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How-To Sea Foam

Posted by: admin  /  Category: Audi, Engine
DIY: B5 A4 1.8T – How-To Sea Foam

1. Warm up the engine by taking a small drive or letting idle for 10 minutes.

2. With car running, open hood and locate the two vacuum lines leading to the intake manifold.

B5 Audi A4 Intake Manifold Vacuum Line locations

3. Take container of Sea Foam and pour 1/2 the bottle into a empty bowl or bottle. I used a dry and empty water bottle. Now you will not be needing the sea foam container any more.

4. Cut a strip of vacume line or whatever you may wish to use.

5. Attatch to the front intake bung.

B5 Audi A4 Front Intake Vacuum Line Bung

6. Lean vacuum line into bottle, but do NOT submerge it in the sea foam.

B5 Audi A4 Seafoam- Intake Manifold vacuum line into bottle of Seafoam

7. With hand on the throttle body, or someone in the driver seat, raise RPM’s to 2500rpm and hold.

8. With engine at 2500 rpm tilt the bottle of liquid and VERY slowly let the end of the vacuum line touch the sea foam. If the engine begins to choke you are doing it too fast and need to stop so the engine can stabilize.

9. Continue this until 1/2 the liquid in the bottle is used then let the engine go back to idle.

10. Remove the vacuum line from the bottle but DO NOT shut of the engine.

11. Reattach the vacuum line to the front intake bung.

12. Locate the rear intake bung that leads to the FPR (Fuel Pressure Regulator).

B5 Audi A4 Intake Manifold Vacuum Line to Fuel Pressure Regulator (FPR) bung location

13. I made a t-fitting to use in this section.

B5 Audi A4 T-Fitting for Seafoam

14. replace the vacuum line section with the t-fitting.

B5 Audi A4 T-Fitting connected to Fuel Pressure Regulator (FPR) for Sea Foam

15. Run the vacuum line into the bottle with the remaining Sea foam.

B5 Audi A4 Intake Manifold Vacuum Line to Fuel Pressure Regulator Sea Foam

Repeat steps 7 through 10
7. With hand on the throttle body, or someone in the driver seat, raise RPM’s to 2500rpm and hold.

8. With engine at 2500 rpm tilt the bottle of liquid and VERY slowly let the end of the vacuum line touch the sea foam. If the engine begins to choke you are doing it too fast and need to stop so the engine can stabilize.

9. Continue this until 1/2 the liquid in the bottle is used then let the engine go back to idle.

10. Remove the vacuum line from the bottle but DO NOT shut of the engine.

16. Reattach original vacuum line to the top intake bung and FPR

B5 Audi A4 Fuel Pressure Regulator (FPR) to Intake Manifold Vacuum Line Location
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Turn off the vehicle and let it sit for 10 minutes.
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17. Start vehicle and watch the smoke ploom out the exhaust… there will be a lot.

After 5 minutes:

B5 Audi A4 Sea Foam Smoke from Rear Exhaust

18. Let sit for 15 minutes or until very little if any smoke is still exiting out the exhaust.

19. Go for a little drive allowing the RPM’s to reach 6000 rpm. Smoke will continue to exit the exhaust for ~2-5 minutes but will eventually stop.

20. You are now done and enjoy your car.

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