Shovelhead smokin'

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Oct 25, 2014 | 10:45 AM

#11

marl

Thread Starter

Intermediate

Joined: Oct 2014

Posts: 26

Likes: 1

From: u.k.

BTW......regarding head gaskets, some can appear to fit perfectly but can actually move a few mm when tightening the head bolts. This can result in the oil drain hole being partially blocked. I have bought some head gaskets where the oil hole is clearly not as big as the drain hole in the top of the cylinder. If you are very careful, you can open them a bit with a small, round file. But you will no doubt bur over the soft aluminium which is in the middle of the gasket. Removing the 'burred' edges of the newly enlarged hole can be difficult. Don't know why some companies make the hole in the gasket too small in the first place.

Oct 25, 2014 | 01:51 PM

#12

Racepres

Seasoned HDF Member

Joined: Jul 2014

Posts: 8,603

Likes: 3,374

From: Cental, MI

Quote:

Originally Posted by marl

'74s don't have valve seals.They were only fitted to 1982-84 shovels as far as I know. '82-'84 models were also fitted with additional oil hosing from the tappet blocks to the base of the cylinders.

The additional plumbing at the Tappets is only on some [presumeably Califonia models]

Point is...No seal at all is still Not a Problem...No Smoking.