This is interesting, I am eventually going to rebuild my CRX motor and when I
heard this
about bending blocks it kinda intimidated me. Didn't sound quite right though
to me but I
forgot some motors are aluminum. I knew the list would be able to figure it
out. Not sure
the older cars have this problem, I think my block is iron. I guess I will find
out.
Thanks
"Robert E. Shlafer" wrote:
> On 1/28 @ 9:47pm, Rob Lewis wrote:
>
> "Aren't most Honda motors made of aluminum? Could it be that they are so
> flimsy, they are easier to warp?"
>
> According to today's discussion of
> the subject with my mechanic, your
> guess is "spot on", Rob.
>
> Yep...according to my mechanic, this
> is exactly the reason. In their quest for
> efficiency and CAFE fuel numbers, the
> Japanese have made their fair share of
> errors (Frank is gonna love this!). Building
> "lighter" engines appears to be one
> of them, this problem not being limited
> to just their Hondas.
>
> My mechanic confirms that simply re-
> placing a head gasket and re-torquing
> the head to spec. can indeed unseat
> the piston rings. And this problem does
> not show up immediately, but over time
> and/or miles, normally coming to light
> well out of the warranty period covering
> this work.
>
> He states that on such "known" engines
> that he will not even perform the work,
> explains the reasons why to the customer,
> and advises to simply trade the engine
> in on a complete rebuild.
>
> According to him, the last five years also
> has seen prematurely worn valve guides
> and sludging problems with light weight
> Japanese aluminum engines, inclusive
> of those that power their trucks.
>
> Matter of fact, he just had a Toyota
> truck in ("6") which shows very acceptable
> compression/leak down figures having been brought in due to excessive
> oil
> consumption/exhaust smoke (blue).
>
> Tommy replaced the valve seals and this
> seems to have done the trick but only time
> will tell. Interesting point is that it took
> him most of the afternoon cycling water
> through the cooling system to clean out
> the filth. The engine has less than 50K
> on it and while he uses synthetic oil,
> follows the recommended maint. sched.
>
> Tom thinks the real problem here is
> really excessive blowby due to weak
> engine construction despite good "static"
> compression/leakdown numbers, but
> only time and use will tell. This is not
> the first time my mechanic has seen
> this in recent Japanese all aluminum
> engines, BTW.
>
> Cap'n. Bob (Ret'd)
> '60 Frog
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