23-09-2017, 01:55 AM
With the reduced Search I cannot now find on the old site, but someone described the tell tale pattern on bores
It is vital to distinguish cause and effect, and that the damage is due to internal rust and not accumulated water from a head gasket or crack. It is a coincidence two cylinders would rust through at the same time.
I dunno how relatively thin other parts of block are, otherwise liners a possibility although distinct doubts about robustness, esp if engine modified.
The effect of porous blocks variable. On other makes have encountered chronic overheating with few other symptoms.
Whether full of untreated water or lying about in humid conditions blocks seems to corrode similarly. Stored engines should have water entries blocked off and old blocks stored in a plastic bag.
Ensure the main bearings dosed with clean oil.
It is vital to distinguish cause and effect, and that the damage is due to internal rust and not accumulated water from a head gasket or crack. It is a coincidence two cylinders would rust through at the same time.
I dunno how relatively thin other parts of block are, otherwise liners a possibility although distinct doubts about robustness, esp if engine modified.
The effect of porous blocks variable. On other makes have encountered chronic overheating with few other symptoms.
Whether full of untreated water or lying about in humid conditions blocks seems to corrode similarly. Stored engines should have water entries blocked off and old blocks stored in a plastic bag.
Ensure the main bearings dosed with clean oil.