K-jet injectors and timing marks on '81 240

Folks,

I'm the proud new owner of a 1981 240 wagon. It has only 111K miles
and it's in really good shape. I'm the third owner (the first two
were father and son). The car sat for perhaps a year before I bought
it. The main fuel pump was frozen up, and I've had to replace the
water pump and a few other minor items.

My real problem has to do with a very rough idle (rougher when cold)
and perhaps hard starting when warm. I've put injector cleaner in the
gas, but I've put only 20 miles on it since (to drive it home after
taking possession). Among other things I'm in the process of checking
out, I've noticed that I can wiggle the injectors quite a bit. They
don't flop about, but at their ends they may move between 1/16th and
1/8th inch in any direction. My question is: should they move this
much? The LH injectors on my '84 don't move at all (since they are
captured by the fuel rail). Do I need to replace the seals on the
K-jet injectors? If I do this, I also presume I should observe their
spray patterns while they are out.

My second significant problem has to do with an apparent lack of a
timing mark on the belt pulley. I found no notch or marks of any kind
when I had the fan off while installing the new water pump.
Consequently, while I had the timing belt cover off, I hand cranked
the main shaft such that the cam and intermediate sprockets were
aligned to TDC (as marked in white on the sprockets). Where the main
pulley fell at the index cast into the front seal housing, I filed a
shallow notch in the shieve that would be closest to the timing marks
cast into the timing belt cover.

After I reinstalled the timing belt cover, I was surprised to find the
notch at the 20 degree mark. Now that I've had a timing light on it
and found the notch at about the five o'clock position, I wonder
whether or not I actually notched the shieve at the right place. Any
thoughts?

Many thanks for your help!

Todd Carney
Ashland, Oregon

 

Whilst the engine is idling, spray the indector bodies down near where
they mate into their holders with WD40. This will temporarily seal the
injectors from sucking air if the seals are leaking (or it will add more
fuel to compensate for the more air), I'm not sure which.

If the idle improves and smoothes out, then you need to replace the
injector seals--really cheap to do. Injector cleaner should clean up the
spray patterns eventually. Use only pure Techron, not anything with
some Techron in it for cleaning the injectors.

Be very careful with high pressure fuel spraying from injectors lest you
burn up your new Volvo.

 

If you inspect the sheaves for the crank pulley you will notice that the
center mounting hole has a notch. On the crank sprocket face there is a
dowel pin that matches the notch. If when the sheaves are removed, to
adjust the spacers for example, and they are reinstalled without regard
to the notch, tightening the four bolts and two nuts will simply push the
dowel pin into the flange and leave the timing mark on the sheaves in any
of five incorrect places or one correct place.

Bob