Quote:
Originally Posted by funola
That "clean block" photo looks like someone cleaned just the area where the engine casting numbers are so it's legible while everything else around it is black and gunky.
The issue here is not corroded bolts, it's those 6 bolts that some how came loose, backed out and eventually sheared off. If those bolts did not come loose, you would not be having this problem.
How did they come loose? I can think of a few reasons:
1. From the factory. Maybe the torque-ing of those bolts was done on a Friday afternoon and a lot of beer was consumed?
2. Someone R&R those 6 bolts and did not replace with new bolts, did not torque them to spec, and did not use Loctite.
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Think what you want, I'm not going to waste time trying to convince you of the reality of how clean the engine block is.
The reality is that this does seem to be a relatively systematic problem, in at if even a few people have encountered it, it is something that has been observed to happen. Whether it's a slip up in manufacturing, a matter of the slightly more rough idle of a 240, or what is something we may never know.
The use of loctite is probably the big thing here, and it's probably prudent for the bolt torque levels to be verified on these cars, if not removed and retorqued once coated with loctite.
It's as prudent as any other preventive mod that we do on these cars.