Re: 1948 Packard Super Eight Misfire and lifter tacket

Posted by Ross On 2022/8/26 20:56:13

For #1, see if you can get a compression test done and report back. Surely a cylinder or two are not firing but that could be spark, mixture, a vacuum leak, or bad compression. Gotta sort them out one at a time.

#2, if it is still a super 8 engine it might have hydraulic lifters which can get noisy in their old age. Or it might have solid lifters that simply need adjusting. You'll need to take off the side plates and have a look.

#3 the overfilling trick is only for the 55-56 V8 engines. If your oil is overfilled and smells like gas then it is likely the fuel pump has failed and is leaking into the oil. That will thin the oil and will increase the likelyhood of #2. Get that stuff out of there and put in some 30 weight. You are then going to need a fuel pump rebuild, or bypass it and use an electric pump for a while till you get thing sorted out.