THERE ARE TWO 2 THERMATIC VACUUM SWITCHING ...

  • Tiny
  • Anonymous
  • 1977 CHEVROLET EL CAMINO
  • 185,000 MILES

There are two (2) thermatic vacuum switching valves in the water jacket at front of the intake manifold. How do I differentiate between the two (2), also from what to what for what purpose?

Wednesday, March 20th, 2013 AT 5:02 PM

1 Reply

  • Tiny
  • Hmac300
  • EXPERT
  • 45,647 POSTS

Here is for a 350 as you didn't state engine size a 305 will besimilar see pic. If anything different then get back to me.

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Wednesday, March 20th, 2013 AT 5:09 PM

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