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Cyl Head Mods


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its been modded, as the plug side ridges ev gon awol

Note, unless its been shaved, it,ll ne down on CR as opposed to an OE,n

 

Only realistic way to check is t,burette the chambers to find oot

just hoo much CCs are needed t,fill them up

 

 

 

M

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Richard

 

Side-by-side comparison with a 219019 casting. This one is skimmed and measured at just over 9:1 (the crease in the combustion chamber touches the face approx 2/3 across the water way - red line). Shape looks pretty similar, though.

 

Paul

 

post-12218-0-73699300-1511727386_thumb.jpg

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Having a good look at that pic, like 400X zoom,

it looks like the margin es gon between the seats.

 

Compare area between seats on the 2 pics Paul bunged up

on his, ye can see heed matterial,

on your, it cannae be seen

 

And, cant see any evidence of an insert

Which means that valve had pocketed, and been cut back,

hence having to bung in a bigger valve

 

Has all chambers got same valves, and been cut the same

cutting ex valves too wide { Not too deep, 2 totally diff things, depth an width }

 

this could well lead to a burnt / cracked area between the 2,

as the seats are open, and ex gasses flow across the ..dip / cut oot bit, on overlap

 

a common affliction in my findings

 

M

Edited by GT6M
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Having a good look at that pic, like 400X zoom,

it looks like the margin es gon between the seats.

 

Compare area between seats on the 2 pics Paul bunged up

on his, ye can see heed matterial,

on your, it cannae be seen

 

And, cant see any evidence of an insert

Which means that valve had pocketed, and been cut back,

hence having to bung in a bigger valve

 

Has all chambers got same valves, and been cut the same

cutting ex valves too wide { Not too deep, 2 totally diff things, depth an width }

 

this could well lead to a burnt / cracked area between the 2,

as the seats are open, and ex gasses flow across the ..dip / cut oot bit, on overlap

 

a common affliction in my findings

 

M

 

They're all the same as per attached pic. I'd have to remove a set of valves to clarify your point, but I doubt there'll be an issue.

post-6267-0-38069000-1511882986_thumb.jpg

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