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| | | | Joined: Jan 2011 Posts: 306 'Bolter | | 'Bolter Joined: Jan 2011 Posts: 306 | i have a 66 half ton with a 250 in it.
when it gets warm it whistles.
i think it's the seam between manifolds.
but it almost seems to come from both sides of the engine.
anyone ever had this same issue?
thanks
rolf
1963 c10
| | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | Sounds like a vacuum leak. If you get the truck warmed up and idling take a propane torch and turn the gas on low. Go along the intake to head areas, carb base gasket, if you have a leak it will suck the propane into the engine and it will speed up. | | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | I've also heard the little one barrel Rochesters whistle when set just right. But like Don said, most likely a vacuum leak. | | | | | Joined: Jan 2011 Posts: 306 'Bolter | | 'Bolter Joined: Jan 2011 Posts: 306 | thanks i'll try the torch.
rolf
1963 c10
| | | | | Joined: Dec 2001 Posts: 1,248 'Bolter | | 'Bolter Joined: Dec 2001 Posts: 1,248 | Maybe it's just happy?? LOL John | | | | | Joined: Jun 2009 Posts: 1,596 'Bolter | | 'Bolter Joined: Jun 2009 Posts: 1,596 | Did you install a turbo and forget?  Sounds like a vacuum leak. A small water bottle to spray can work too, but it will make the engine stumble instead of speed up. Thanks for the propane tip, that's a good one! | | | | | Joined: Feb 2001 Posts: 1,094 'Bolter | | 'Bolter Joined: Feb 2001 Posts: 1,094 | It's been a long time since I had that problem, but if I remember, it had something to do with the mixture adjustment and the air cleaner being off.
Tommy
59 apache 1/2t
261 short stepside
| | | | | Joined: Jan 2011 Posts: 306 'Bolter | | 'Bolter Joined: Jan 2011 Posts: 306 | i'll try any and all suggestions
thanks guys
rolf
1963 c10
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