If the engine coolant reservoir is a little bit below the full line, when the engine's cold, should I top it off to the "B" line, or do you do that only after draining and refilling?
Only as part of the refilling process after draining. It should end up at FULL after it has traded places with the air in the system.
How many miles? Egr circuit been cleaned? Keep an eye on the coolant to make sure the head gasket isn’t blown
90k. And there is no way in hell that I would even attempt to pull that EGR valve out and all the work involved doing it! Especially if it's not showing any symptoms of being clogged or dirty.
Budget for a head gasket repair around 150k then, and another shortly thereafter, if the EGR is not cleaned at that time.
So, with only 90k, I would hazard a guess that I shouldn't have to deal with the EGR/manifold cleaning for at least another 30-40k, which would still put me 20-30k under that 150k threshold. And since my annual mileage is only around 5k, that gives me loads of time to put it off.
Also, what about first just checking the EGR pipe, which is relatively easy to remove, and if that's clogged, it would be an indication that the whole EGR valve and manifold is likely clogged as well? And if the pipe is clean, save just being little dirty, would it then be likely that further cleaning wouldn't be necessary at that point?
