![]() |
![]() |
|
GMC V6 and V12 Engines Engine repair and rebuilding |
![]() |
|
Thread Tools |
#1
|
![]()
Did any of the later V-6 GMC's use the Auto Therm valve on the air cleaner snout? Although not on a V-6, I need to replace one and since a lot of folks on this forum tend to lean toward restoration, I thought maybe someone here has done it without bending the heck out of the air cleaner snout! I know the unit can be bought at a decent price but I sure can't find how people replace them.
If this is too far from the purpose of this forum please delete. Thanks, DAC
__________________
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 |
#2
|
|||
|
|||
![]()
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.
![]() |
#3
|
|
![]() Quote:
Thanks---DAC
__________________
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 |
#4
|
|||
|
|||
![]()
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.
![]() |
#5
|
||
![]() Quote:
Quote:
DAC
__________________
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 |
#6
|
||||
|
||||
![]()
Be sure to post pictures of the finished product and maybe even some of how you did it!
![]()
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#7
|
|
![]() Quote:
I had to go into town for a roll of welding wire so I stopped at Tractor Supply since it was on the way for a long reach clamp. Much closer than Harbor Freight. I got the flat bill and the long reach locking pliers at TSC (pic1) for $9.99 in a combo deal so I wouldn't be out much if it didn't work. Pic 2-7 show how I had to cut the clamp up to fit into the air cleaner snout and get to the position to press on the tab for installation. Pic 8 is looking up the snout to where the clamp has to reach in pic 9. Pic 10 is bending up the tab and bracket to remove the good one. Please pay no attention to the engines in the pics-----
__________________
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 Last edited by GMCDAC; August 30th, 2016 at 02:58 AM. |
#8
|
![]()
Four more pics. I had to bend the retainer quite a ways to get the good one out-pic1.
The good one and the bad one-pic2. Pic 3 and 4 show the stroke of the diaphragm from closed to open. That's where I'm at right now. I will try to get the swap done after work tomorrow. I hope this may help anyone that wants to do this repair on their later V-6 engines. DAC
__________________
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 |
#9
|
||||
|
||||
![]()
Thanks for the pictures! Wanting those for future reference for anyone who may have the same issue.
![]()
__________________
"Excuse the rust I use my truck" 1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust. To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. 1964 Chevy C20 292/SM420 1966 Chevy C10 292 hotrod 6/TKO600 My youtube channel aka Military Chevy: To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts. |
#10
|
![]()
I got the good one swapped last night. The retainer kinked a bit but I slid that thin knife blade under it and tapped on it with a plastic hammer to work that out. It was much easier to do the clamping with it secured to the engine. The clamp I built would not hit the tab right until I pulled vacuum on the valve, closing it. Then the tab pressed into shape easily.
DAC
__________________
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 |
![]() |
Bookmarks |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
1964 GMC "crustine" semi-build. | TJ's GMC | Builds and Journals | 224 | December 3rd, 2021 07:39 AM |
Fender splash guards called "closing panels" | Leeforbes | 1960-1966 GMC Marketplace | 1 | January 24th, 2015 04:19 PM |
GMC 2 ton 6cyl "Toro-Flow" Diesel. No title. | Archiver | Previous Forum Posts | 4 | July 21st, 2011 03:03 AM |
"E", "H", and "J" Cab models | Archiver | Previous Forum Posts | 2 | May 20th, 2011 08:04 AM |
Clutch alignment tool or "pilot" shaft | Archiver | Previous Forum Posts | 4 | February 16th, 2011 01:07 PM |