Here is the first page of 3, i can email you the other 2 if your car isn't under the 8yr/80K warranty. It does involve drilling the intake manifold.
2000 Honda Accord EX Coupe V6-3.OL
Vehicle: All Technical Service Bulletins
Recall - DTC P0401 EGR Flow/EGR Port Clogging
99-085
October 26, 2001
* Applies to:
1998-00 Accord V6 - ALL,
2001 Accord V6 - 4-door from VIN I HGCG I ... I AOOOOO I thru I HGC(I I ... IA058564 2-door from VIN I I-IGCG2... I AOOOOO I thru I HGCG2... IA023388
Updated information is shown by black bars and asterisks.
Accord Warranty Extension: EGR Port Clogging
(Supersedes 99-085, Product Update Campaign: PCV Hose Routing, dated March 21, 2000)
BACKGROUND
In some areas of the (U.S., certain basic chemical properties of gasoline (regardless of brand) may cause the intake manifold EGR port to clog or the EGR valve to tail. If this happens, the MIL comes on with a DTC P0401 (insufficient EGR flow) or P 1491 (insufficient EGR lift) stored.
* WARRANTY EXTENSION INFORMATION
This warranty extension cancels the PCV hose routing Product Update Campaign. You should no longer install the PCV hose routing kit.
American Honda is extending the warranty on EGR system problems in the affected vehicles to 8 years or 80,000 miles, whichever comes first. To be eligible for coverage under this extended warranty, the MIL, must be on with one of the above DTCs stored. Install the EGR pipe kit, and file a claim using the information in this service bulletin.
CUSTOMER NOTIFICATION
1998-99 vehicles - Owners of vehicles that were subject to the PUD will be mailed a letter explaining that the PUD has been cancelled, and detailing the 8 year, 80,000 mile warranty extension covering EGR system clogging.
1999-01 vehicles - The original PUD applied to V6 Accords through the first part of the 1999 model year. This warranty extension adds the remainder of the 1999 model year, all of 2000, and part of the 2001 model year. Owners of vehicles that were not involved in the original PUD will be mailed a letter detailing the 8 year, 80,000 mile warranty extension covering EGR system clogging.
Examples of the customer notifications are at the end of this service bulletin.
CORRECTIVE ACTION
Clean the EGR port, and install the EGR pipe kit.
PARTS INFORMATION
EGR Pipe Kit: P/N 06175-P8C-AOO, H/C 6912125
TOOL. INFORMATION
EGR Pipe Installation Kit: T/N 07ZAD-P8AAOOO
Kit contents:
EGR pipe installation tool T/N07ZAD-P8AA100
Drill Bit T/N 07ZAH-P8AA100
WARRANTY CLAIM INFORMATION
In warranty:
The normal warranty applies
OUT of warranty