Ok, where to start. SE started overheating about a year or so ago (still L36 powered). So after replacing radiator, pump, t-stat, UIM/LIM, the works I gave up and just bought a new motor (L67). Well when I did the swap it was around winter so cooler weather. Figured the issue went with the motor. Well to my surprise she came rolling back around as soon as the weather temps started to rise. Bare in mind, I live in CA where it's not uncommon to see temps upward of 100*
So here's the situation. When Cruising on the freeway it usually stays around 210, until you start to climb, (and I mean the slightest of inclines) the temp will start to kick up, once it does there's no bringing it down. City driving, as you can imagine is worse. So I started from square one again, beginning with the cheapest first.
t-stat. Dropped to a 180 as it was still rolling on the stock 195 that came with the motor. No fix...
replace the LIM/SC gaskets. Well to my surprise, they had already been replaced and were in relatively good condition (still replaced of course), but still no fix.
Water pump. I removed the belt and spun the pulley and it was still very much ok, but figured **** it, it's under waranty. Popped in a new one, topped off the coolant and STILL no fix.
Hi-Lo fan switch. Even though I could clearly see the fans were on, I figured maybe having them on hi would possibly help. NOPE! It's like it was never even there as the temp still steadily rises. (by the way, both fans work)
My latest.. The radiator. Figured just maybe it's cause I was still running the stock OEM replacement GT/SE radiator. So I picked up a 1" core GTP one, this way I could also do a flush. Well I crossed my fingers and hoped for a fix but still no luck.
Headgaskets fine, no smoke out the tailpipe, no loss in coolant, I just don't know where to go from here. I'm gonna take it in this weekend and hope and pray it's cause there's air in the lines, but if anyone might have some insight on what you think it could be i'd greatly appreciate it. Also, sorry for the long ass post
