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That's why I shudder when guys change the timing chains without changing the HGs. You gotta figger:
1) it's an old truck and they ain't the original owner
2) being an 'old truck', as opposed to how WE see them (classics), they didn't likely get the best of care
3) the radiators likely sprung a leak somewhere in their history, like a pinhole in the top, and maybe it got changed, maybe they threw in Stop-Leak [shudder]
4) the major eaters of HGs are infrequent head bolt torqueing, overheating, and lousy coolant condition.
Odds on whether any of those happened? Or all of them?
So I change the HG.
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-Bill
Rising Sun 4x4 Land Use Coordinator
1987/1990/1996/1984/1986 5VZ-FE SAS 4Runner
Yeah, I know, but about the only 1987 part on it anymore is the body[edit: even that ain't 1987 now...]
What is a minitruck guy doing on a Land Schmooser forum, anyway??!?!
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