Re: reffiting liners

From: Erik
email: e.drooy@hccnet.nl
Date: 08 Apr 2006
Time: 13:32

Message

Hi Guy's, Im in the process of building a new engine for one of my cars (for quite a couple of years now). One of the main chalanges for this engine has been to definitely get rid of the headgasket thing. Here's what Ive come up with together with a good friend of mine. He has an engine rebuilding shop and works for the big Historic Racing companies all over the world. We found the tolerances of the Lancia parts and the machining in the engine to be lousy to say the least. Differences in height of the lines, differences in the depth of the seats of the liners. On one side we found one line to be above the block by 0.15 mm, where the one sitting next to it was 0.2 below the block. What we did to my engine is the following: The block(?) both sides was flattened just like you do with the heads. The lines have all been made the same height. The depth of the liner bases have all been made the same. The liners will be placed on the block without any gaskets. Bare metal, with a bit of Hylomar. Hylomar is a Poklyurethane goody that never fully hardens and is able to fill very thin gaps. If you're wondering now; this is the way forinstance the Rolls Royce V8 was build amoung many other engines. All four liners are made to stick out .15 mm above the block, which is a good measure when you have the thick headgaskets. It is impotant to have at least the two adjacent liners equaly sticking out. The liners themselves have a second groove on the inside of the existing one. There will be a metal wire in it that will rest on the metal ring in the headgasket. This appraoch is very common and believed to be the best remedy against blown headgaskets. The main reason for this thorough approach has been a stumach full of pain of all the headgaskest that I changes. In the end its always been clear to me that once you have a gasket problem you need to get the liner thing done, or you will be doing the same head again, depending on the amount of driving, but for me always within a couple of month. I will make some pictures of the stuff, Theo, can I send them to you so you can put them on? Cheers, Erik