shooting coolant out of reservoir/defunct heater

tsupranami · 02-15-2009, 06:55 AM

Engine pulled. Check.

Was it a complete rebuild? Did you or the shop pull the crank & pistons? Are the new pistons stock? Oversized? Same compression ratio?

Was the block deck resurfaced? If so, how much was taken off? Was the head milled also? How much was taken off of it?

Does FelPro make HG's in different thicknesses?

No heat. Check.

No heat = no hot water in heater core *and/or* airflow blocked by debris in ventilation system.

No hot water in heater core = no water flow(control valve(s) not operating) *and/or* no water (air in system.)

No water flow = control valve(s) not operating(firewall hvac and/or thermostat) *and/or* heater control unit not operating (dash unit and/or vacuum actuator)

No water in heater core = incomplete fill and bleed *and/or* leak in cooling system

Incomplete fill and bleed - Did someone forget to have the heater on (heater core valve open) when the system was filled and bled?

The heater hose into the control valve at the back of the engine is higher than the cap. Trapped air here causes lots of problems on the 7M's. Sounds like you're aware of that, though.

Leak in cooling system = internal *and/or* external

No external leaks and all other systems are good (thermostat, radiator, cap, water pump, no collapsed hoses, etc.) = engine is overheating (abnormal timing / fueling) *and/or* there is an internal leak.

Internal leak = water in oil/oil in water *and/or* water in cylinder(s)

Water in oil/oil in water = Milkshake of Death

Water in cylinders = air in cooling system *and/or* cracked head (<1%), cracked block (<0.5%), BHG (98.5%).

Clear as Mud? Check. lol!

Hope that helps. Good luck! Keep us posted.

02-15-2009, 06:55 AM	#9
tsupranami Intake Join Date: Jun 2008 Location: Washington Posts: 32	Engine pulled. Check. Was it a complete rebuild? Did you or the shop pull the crank & pistons? Are the new pistons stock? Oversized? Same compression ratio? Was the block deck resurfaced? If so, how much was taken off? Was the head milled also? How much was taken off of it? Does FelPro make HG's in different thicknesses? No heat. Check. No heat = no hot water in heater core and/or airflow blocked by debris in ventilation system. No hot water in heater core = no water flow(control valve(s) not operating) and/or no water (air in system.) No water flow = control valve(s) not operating(firewall hvac and/or thermostat) and/or heater control unit not operating (dash unit and/or vacuum actuator) No water in heater core = incomplete fill and bleed and/or leak in cooling system Incomplete fill and bleed - Did someone forget to have the heater on (heater core valve open) when the system was filled and bled? The heater hose into the control valve at the back of the engine is higher than the cap. Trapped air here causes lots of problems on the 7M's. Sounds like you're aware of that, though. Leak in cooling system = internal and/or external No external leaks and all other systems are good (thermostat, radiator, cap, water pump, no collapsed hoses, etc.) = engine is overheating (abnormal timing / fueling) and/or there is an internal leak. Internal leak = water in oil/oil in water and/or water in cylinder(s) Water in oil/oil in water = Milkshake of Death Water in cylinders = air in cooling system and/or cracked head (<1%), cracked block (<0.5%), BHG (98.5%). Clear as Mud? Check. lol! Hope that helps. Good luck! Keep us posted. __________________ 89 Turbo Targa 5spd, 18x10 w/275/35/18, 18x9 w/245/40/18, Brembo CD rotors, Hawk pads, SS lines, HKS coilovers, ST sways, 1 pc. AL DS, V3 shifter, RPSmax PP w/HPF ferramic disk, custom crank, Eagle Rods, JE pistons, Ferrea valves, BC 264 cams, Fidanza cam gears, Walbro FP, AFPR, RC660 inj., Blitz SUS, Lexus AFM, SP 47trim CT26, HKS SSQ BOV, 2.5" AL IC pipes/FMIC, Lipp turbo elbow, RT DP, Greddy SP catback, HKS FCD, AEM Uego WB, Apex'i SAFC, Apex'i AVCR, EGT, Fluidyne AL rad, Flexalite fans.