Switching Super Major Heads

The DNN4 head doesn't have the compression release lever on it as does the FL which has been all redone. Will I run into gasket trouble with this switch?

John S.

The FL head had a modified intake port and the injector nozils were changed. It should be fine on your 1960 Super Major, but the service leters I have state you have to use the later nozil. Having said that, I reconditioned the nozils in my 1962 Super last November and the later type nozil is the only one available. I am at work and I don't have my books with me, but I think the early nozils were NL121 and the later ones NL141. I will check and confirm Monday. Brian may give you the answer before then.

The head gasket is dependent on the sleeves fitted. Around late 1961 the blocks were changed, the later block having a seal at the top of the sleeve as well as the botom. Th early engines did not have the raised ridge around the sleeve like the later ones. This ridge caused the gasket change. All replacment sleeves have the same ridge. Use the gasket to suit your sleeves.

Regards

Steven B

Also I happen to have this FL head left over from another tractor and it was just all redone at a cost of $400.

I'll probably leave the head alone and install a block heater for the winter. I wonder why the decompressors were installed on some tractors and not others.

john

Steven