How to rebuild automotive carburetors
m (→Holley squarebore carb: add link; minor clean up) |
(Add image; minor cleanup) |
||
| Line 63: | Line 63: | ||
<br style="clear:both"/> | <br style="clear:both"/> | ||
| − | [[File:Oring holley sec.jpg|thumb|350px|Arrow indicates cork O-ring that seals the vacuum chamber to the main carb body]] | + | [[File:Oring holley sec.jpg|thumb|left|350px|Arrow indicates cork O-ring that seals the vacuum chamber to the main carb body]] |
Use a fresh cork O-ring to seal the secondary vacuum chamber assembly to the carb body. Using a light smear of Hylomar on the cork gasket helps it to seal and stay pliable. A small rubber O-ring may be used instead of the cork gasket to seal a Holley secondary chamber. If you try this, be sure the O-ring is sealing, w/o being ''too'' thick. | Use a fresh cork O-ring to seal the secondary vacuum chamber assembly to the carb body. Using a light smear of Hylomar on the cork gasket helps it to seal and stay pliable. A small rubber O-ring may be used instead of the cork gasket to seal a Holley secondary chamber. If you try this, be sure the O-ring is sealing, w/o being ''too'' thick. | ||
<br style="clear:both"/> | <br style="clear:both"/> | ||
| − | Be sure the vacuum chamber is assembled correctly. The diaphragm can | + | [[File:Holley sec checkball.jpg|thumb|450px|Secondary vacuum chamber check ball]] |
| − | + | Be sure the vacuum chamber is assembled correctly. The diaphragm can be torn or perforated; if that happens there will be no or very slow to activate with incomplete opening of the secondaries. Also, the check ball can get left out or can stick, or the check ball seat can be rough, allowing the secondaries to activate too easily. So be sure the check ball is present and the seat is well formed. | |
| − | + | ||
| + | The seat can be re-formed by using an old check ball and a small punch. Drop the check ball into the check ball passage, then with the vacuum chamber solidly supported, lightly tap the old check ball with the punch and a small hammer. This re-forms the seat. | ||
| + | <br style="clear:both"/> | ||
'''NOTE:''' There are small grooves in the vacuum chamber check ball seat. This is normal, so do not try to use this method to remove the grooves. They need to be there to allow the secondaries to work correctly. | '''NOTE:''' There are small grooves in the vacuum chamber check ball seat. This is normal, so do not try to use this method to remove the grooves. They need to be there to allow the secondaries to work correctly. | ||
Your Privacy Choices