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

Reply to
Todd F. Carney
Loading thread data ...

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.

Yes!

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

Reply to
Steve Rogers

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

Reply to
volvowrench

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.