Quote:
Originally Posted by rx3
What's interesting about this issue, is the fact that many seals apparently did survive when people doubled the output by going FI (which is only possible with more pressure and with it temperature in the combustion chamber).
Maybe it's simply a manufacturing clearance/fitting issue (the tolerances given to the manufacturer(s) of the seals are not tight enough or the dimensions from seal to seal vary too much in the manufacturing process).
Some seals simply have a looser fitting and those seals are now showing problems, since they can transmit less heat and can move more easily.
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I really hope it isn't a head machining tolerance issue. If it is, the cost to Toyota/Subaru to replace cylinder heads would be huge and they would doubtfully ever acknowledge or deal with the issue proactively. Rather they would just keep changing o-rings till the warranty runs out.
I am hoping that the FI guys aren't seeing immediate issues because they are already very cooling/temperature conscience, meaning most have an oil cooler which could be helping the coil packs survive.
But the silence from Toyota and Subaru on the issue domestically is still down right depressing, like it isn't even on their radar and this issue is so much more serious than the little idle/cel issue from last year.