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Old August 29th, 2016, 03:46 AM
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GMCDAC GMCDAC is offline
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Join Date: Jan 2013
Location: Green Valley, east of Rapid City,SD
Truck: I have 4 GMCs, none with a V-6 - YET! Have had 2 in the family.
Age: 67
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Default Re: Air cleaner "Auto Therm" unit

Quote:
Originally Posted by bigblockv6 View Post
Yes, 1968 and 1969 305E and 351E V6 1/2 ton trucks did have the Auto Therm unit, even the carburetors for those particular models were ported for that as well.
Quote:
Originally Posted by bigblockv6 View Post
It's all about bending that tab, just use a flat blat screwdriver to bend it. When you replace it use a vise grip or C clamp as long as one will fit in to hold down the unit so you can bend the tab back to it's proper position.
Ha ok that's what I was afraid of----I better go to Harbor Freight and see if I can find an oddball long-armed clamp of some sort to bend that darn tab back into position. The unit still works with a vacuum gun on my '72 GMC and it doesn't need it due to headers but even though I have owned that truck since 1979 someone had drilled a bunch of holes in the filter can part before we bought it. I'm hoping to keep the '70 air cleaner assembly on the '70. I want that valve to work though!

DAC
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Doug Crawford
Rapid City, SD

1970 GMC K5 Jimmy Mom drove 30 years
1972 GMC C2500 owned since 1979
1955 GMC 100 driver-project
2006 GMC Yukon Denali---wife's truck

Hope to have a '60 GMC Suburban again someday
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