TSB on water in plug holes

[4wheelfurry]

Can someone post the TSB on this common problem? Changed my plugs over the weekend @ 65000mi and they didn't need it yet but found water in #4 hole. This was my miss no doubt...

What are fixes for this issue?

[2002SLT]

Common problem? :confused:

Never heard of it...

[ssilicon]

I have heard of it somewhere in these forums. I have a LS2 (which isn't affected I believe) so I didn't book mark it or file it away. But I know I read it here somewhere.

[07TB]

I see this is posted in the 5.3l section but I didn't find any bulletins for water in the plug hole for V8's but there is one for the I6 engine. What year and engine do you have?

Mark

[ontimeman]

Gm Repair Is To Replace Rear Hood Seal And If Needed Plugs And Coil Module As Needed,,,,, The Seal Only Applies To Certain Years,,,,

[PROSPHOTO]

Even though we don't know what you're driving :bonk:

Please fill out all of the Profile Information for your vehicle (User CP->edit profile)

2004-2007 Buick Rainier

2002-2007 Chevrolet TrailBlazer

2002-2007 GMC Envoy

2002-2004 Oldsmobile Bravada

2005-2007 Saab 9-7X

with Vortec™ 4.2L Inline 6 Cylinder Engine (VIN S -- RPO LL8)


Some customers may comment that, after severe weather that includes large amounts of rain in a short period of time, the engine has a rough idle and/or flashing MIL/SES light. Upon further investigation, there may be the following DTC(s): P0300, P0301, P0302, P0303, P0304, P0305 or P0306.

This condition can be aggravated if the vehicle is parked nose down on an incline during this type of weather. The customer may also comment on repeat occurrences of this condition because water may be passing over the Air Intake Plenum (AIP).

Cause
The dripping rain water onto the engine cam cover will collect at the coil(s) and may seep past the coil(s) into the spark plug(s) well of the cylinder head and may affect the operation of the spark plug(s) and coil(s), causing the misfire(s).

Correction

To prevent a reoccurrence, the revised AIP seal will redirect the rain water flow away from the engine cam cover area.

Install AIP seal, P/N 25788476. The revised seal has a foam weatherstrip attached to the bottom. Refer to the above illustration (1). The foam weatherstrip faces the air inlet grille panel. Carefully stretch the revised AIP rubber seal over the plastic staked studs of the air inlet grille panel without damaging them.