ISX CM2350 trouble maintaining temp

[Moose]

(01-21-2018 )smorgan87 Wrote:  When u changed the tstat did u replace the brass press in seal and all gasket/orings? Check all mating surfaces?

It got a new OEM t-stat, gasket and 186780 seal. I always clean with Roloc pad or appropriate for the material.

(01-21-2018 )Chamberpains Wrote:  I see you stated that you lock your fan in. Just a question. But could your fan be running too much and drawing too much heatout? Why not let it go through its normal fan Cycles

This was used the day of the repair only to try and create heat while finishing up the refill process. It was mainly to say it took "this" much to force it to get up to temp. Normally, I don't lock the fan in. This truck has the two-speed viscous/air type. I've never had a need to.