ERG and EGR cooler question

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In that case peak temperature and pressure in the cylinders happens during highest demand, when EGR is cut off. That seems to call into question the assumption that insufficient EGR causes the head gasket failures.

Does the abrupt angle in the "operating line" at about 3600rpm correspond with EGR starting to taper off?

 

I found that a 6mm socket works if you don’t have the E8 torch socket. I tried it before I went and bought on and it worked fine. A palm ratchet is handy for those studs.

 

Does it? B/c an unrestricted EGR will still come in to help cool the engine at some point, while a clogged one will just let it cook until it cools on its own. So I think the assumption is still valid. I wish driving style could be accounted for in the data. Judging the EGR's flow in relation to how an engine is pushed, it seems to me that if you drive with a constant lead foot then you're working the engine without much EGR coming in. If you drive in a way where you coast often and just tap the gas enough to maintain speed then the engine is getting a consistent healthy dose of EGR (until clogged). But I mean, that's just my interpretation of the data I've seen here.