the #4 spark tip , after running engine is also a good clue.
for sure, if oil , fuel or green antifreeze coated tip.
one poor guy here we worked his engine over and over doing tests. (him in Argentina, sad story there)
but compression was insanely high.
caused by milling head, 10 times DEEP or not de-warping (oven) treating it first and then milling the SNARF out of it.
it pinged like mad, (gross detonation) endless, (NOX too) (engine sounds like bucket for rocks, shook)
and the only cure was (retarding timing grossly) (band aid) (or 2 head gaskets at same time)
no heads spare in that country. zero. (nor shops that know what to do, but too late now...)
for sure, if oil , fuel or green antifreeze coated tip.
one poor guy here we worked his engine over and over doing tests. (him in Argentina, sad story there)
but compression was insanely high.
caused by milling head, 10 times DEEP or not de-warping (oven) treating it first and then milling the SNARF out of it.
it pinged like mad, (gross detonation) endless, (NOX too) (engine sounds like bucket for rocks, shook)
and the only cure was (retarding timing grossly) (band aid) (or 2 head gaskets at same time)
no heads spare in that country. zero. (nor shops that know what to do, but too late now...)
http://www.fixkick.com