Long story short I changed my Intake Manifold & EGR Valve gaskets due to a code P0420. Checked all Primary O2 sensor, spark plugs, fuel injectors, timing, and exhaust all was good. I narrowed it down to the Intake Manifold, IACV and EGR.
Tools:
-3/8 rachet, air rachet if you have one
-3/8 extensions
-3/8 universal joint
-10mm,12mm,14mm sockets
-phillips screw driver, flat head
-needle nose pliers/adj. pliers
-razor blade
-shop paper towels
-tooth brush, q-tips, wire
-throttle body cleaner/brake cleaner
-copper gasket spray
Parts (OEM HONDA PARTS ONLY) prices may range from your area, cheaper online:
-18715-PB2-000 (GASKET, EGR VALVE) $4.67
-17115-PAA-A01 (GASKET, IN. MANIFOLD) $4.05
First off, take the intake box and tube/pipe off. Then remove all hoses, electrical plugs, clamps and components off the intake manifold.
Then begin removing the 5 bolts for the upper portion of the Intake Manifold and 2 bolts holding the EGR Valve.
Once off, begin cleaning all the intake ports, throttle body, IACV valve and EGR ports. Use the razor blade to scrap off old gaskets and build up around the mating surface. Use the tooth brush and q-tips with the brake cleaner/throttle cleaner to clean all of the gunk inside the intake mani. This part can take some time. Be carefull not drop anything down the ports, if you do use a needle nose plier to pick it out. Use the shop paper towels to wipe off excess gunk build up.
Use the wire to clean the EGR ports and use an air blower to blow the port out. Make sure you clean the EGR Valve as well, and the IACV Valve while everything is off.
Lastly, use the copper gasket spray to coat only the Intake Manifold gasket. Give it 3 flash coats on both sides before putting it on. By using the copper spray, I noticed it allowed a better seal and reduces the chance of air leaks/vacuum leaks. Once dried, install it. And install the EGR valve gasket. Install everything in reverse. You should be good afterwards. After doing this, I noticed the CEL went away completely.
Tools:
-3/8 rachet, air rachet if you have one
-3/8 extensions
-3/8 universal joint
-10mm,12mm,14mm sockets
-phillips screw driver, flat head
-needle nose pliers/adj. pliers
-razor blade
-shop paper towels
-tooth brush, q-tips, wire
-throttle body cleaner/brake cleaner
-copper gasket spray
Parts (OEM HONDA PARTS ONLY) prices may range from your area, cheaper online:
-18715-PB2-000 (GASKET, EGR VALVE) $4.67
-17115-PAA-A01 (GASKET, IN. MANIFOLD) $4.05
First off, take the intake box and tube/pipe off. Then remove all hoses, electrical plugs, clamps and components off the intake manifold.
Then begin removing the 5 bolts for the upper portion of the Intake Manifold and 2 bolts holding the EGR Valve.
Once off, begin cleaning all the intake ports, throttle body, IACV valve and EGR ports. Use the razor blade to scrap off old gaskets and build up around the mating surface. Use the tooth brush and q-tips with the brake cleaner/throttle cleaner to clean all of the gunk inside the intake mani. This part can take some time. Be carefull not drop anything down the ports, if you do use a needle nose plier to pick it out. Use the shop paper towels to wipe off excess gunk build up.
Use the wire to clean the EGR ports and use an air blower to blow the port out. Make sure you clean the EGR Valve as well, and the IACV Valve while everything is off.
Lastly, use the copper gasket spray to coat only the Intake Manifold gasket. Give it 3 flash coats on both sides before putting it on. By using the copper spray, I noticed it allowed a better seal and reduces the chance of air leaks/vacuum leaks. Once dried, install it. And install the EGR valve gasket. Install everything in reverse. You should be good afterwards. After doing this, I noticed the CEL went away completely.
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