Injector Cup Sealant, LB7 Duramax | 2001-2004

Injector Cup Sealant, LB7 Duramax | 2001-2004

This red sealant is used when installing injector cups on the 6.6L Duramax LB7. A small amount goes at the bottom of each injector cup to make sure it seals properly in the cylinder head. On the LB7 the injector cups pass through the coolant jacket, so a properly sealed cup helps keep coolant out of the combustion chamber and away from the injector. Use it with new cup O-rings any time the injector cups are replaced.

Key Features

• Red sealant for LB7 injector cup installation
• Applied at the bottom of each injector cup
• A small amount per cup
• Also included in our LB7 injector install kits

Benefits

When an injector cup is replaced, sealing the bottom of the cup is what keeps coolant out of the cylinder. Having the right sealant on hand means the cups go in sealed the first time, so you don't chase coolant loss after the job. Commonly used with: Injector Cup O-ring Kit, Duramax | 2001 - 2004, Injector Seal Kit, 12 Piece, LB7 Duramax | 2001-2004.

Frequently Asked Questions

Where does the sealant go?
Apply a small amount at the bottom of each injector cup before installing it in the cylinder head.

Do I need new cup O-rings too?
Yes. Replace the cup O-rings any time a cup is removed. Our Injector Cup O-ring Kit has all 16 for one engine, or you can buy them in a 2 pack.

Is there a kit with everything for an LB7 injector job?
Yes. The Deluxe Fuel Injector Install Kit - No Injectors | 2001 - 2004 and the Basic Fuel Injector Install Kit, Duramax - No Injectors | 2001 - 2004 both include this sealant.

Will I need a removal tool?
A stuck LB7 injector is much easier to remove with our Merchant Automotive Fuel Injector Removal Tool Kit | 2001 - 2004.

Fitment

For injector cup installation on 2001-2004 Chevrolet Silverado and GMC Sierra 2500HD and 3500 with the 6.6L Duramax LB7.

What's Included

• Red injector cup sealant

For warranty information, see our Warranty Policy.