DIY: AIP & Timing Valve Replacement Write-Up

So a few requests to do a write up. 6 months ago I got P0419 code and P2442 so I replaced the pump and valve using the Chilton Manual Procedures. Got the CEL and codes for the other pump and valve so I replaced those last night. Enjoy, I would have taken more pictures but my hands quickly became filthy and I didn't want to foul up my fancy smartphone.

Step 1: Find and locate connectors under hood (Below). Disconnect connectors and remove cable connectors. Both are located on passenger side towards the front of the truck. NOTE: I HIGHLY Recommend that you mark the connectors so you remember which one goes back where. If you're replacing both at the same time (which is a smart idea), Pump 1 connector connects closer to the grill and Pump 2 connector is practically underneath the main air intake tube/hose. Example, female and male connectors mark with an A for one and B for the other, then mark the same A and B on the new connectors. Once they feed back through into the engine compartment, you will have no idea which is which.


(This picture needs to be rotated)


(excuse my low tech pointing)

Step 2: Remove front passenger wheel.

Step 3: Pry back plastic cover in wheel fender.

Step 4: You will see pump assembly in fender well (Below). Pull out rubber hoses, then find and remove qty 2 bolts and qty 2 nuts to free bracket assembly (10 mm).




Step 5: Pull out assembly and loosen air inlet hose to appropriate pump (Below). Pumps are not bolted in, just pry out rubber 'legs?' from pump.





Step 6: Install pump assembly by following steps in reverse order.

Step 7: Crack a cold one, you're done.

For the valve, Bank 1 is on the right side of the engine compartment and is bolted to the block with 3 bolts and is bolted to the air injection flange with 2 bolts. Just pops out then pop the new one in.

 

Nice write-up! I'm sure this will come in handy for many!

 

Thanks for the write up. Love the low tech pointing

 

What year is the truck?
I noticed the "snorkels" are the upgraded model that are supposed to be the fix for the air pump problem. Did you install these when you replaced pump?

 

2011, Yes I replaced the snorkel with the upgraded one when I did the first pump.

 

Hah, I should do a write up on the arrows. Lol they're just cardboard that I cut and wrapped in green tape around a screwdriver.

 

Sweet, I have officially arrived now that I'm published!

 

Started around 8pm and was done at about 10pm. Roughly two hours. Took me a little longer the first time.

Write up took me about 15 minutes.

 

Don't buy them unless you need them. You have a 2012 so likely you've got a 50/50 chance you won't need them ever. The $4k quote is usually on the 4.7L engines as they require more disassembly than the 4.6L.

I've got mixed feelings about the bypass kit. I've heard a few horror stories about the ECM flash upgrade from the dealership causing the bypass kits to throw an error code and not being able to pass emissions.

I bought everything from Amazon and was pretty easy to get, the same parts are used in the Sequoia and a few other vehicles.

Upgraded Air Inlet Tube: $30?
Pump 1: $164
Pump 2: $164 (they're identical)
Valve 1: $275
Valve 2: $180

Case of Bud: $20

Having enough $$ leftover to buy a gadget for the garage that I'll probably only use once in 10 years: Priceless

 

Could you share info on the parts you chose from Amazon? Particularly the air inlet tube and valves?

Amazing DIY. Thanks!

 

It's all in here.

 

Thank you sir

 

Im going to fab up some of those for use in my next build pics.

 

Blue tape version

 

Your arrows are awesome!!!

 

If you order the replacements, you should be able find them visually since you know what they look like. I didn't have to remove anything to get to them except the plastic engine cover. I'll try to get a pic for you next chance I get.

 

Awesome guide! I've been planning on doing this eventually. One (or both) of my pumps have some rocks or something inside them.

 

Good stuff. Will pull down to check for corrosion..

 

What’s the symptoms?

 

Hi everyone I had this issue as well and replaced everything. However now is showing me an issue with one valve Bank 2
Do you know which is the bank 2 the passengers or drivers side valve ?
Thanks