For me the true risk is breaking something I lay hands on, like stubborn fasteners or frayed cables. The other stuff doesn’t scare me. 

Stephen

Mobile

> On Feb 11, 2022, at 1:01 PM, Alex MeVay <alex@mevay.org> wrote:
> 
> Is there any risk of collateral damage when doing a valve clearance
> adjustment on an engine that is decades overdue?
> 
> 
> Long version:
> 
> GF's parents are the original owner of a 1985 Land Cruiser, which they
> graciously let us use when we visit.  Car lacks power and they don't
> really take it on the highway anymore.  A quick google showed that
> this engine has adjustable valves.  They don't remember ever having
> the valves adjusted.  I also noticed the brake boost is noticeably
> lower at idle, which I guess is a sign of weak vacuum from the intake
> valves not closing fully.  Their local mechanic recently $oaked them
> for new brakes because ZOMG SAFETY, didn't bother addressing a
> destroyed sway bar end link which is visible right from the street,
> and claims a valve adjustment needs special tools.  From a little
> internet reading the "special tools" are a 14mm wrench, $6 feeler
> gauge, and a flathead screwdriver.
> 
> Anyway, I'm interested in doing this work next time I'm there, but
> since no good deed goes unpunished, and there is an obvious social
> component here, is there any risk that doing the valve clearance on an
> engine that's been so sorely neglected would cause stresses resulting
> in other damage (broken valves, etc.)?
> 
> Thanks as always,
> 
> Alex