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I'm trying to find an exhaust leak and I've stumbled upon discussions about seafoam cleaning engines and producing lots of smoke. I figured I can kill 2 birds with one stone. Popular choice seems to be 1/3 fuel tank, 1/3 crankcase, and 1/3 can into intake. Is this safe to try in 66 with stock 289? It seems most threads I read were dealing with fuel injected vehicles. Which is the best vacuum hose to use? And finally is it necessary to change oil afterwards? Thanks in advance.
 

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+1. us with fuel injected have to use one of the vaccum ports but carbed, just pour it in. if it starts to stumble, just play with the throttle to keep it running.
 

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A very small amount of transmission sucked in thru a vacuum port into the intake will do the same thing and show where the exhaust leak is.

VERY SMALL amount or you will have to apply for a business license for "Mosquito sprayer".... :laugh:

This is how we did it when I worked as a mechanic at a Ford dealership.





Richard
Tech Support
Tremec TKO, T45 & T56 Transmission Systems
 
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