AIH - delete or not?
Thread Starter
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Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
AIH - delete or not?
I was planning on deleting my AIH and use the port for my boost guage. With the cold weather we have been experiencing lately, I've been wondering if this is a good idea or not. We saw 15 below last week and have seen 25 below in past winters.
Would I be making a big mistake by deleting this heater with these conditions?
Would I be making a big mistake by deleting this heater with these conditions?
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,112
From: Rio Rico, AZ.
That's a tough call for me. Not very experienced with weather that cold, lived in Seattle all my life. If I was to try it I would keep all the parts neccessary for restoration just in case it doesn't work out. At the very least I would leave the EBPV in place.
That said, it probably would be ok if you have a load all the time, to make the engine work a little harder than usual. It needs to generate heat.
That said, it probably would be ok if you have a load all the time, to make the engine work a little harder than usual. It needs to generate heat.
Senior User
Joined: Jun 2003
Posts: 452
Likes: 0
From: SC
I was also wondering what the “actual” gain for this mod is. I know it helps air flow or suppose to. Does anyone have any factual data? I don't do mods just so I can state I have them. Now if they are proven to be a benefit, I will do them.
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
JMO, but having done the AIH delete, I think it is a waste of time.
You can use the same drill and tap that you used to install your pyrometer probe to drill and tap a hole in you intake horn for the boost, or splice into the map line.
You can use the same drill and tap that you used to install your pyrometer probe to drill and tap a hole in you intake horn for the boost, or splice into the map line.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
that coil that the AIH used, was very large, and it had to be restrictive. i just used the plug from blackclouddiesel, and it works well. i still have the element. i would experiment for a week- unbolt the wire loops, and just tuck them out of the way. if you see blue smoke or white smoke during normal warmed-up operation, it is safe to take it out. if you see blue/white smoke, chances are is that the air is too cold that is going into the engine (rarity) and not making a clean/efficient burn.
Postmaster
Joined: Jan 2004
Posts: 4,758
Likes: 7
From: colorado
take it out. it is only there to reduce smoke during warm up and has nothing to do with starting. its more of an image thing than a nedded function...$40,000 trucks shouldn't smoke when they are cold.
ps. ford added the AIH the International engines do not have them.
ps. ford added the AIH the International engines do not have them.
Thread Starter
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Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
Thanks for all your opinions, that's what I was looking for. I think I will try removing it, use the BCD plug I bought and see what it does. Everything I remove, I keep intact so it won't be much to put it back if needed. I didn't want to try it if some folks had major problems in cold weather without it. Thanks again ....
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Posting Guru
Joined: Aug 2004
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From: Rural Central Ohio
Originally Posted by fordafied
I was also wondering what the “actual” gain for this mod is. I know it helps air flow or suppose to. Does anyone have any factual data? I don't do mods just so I can state I have them. Now if they are proven to be a benefit, I will do them.
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Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
Originally Posted by edub32
BCD "claims" a 20% airflow but idk if thats true or not.
I saw absolutely no effect from removing it, other than my pickup smokes a LOT more when it's cold out.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Originally Posted by clux
Yeah, and they sell plugs for the port. it might be an issue if it was on the intake side of the turbo, but this thing is in charged side of the intake system. At positive pressure (boost) the heater isn't going to stop any air from getting into the cylinders.
I saw absolutely no effect from removing it, other than my pickup smokes a LOT more when it's cold out.
I saw absolutely no effect from removing it, other than my pickup smokes a LOT more when it's cold out.
Thread Starter
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Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
My take on it after spending 23 years in HVAC, a restriction in the cold air return (intake) or heat duct (exhaust) is still a restriction and will effect air flow. With reguards to the AIH, I do not have any idea of how much that restriction would affect performance.
