mtb_tuli
Active Member
Had the same problem recently. Installed my manifold with special engine silicone sealant, but had a leak at one conection for the coolant. So, everything off again, but no way first, the silicone holds it firmly on the heads. Started with a knife like you did, there´s not other chance. Then used a "spatula blade" and carefully hammered it between with a rubber mallet port by port.
Finally hammering carefully with rubber mallet and a piece of wood until you see a wider gap, then using again spatula blade and so on.....
It cost me 2 hours, but you cannot use a screwdriver or anything like this, it´s all aluminium. When the valley gasket is off, you have to clean the contact surfaces of the heads and manifold, so cover the valley carefully with an old rag. That will be another fine work. For refitting, I have used now a compound valley gasket and blue Hylomar for the coolant ports only. Before you apply any sealant, make a "fitting" test without it.
Finally hammering carefully with rubber mallet and a piece of wood until you see a wider gap, then using again spatula blade and so on.....
It cost me 2 hours, but you cannot use a screwdriver or anything like this, it´s all aluminium. When the valley gasket is off, you have to clean the contact surfaces of the heads and manifold, so cover the valley carefully with an old rag. That will be another fine work. For refitting, I have used now a compound valley gasket and blue Hylomar for the coolant ports only. Before you apply any sealant, make a "fitting" test without it.