[ZLRob]

Originally Posted by travislambert

Personally, I was nervous about using an LS-based aluminum housings on an LT-engine. The geometry is quite a bit different and I've heard of folks having issues with their thermostats after installing them. I haven't seen it personally, but the guys at Katech have and they don't use the aluminum LS housings on LTs anymore. I've had multiple engines built by Katech. They explained the details of the LS-LT thermostat mismatch issue to me, but honestly I don't recall exactly what they said, and I don't want to misquote them.

If someone would make an aluminum LT thermostat housing, that could be a cleaner end result than the guard but more effort to install. The guard solves the problem and maintains the OEM thermostat. To me that's a win-win, but to each their own.

I don't see how geometry is an issue on the thermostats so I'd really like to hear what Katech has to say about that. I used an AC Delco factory GM 186* thermostat on initial install and it has been working just stellar ever since. I just made sure coolant was up to level, vehicle comes up to temperature proper temperature, and fans are working and everything just works.

If people have been having issues it most likely has been due to thermostat brand issues because I believe a lot of people use Motorad and similar knock off brands those have been known to be made with inferior components and be faulty right out of the box. All for the sake of trying to run a 160* or 170* temperature which is why I went factory Corvette temperature on mine from the LS7.