02-28-2010, 02:01 PM
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CC Member
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Join Date: Sep 2004
Location: Canberra,
ACT
Cobra Make, Engine: G-Force Cobra '68 302, T-5, Jag 3.77 LSD.
Posts: 993
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Not Ranked
Dave, I had a 6 cyl crossflow Cortina once that had the same issue as you describe. Temp fine under 110 k's but sit on more than that and temp crept up.
I never solved the problem untill the block was caustic dipped when I had it out for a work over.
Bit difficult with an alloy head to flush it with caustic. Maybe there is another good product available for flushing iron blocks without harming the alloy bits.
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