Thread: 1954 Royal Review 47160049

Originally Posted by Lotz-A-Landies

Don't leave a head in a molases soup too long as there are white metal plugs between cyl 2 and 3 that will disappear, then need to be replaced. This will also require the head to be surfaced.

I must be missing something here.
I cant find these plugs to which you refer.

Keith , The only white metal plugs i know of in a F head are the ones partly under the exhaust manifold at the front & back of the head. You can take them out & tap a 1/2" pipe thread in the head & screw a tapered thread pipe plug in . after fitting them you can grind them flat or grind some of the plug away to clear the exhaust manifold. I dont know of any other white metal plugs in the head. Wayne

The ones at each end of the exhaust manifold are in the block though.
I cant find any in the head.
I have got the block in the soup now, so see what happens.

Originally Posted by 1950landy

Keith , The only white metal plugs i know of in a F head are the ones partly under the exhaust manifold at the front & back of the head. ...

Thanks Wayne

It looks like I have to go back to working on S1 again, I soaked a S1 head about 8 years ago and seems had a mis recollection of losing the metal in the places indicated at the circles.

Just went and looked at the soaked head and yes Wayne you are correct about nothing between the middle cylinders.

Diana

I hope that molases wont eat the thin copper tube away that runs down the exhaust side of the block , the tube the small ports run off to cool the exhaust valve seats .Wayne

I will keep an eye on it. I put an ally inlet manifold in the dip for 4 days and nothing happened. It came out as it went in.

Molases only seems to eat white metals, but will eat the zinc out of sintered bronze bushes.

We sat a whole s1 block in molases for a month or so that was originally seized, when it came out of the soup the crank and con rods were sitting in mid air with the piston rings sitting in the bore but no pistons and no chrome on the bore.

Diana

Originally Posted by 1950landy

The rubber in the bush doesn't do the lathe tool much good . I can rember maching down series11 bushes for my narrow springs , burnt out about 6 parting tools & was using water to cool & lube. Going to ROAQ meeting see if i can find some P4 hub caps. Wayne

You should have used a knife blade once you parted the outer shell. But as I said the only time I would machine a bush down is to make spring bushes out of the long chassis bushes.

Particularly important for the SIIB as only the SIII front chassis bush is the correct OD for the SIIB springs. The closest option when you cant find SIIB spring bushes.