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11-11-2024, 10:18 AM | #17 |
Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,362
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Re: Stink Ten Two. The second Blazer.
Now the weather has changed I became aware that the heater worked poorly and there was no defroster or vent output. After removing the heater controls and testing them with a hand vacuum pump I determined that the control vacuum switch worked. Further troubleshooting lead me to find the vacuum line from the engine was leaking. When I checked the line at the intake it appeared that it had been plugged with some glue. During the removal of the factory plastic vacuum line it snapped in two. Classic old GM vacuum line failure. Then while I was trying to figure out the way to fix that the line snapped off inside the grommet through the firewall. GRRRR!
After 30 minutes of trying to access the grommet from inside I gave up. There is no way to get at it without removing the heater air box and that meant removing the dash. I wasn't going to dive that deep now. So I found a hole in the firewall near the clutch pedal and ran a new hose from the intake to the switch in the heater control unit. With a good vacuum supply from the engine now the heater works better and I have a defroster too! Having a non-AC truck it has the lower output blower so airflow is less that the old blue Blazer. I will look into upgrading to an AC blower like I did on my Burban. More is better right? The only photo I remembered to take is of the grommet where the factory hose went through the firewall.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 Last edited by HO455; 11-11-2024 at 11:02 AM. |
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