50Traveler Posted September 17, 2014 Share Posted September 17, 2014 I am still getting acquainted with my 1960 Adventurer. It joined my 1947 DeSoto coupe just a week and a half ago.I have a blowing air leak that shows up near where the valve cover meets the intake manifold in the center. It is not that hot but is noisy enough. Would an exhaust leak show up here? It seems to me that the exhaust manifold is over on the other side and below the valve cover.Next question. Is there a diagram anywhere the shows the routing of vacuum lines? One of them that comes out of the dash to the left of the master cylinder is plugged and not connected and it would be helpful to figure out where it goes so I can understand why it was disconnected.The car is a wonder with A/C, an incomplete AutoPilot, a partially working power seat, and scary brakes. A V-8 is quite a departure from my more familiar flathead sixes though and I want to do right by the car and not ignorantly chase symptoms.Thanks for any help,Justin Link to comment Share on other sites More sharing options...
JACK M Posted September 17, 2014 Share Posted September 17, 2014 You will get exhaust there. There is a crossover under the carburetor. I am thinking that these are all 'B engines or (identified by the distributor in the front) One of the easiest intakes to pull as you don't have water or distributor to deal with. Just undo the fuel, vacuum and throttle linkages then the manifold bolts. The valley pan is the gasket. (there are two widths of these over the years although in 60 there was only one, the narrower of the two) To change the gasket there are small bolts on both ends accessible after you pull the manifold. Usually this gasket/pan is supplied with a small tube of sealer.I am not a Desoto guy, but I don't think they put small blocks (distributor in the rear) in the Desotos.These engines are also famous for the valve covers leaking so if it were me I would take a close look for oil leaking onto the exhaust manifolds, the manifolds are very close to the valve covers and the gaskets tend to get crispy. Link to comment Share on other sites More sharing options...
50Traveler Posted September 17, 2014 Author Share Posted September 17, 2014 Thank you! Are you saying that this exhaust leak is an intake manifold gasket problem? That could make things much easier if I understand this correctly.Huge thanks!Justin Link to comment Share on other sites More sharing options...
JACK M Posted September 18, 2014 Share Posted September 18, 2014 Yes, that is what I am saying. You say that it is blowing air, if its hot it is probably exhaust. I cant think of anything else that would be under pressure where you describe.Should be an easy fix. Link to comment Share on other sites More sharing options...
50Traveler Posted September 21, 2014 Author Share Posted September 21, 2014 It would have been an easy fix but for the struggle to get the gasket and manifold under the A/C compressor brackets and one stripped bolt hole. All is back together now and today I'll fire it up and hope for the best.Thank you for your insight and experience. Once I had it apart I could see how the exhaust ran and it all made sense.Justin Link to comment Share on other sites More sharing options...
JACK M Posted September 21, 2014 Share Posted September 21, 2014 I should have mentioned that the AC cars were more difficult. Link to comment Share on other sites More sharing options...
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