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Old 03-28-2012, 07:24 PM
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subzali subzali is offline
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Join Date: Aug 2005
Location: Denver CO
Posts: 8,619

I think conventional Land Cruiser wisdom says that the cracks in the intake manifold are due to the exhaust recirculation plate getting stuck in the closed or slightly closed position, which constantly redirects air upwards against the bottom of the intake manifold, overheating it, and cracking it. I could see that the CTE differential in the cast iron and aluminum could contribute to that though with thermal cycling. Haven't heard of a cracked intake on an engine that had a properly working exhaust recirculation plate in the exhaust manifold though.
Matt Miller
TLCA# 13684
1977 FJ40 2F "Brahma" + Lockright, tach, Warn 8274, FJ60 Power Steering, no more Sanden OBA (factory emissions), so Puma OBA
1996 FZJ80 1FZ-FE factory lockers + Safari intercooled turbo, Warn M12000, OEM CDL switch, cup holder, and hand throttle, Metric TLC leather, heated seats, JDM switches, Puma OBA
2000 Tundra Limited TRD 2UZ-FE SOLD
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