what is the 7 & 8 cylinder cooling fix for 4.6 heads
My 96 GT blew a head gasket recently and since I'll be doing a PI upgrade soon I keep reading about a cooling fix for the 7 & 8 cylinders; could someone enlighten me please on what's this for? any help would be appreciated, thanks!
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96GT:BBK CAI,X-Pipe,plenum,75mm TB,JBA wires, Accel coil packs, SCT X-Calibrator II Dyno-tune, 180termo,Centerforce Dual-Friction clutch, Hurst Billet Shifter,FR(ceramic coated)shorty headers, 3.73 Gears, Magnaflow Cat Back(3.5 tips), FR handling kit,Bullit wheels: 18x9, 245/40/ZR18's front, 18x10, 285/40/ZR18's back,190gph FR fuel pump, Maximum Motorsport subframe connectors, Full PI swap. 246rwhp,288trq.
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"Drive It Like You Stole It"
i never heard of a cooling problem except for the intake manifold cracling and leaking at front coolent passage, updated intake with aluminum crossover , big g
It's a mod that fixes the low coolant flow problem to the #8 cylinder by taking advantage of a freeze plug on the rear of the head. It's not incredibly complicated but I can't remember right now exactly how it's done. Normally it's only really needed on a motor putting out over 500 crank horses, anything less than that and the coolant system is just fine as designed with a 180-160F thermostat and radiator upgrade. When I get home from work I'll try to look up some articles and pics to post links to for you.
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Sometimes I think that government fits that old-fashioned definition of a baby: An alimentary canal with an appetite at one end and no sense of responsibility at the other.
- Ronald Reagan
It's a mod that fixes the low coolant flow problem to the #8 cylinder by taking advantage of a freeze plug on the rear of the head. .
Yep... it replaces the freeze plug in the back of the head, and entails installing a tube off the back of the head, that T fitting into the crossover tube off the other heads, and into the heater hose.
This allows coolant to flow across both cylinders, greatly reducing the chance of detonation.
Thanks pal! I've added the site to a folder I'm making about potential mods when installing the PI upgrade, even if it list's DOHC engines I'll give them a call to see if it will work on SOHC engines. thanks man,really appreciate the heads up.
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96GT:BBK CAI,X-Pipe,plenum,75mm TB,JBA wires, Accel coil packs, SCT X-Calibrator II Dyno-tune, 180termo,Centerforce Dual-Friction clutch, Hurst Billet Shifter,FR(ceramic coated)shorty headers, 3.73 Gears, Magnaflow Cat Back(3.5 tips), FR handling kit,Bullit wheels: 18x9, 245/40/ZR18's front, 18x10, 285/40/ZR18's back,190gph FR fuel pump, Maximum Motorsport subframe connectors, Full PI swap. 246rwhp,288trq.
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"Drive It Like You Stole It"
what is the 7 & 8 cylinder cooling fix for 4.6 heads 
