Technical aspects of automobiles

Zero Interference Engine

SWMBOs’ Subaru managed to melt down one of the timing belt idlers this
past weekend. It’s a 1997 Subaru Legacy with the 2.2L engine.

Upon removing the plastic cover I found that one idler (the one that is
toothed) was completely missing. There were also two very impressive
pea-sized holes melted in the bottom of the cover. It looks as if the
outer surface made its way straight out the front of the cover as well.

All of this happened at speed on the highway and resulted in a dead
no-run situation. I’m sure the belt slipped far enough as to render the
timing way off.

I’ve ordered the parts to fix it up, but I’m worried about whether or
not she’s munched a couple of valves or a piston or three. I did crank
the engine over for just a few revolutions before I found what the
damage was, and heard no valve-slapping kinds of noise, so I’m hoping
there is no other damage. I’d rather not pull the motor to find out.

Anyone know off-hand if this is a zero interference motor or not?

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posted by admin in Без рубрики and have Comments (3)

3 Responses to “Zero Interference Engine”

  1. admin says:

    Yes it is an interference motor. Make sure you replace the self
    tensioner when you do it.

  2. admin says:

    jfrancis…@gmail.com wrote:
    > Yes it is an interference motor. Make sure you replace the self
    > tensioner when you do it.

    Yessir, and thanks.

    Parts are in and I will most likely start the repair this Saturday.

    <hope>
    No Bent Valves, No Holed Pistons!
    </hope>

  3. admin says:

    TomO wrote:
    > jfrancis…@gmail.com wrote:
    >> Yes it is an interference motor. Make sure you replace the self
    >> tensioner when you do it.

    > Yessir, and thanks.

    > Parts are in and I will most likely start the repair this Saturday.

    > <hope>
    > No Bent Valves, No Holed Pistons!
    > </hope>

    Short story made shorter:

    Anyone wanna buy a ’97 Subaru – new timing set, needs head work – cheap!

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