Re: Seized Flavia Engine
Posted: 13 Nov 2020, 12:47
Dear Viiking,
I read carefully your last post, your definition of "butcher's method" is really appropriated...
The Lancia engines has been engineered in a very refined way, with state of art (for that time) materials and tolerances, the Flavia's engine halves was the biggest aluminium alloy die casting for automotive of that period, the wet liners has been done in special cast iron and are simply inserted (not pressed or fixed) into the crank case.
I had the same issue dismantling some 815 series engines in both carburetted and fuel injected version, in that cases you have to be patient and, as suggested by Miika, use penetrating oil to "lubricate" the liners and dissolve the deposit that prevent the exit from the block. You could also use diesel fluid, in worst case plunging the whole block and leaving it days or weeks into, in this way you will be able to extract smoothly the liners.
The above methods are time consuming but will ensure you to avoid any daage.
In normal situation, is really easy to extract the liners from the block, just pulling it with your hads, without any tool.
Regarding the image that you seen, showing a bolt used to keep the liners in position, this is used only during the assembly, then removed, when the engine is assembled the liners are kept in position by the cylinder heads only.
When you disassemble an engine is quite common to non see any presence of the old paper gasket between liners and block. Is right the suggestion by Miika to scrap the thick paper gasket that you find in the reproduced gasket set and make new ones using very thin oil-paper or semitransparent drawing paper, in this case pay attention to use pure cellulose semitransparent paper and you will reproduce it in the most similar way to the original. If the surfaces are in good condition no sealant is necessary.
To assemble, no need to heat the block or to cool down the liners, you have to simply insert the liner in the block gently pushing it with your hands.
In any case, to avoid any trouble, I suggest you to keep in mind all the procedure indicated in the workshop manual respecting also the torque indications.
Is possible to find both original (difficult) or reproduced liners, if you want to save some money you can also search for used liners to be re-bored but be careful to the condition. No issue for the pistons, you can find it original NOS, aftermarket NOS, reproduced with original specs or reproduced with modern technology, is only matter of money. No issue at all for the piston ring, for these I suggest you to choose good quality parts (see Goetze).
Kind regards
Giovanni
I read carefully your last post, your definition of "butcher's method" is really appropriated...
The Lancia engines has been engineered in a very refined way, with state of art (for that time) materials and tolerances, the Flavia's engine halves was the biggest aluminium alloy die casting for automotive of that period, the wet liners has been done in special cast iron and are simply inserted (not pressed or fixed) into the crank case.
I had the same issue dismantling some 815 series engines in both carburetted and fuel injected version, in that cases you have to be patient and, as suggested by Miika, use penetrating oil to "lubricate" the liners and dissolve the deposit that prevent the exit from the block. You could also use diesel fluid, in worst case plunging the whole block and leaving it days or weeks into, in this way you will be able to extract smoothly the liners.
The above methods are time consuming but will ensure you to avoid any daage.
In normal situation, is really easy to extract the liners from the block, just pulling it with your hads, without any tool.
Regarding the image that you seen, showing a bolt used to keep the liners in position, this is used only during the assembly, then removed, when the engine is assembled the liners are kept in position by the cylinder heads only.
When you disassemble an engine is quite common to non see any presence of the old paper gasket between liners and block. Is right the suggestion by Miika to scrap the thick paper gasket that you find in the reproduced gasket set and make new ones using very thin oil-paper or semitransparent drawing paper, in this case pay attention to use pure cellulose semitransparent paper and you will reproduce it in the most similar way to the original. If the surfaces are in good condition no sealant is necessary.
To assemble, no need to heat the block or to cool down the liners, you have to simply insert the liner in the block gently pushing it with your hands.
In any case, to avoid any trouble, I suggest you to keep in mind all the procedure indicated in the workshop manual respecting also the torque indications.
Is possible to find both original (difficult) or reproduced liners, if you want to save some money you can also search for used liners to be re-bored but be careful to the condition. No issue for the pistons, you can find it original NOS, aftermarket NOS, reproduced with original specs or reproduced with modern technology, is only matter of money. No issue at all for the piston ring, for these I suggest you to choose good quality parts (see Goetze).
Kind regards
Giovanni