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Engine/Transmission (1998.5 - 2002) BHAF service - and a heads up...

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My BHAF was getting sorta grungy on the outside:



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UGHHHHhhhh!



SO, time to see what was needed to get the intake back up to snuff. Took off the Outerwears, revealing the underliner my wife sewed up for me while I waited for the Outerwears to arrive - I had also applied some K&N filter oil to that liner that was left over from my K&N filter days:



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HMMmmm - not bad, but not good either - better pull it off too, and check out the actual NAPA BHAF filter media to see what it looks like:



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WOW! Not bad at all - in fact, it looks as clean as when it came out of the original box!



OK. so a look around in the BHAF mount area turned up this surprise:



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A closer look:



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HMMmmmm - a contact point of wear, a "dimple" where the end of the BHAF has rubbed into the air conditioning line - not good!



Here's the correction:



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Some hose split, and placed over the line to protect it - that line also sits directly upon the inner fender well - and is exposed to point of contact wear there as well, so the hose fix takes care of 2 points for the price of one - sure glad I caught the problem before the A/C line was punctured!



SO, washed both covers, and re-installed the BHAF:



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Finished!



So what's the point?



Well, one point is that the Outerwears, plus the added inner lining, can greatly provide beneficial pre-filtering for the BHAF, extending it's service life without any detectable added airflow restriction.



Second, is that it's a good idea to check out the after effects of some of our "shade tree re-engineering" - sometimes we just might be trading one problem for another... ;) :D
 
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Good Post Gary!



Thanks for the input. I have read about this before but was not sure where to look.



The pictures make it crystal clear.



I'm checking it in the morning.



AJ
 
Dang it!!!



Same problem here! :{



Only it was wearing all the way across. The tubing mod works like a champ!



Thanks again... ... Saved me some $$$$.



AJ
 
Good write up Gary. I've kinda quit posting on BHAF threads, but that is one of the points I always make. I usually use either water hose or heater hose, whatever is handy at the moment.



Another that I've preached since that first BHAF thread back in 2001 is the importance of using a stiffiner. I like a piece of 4" exhaust pipe 1" long. Many get by without it, but why take a chance on the plastic deforming and allowing a leak.



RR
 
Another that I've preached since that first BHAF thread back in 2001 is the importance of using a stiffiner. I like a piece of 4" exhaust pipe 1" long. Many get by without it, but why take a chance on the plastic deforming and allowing a leak.



I wasn't going to mention it, but since you brought it up, I too noticed a slight deforming at the BHAF neck where the hose clamp had caused a small area of collapse - fortunately, I happened to have a inch and a half long piece of 4 inch exhause pipe I had originally picked up for that exact purpose - then thought the BHAF neck material was strong enough on it's own to not need it.



I was wrong... :rolleyes:



Thanks for the reminder! ;)
 
moparguy said:
Good write up Gary. I've kinda quit posting on BHAF threads, but that is one of the points I always make. I usually use either water hose or heater hose, whatever is handy at the moment.



Another that I've preached since that first BHAF thread back in 2001 is the importance of using a stiffiner. I like a piece of 4" exhaust pipe 1" long. Many get by without it, but why take a chance on the plastic deforming and allowing a leak.



RR



It must have been your thread, that I read? I did a similar mod.



I did the same thing. Only I made it a little longer. It made sense to me too smooth the airflow past the first few ribs in the boot. Not really sure how much difference it makes (probably none). I just figured the smoother the flow... . The better.



https://www.turbodieselregister.com/user_gallery/displayimage.php?&photoid=23715&width=0



In this configuration you can really clamp the crap out of it too.



AJ
 
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