also have a 1.00 housing. Up-pipes are new and not leaking.
Started looking at the manifolds, but really can't see anything. My thought was to take automotive paint and spray near the manifold ports in question. Seems easier to see black on a lighter backdrop. Any other tips?
Really frustrating chasing this problem lol.
Started looking at the manifolds, but really can't see anything. My thought was to take automotive paint and spray near the manifold ports in question. Seems easier to see black on a lighter backdrop. Any other tips?
Really frustrating chasing this problem lol.
Thread Starter
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Cargo Master
Joined: Nov 2010
Posts: 3,244
Likes: 40
Typically if I had an idea that something wasn't working correctly I'd just pull it off and r&r it to be sure. However, the manifolds are a different story. I know it is going to suck to do that job.
I've found some boost leaks prior to this job. I'll check again as I think my boost gauge tubing is leaking. IDK if it would cause this much of a reduction though?
Appreciate the reply.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
If you have gaskets on already you're right, they have been worked on. They shouldn't be that bad to do since they've been done before. Spray with some pb a couple days before you start on it to help. The last super duty I did I broke one bolt off and had to weld a nut on it to get it out. The rest came out, and I was surprised, as they were quite rusty.
My suggestion is if you pull the manifold take it to a machine shop and have it surfaced/planed, and use a gasket. Some say not to use a gasket, but without being able to plane the head surface you need it imo.
Any boost leak, even minor, will make a difference. If you have a couple of them along with a manifold leaking you could very well be losing half your boost.
My suggestion is if you pull the manifold take it to a machine shop and have it surfaced/planed, and use a gasket. Some say not to use a gasket, but without being able to plane the head surface you need it imo.
Any boost leak, even minor, will make a difference. If you have a couple of them along with a manifold leaking you could very well be losing half your boost.
Thread Starter
|
Cargo Master
Joined: Nov 2010
Posts: 3,244
Likes: 40
If you have gaskets on already you're right, they have been worked on. They shouldn't be that bad to do since they've been done before. Spray with some pb a couple days before you start on it to help. The last super duty I did I broke one bolt off and had to weld a nut on it to get it out. The rest came out, and I was surprised, as they were quite rusty.
My suggestion is if you pull the manifold take it to a machine shop and have it surfaced/planed, and use a gasket. Some say not to use a gasket, but without being able to plane the head surface you need it imo.
Any boost leak, even minor, will make a difference. If you have a couple of them along with a manifold leaking you could very well be losing half your boost.
My suggestion is if you pull the manifold take it to a machine shop and have it surfaced/planed, and use a gasket. Some say not to use a gasket, but without being able to plane the head surface you need it imo.
Any boost leak, even minor, will make a difference. If you have a couple of them along with a manifold leaking you could very well be losing half your boost.
Hotshot
Joined: Feb 2009
Posts: 10,408
Likes: 75
From: Plankinton, SD
I guess I'm not sure if you can build a tester for the exhaust or not.
Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
If you want to check the intake's and IC pipes, get this at tractor supply etc. This fits right into my turbo's intake hose and put the air to it. Use a soapy water solution in a spray bottle and check for leaks. Sure helped me!
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Cargo Master
Joined: Nov 2010
Posts: 3,244
Likes: 40
I've got a homemade version of those. I've identified a couple of small leaks at the boots. For now I took my truck back to stock as far as intake manifold/ic goes, don't have boost gauge with that so I'll have to use MAP readings on PC or something.
Looking at the painted spot on my exhaust manifold I'm not seeing any soot. Looks as clean as the day as I painted it.
I'm thinking it could be BARO sensor although my sensor readings are not throwing a MIL, or outside of what the factory specs.
Looking at the painted spot on my exhaust manifold I'm not seeing any soot. Looks as clean as the day as I painted it.
I'm thinking it could be BARO sensor although my sensor readings are not throwing a MIL, or outside of what the factory specs.
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