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Replaced mine when I rebuilt the engine and never had a problem.

I didn't just rebuild. I BUILT it.

0.040 bore
SS psitons
SS OS valves
270.430 cam
hv oil pump
bored TB
gasket matched intake
disabled EGR (not for performance, but for being cheap... It smacked the firewall when reinstalling the engine cracking the pipe. I just blocked it off instead of paying $$$$$ for a new one)

The other peice to my equation is environment... I couldn't keep the engine cool enough when I lived in Florida. ***poof*** Now I can't keep it cool enough when pulling grades in the Alps. Or when rolling 100+ on the Autobahn. Numerous excessive heat cycles are causing my failures. None happened during an overheat, but I attribute the eventual failure to excessive heat.

I haven't ordered my new gasket yet... I can't afford everything else I am going to do at the same time. I am replacing the radiator with a HD V6 one, and adding a digital temp guage, so I never have to go through this again.


You know, you may want to re-enable the EGR system. Does a nice job of keeping combustion temps down. More than you might think, actually.


X2

EGR is actually designed to keep combustion temperatures down, not just to keep NOx emissions, but to also keep the engine from being damaged by excessive heat from high combustion temperatures.

formerly 277000_yota
Old enough to know better, but still to damn arrogant to care...
]www.cardomain.com/ride/2614269
'90 'Yota 4X4 (10/31/05-09/10/08 R.I.P)
'98 'Yota t-100. 3.4, 5 sp. 4x4, 2 in. Toytec with BFG A/T 265/70R16s