hummer h1 themostat


cjlv
12-07-2003, 02:17 PM
I have a 1999 H1 Turbo Diesel 6.5L. I need to change the themostat. Does anyone know where I can find instructions or how to change the themostat?

Thank You

corsair-pilot
07-28-2009, 12:24 AM
H1 has 2 thermostats in the water outlet. Not to hard to replace. When its cool remove the upper hose from the water outlet,you will loose some coolant. remove the bolts, the lower one is the pain in the you know what. To install you set the thermostats in the crossover after you clean out the grouves. They will stay in position and very gently put the water outlet into place and hole with one hand while starting the upper bolts BY HAND and check to make sure the stats are in place.
put in the lower bolts and yes its a chore for the drives side lower one. Re connect hose and top off coolant.
Hope this helps.

Thomas Sams
03-31-2014, 04:13 AM
All Diesel engine's thermostat is able to repair, Why you want change it ?
You just need a good mechanic who knows better diesel engines. Here is you can get information about thermostat repairing which guide you everything of thermostat repairing. http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?pageId=0996b43f8025efe4

jhon hilpher
08-04-2014, 09:02 AM
remove the bolts, the lower one is the pain in the you know what. To install you set the thermostats in the crossover after you clean out the grouves.

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