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gonzo1949 · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

Yes I did the @m*m^2 on it

Waterloo · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

Check the compressor, if it has a wild tune on it, I would say more than likely it is the head gasket or head. Do you have a pyro and boost gauge on her? I would look at returning her to stock and MM her after fixing the head...

Waterloo · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

Does it still have the OEM VV turbo on her, or was that replaced too?

gonzo1949 · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

No I did the 485 @m*m^2. Boost and pyro installed. Boost never goes over 38 and pyro sits at 300.goes up too about 500 on a hard pull

gonzo1949 · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

Yes oem turbo and new actuator

Waterloo · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

I would fix the head, remove all of the plating and get her as close to stock as possible.

Waterloo · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

(03-24-2016 )gonzo1949 Wrote: No I did the 485 @m*m^2. Boost and pyro installed. Boost never goes over 38 and pyro sits at 300.goes up too about 500 on a hard pull

Sounds like mine, same tune, 485 hp, same readings.

gonzo1949 · 03-24-2016, **(Subject: isx cm871 coolant pressurized )**

Yea she runs great. No issues til now. Gonna wrench on her this weekend.

03-24-2016, **(Subject: isx cm871 coolant pressurized )**

just a fair warning for guys running around with the caps loose. obviously you gotta do what you can to get it moving BUT

Running a 0 pressure system on conventional coolant, and LL coolant can cause localized hotspots on the liners and cause severe damage. the truck needs that pressure to maintain a high boiling point and keep the liners from flashing off coolant and causing overheat on the liners. just a heads up.