4.0 SOHC head gaskets/timing chains

[JJMaine]

IMO its fine to run that fan. As long as bearings are good rn.

Is that common to have a new fan be out of shape like that? I know it's the fan itself just a little out of whack and not any bearings or anything so I don't mind running it. As long as it won't kill my water pump prematurely it won't bother me a bit.

Do you mean it's fine to just run the fan forever or run it until I replace it? It's an OEM fan and I'm wondering if the new one will be just as wobbly?

 

[alwaysFlOoReD]

I'm not sure about running forever. I can't see it being terribly out of balance but I'm not an engineer. And I can't see it in person. Personally I'd probably run it as is but I'm a risk taker.
Have you checked the mounting surface for casting flash or improper machining?

 

[JJMaine]

No I haven't yet checked anything yet.

 

[JJMaine]

Do you guys know how long it takes the PCM to "relearn" the IAC valve after having the battery disconnected for so long while the engine was out? My truck start up flare goes to 2k rpm while it was always 1500rpm prior. Also notice that since putting the engine back in it takes a few extra cranks of the engine (than what it used to) before it starts. Nothing too crazy but definitely doesn't fire right up like it used to.

I'm thinking these might be related and might improve with time as well as pretty good idle fluctuation when the AC compressor kicks on when using defrost?

 

[sgtsandman]

Do you guys know how long it takes the PCM to "relearn" the IAC valve after having the battery disconnected for so long while the engine was out? My truck start up flare goes to 2k rpm while it was always 1500rpm prior. Also notice that since putting the engine back in it takes a few extra cranks of the engine (than what it used to) before it starts. Nothing too crazy but definitely doesn't fire right up like it used to.

I'm thinking these might be related and might improve with time as well as pretty good idle fluctuation when the AC compressor kicks on when using defrost?

I honestly never paid attention. With the fuel pump issue on the 2011, I had the battery disconnected for a fair amount of time. I have not noticed the start up rpm being any higher or being higher for longer than normal. But I also have not pulled the engine either, or replaced a bunch of stuff.

 

[JJMaine]

Yeah, I was reading up on how to adjust the start up flare on my IAC and came across some posts on how unplugging the battery resets the PCM so then your truck needs to relearn idle procedures etc.

It's hard because I don't believe I have a good true baseline since my truck had slight head gasket issues since I've owned it. I think I'll just give it some time to straighten itself out and if not I'll try adjusting my IAC. I know I don't need it to go to 2k rpm on every start up.

 

[Uncle Gump]

Mine has always had a pretty good "flare" on a cold start. 2k rpm sounds about right... I'll doub.e check it. It quickly settles down though.

I will also add... since putting the battery tender on it... it starts way quicker. Having the battery at peak performance... it's really night and day now.

One more thing... you might be a bit hyper sensitive since all the work you put into it. Pay attention to it but don't go paranoid.

 

[JJMaine]

You're absolutely right about being hyper sensitive. Good point on the battery. It is a NeverStart from 2023 so.... Maybe the 2k rpm is normal and mine was only going to 1500rpm because of the misfire issues I had. Mine also settles right down quickly.