Volvo_240_Atari_2600 »
- 89 245
- 238 k, AT, Non Turbo
- with AC
- Florida
I noticed the other day my alternator was running on one belt.
Engine off, I saw this and realized I lost that one somewhere.
Yesterday while at Autozone, I purchased the missing belt and checked the transmission fluid level and the engine was running of course.
I noticed the large crank pulley was the only pulley that seems to have a little play… When I say play, it looks unbalanced, maybe bent? but it clearly does not rotate flat like all the other accessory pulleys on the engine.
Five years ago, pep boys replaced (at least they say they did) the crank pully saying that with this vintage volvo gaving a problem where a rubber back of some sort starts to give… Five years ago when I had this servide done by them, I had what appeared to be a dead battery. Batery was dead but they said batery and alternator were fine and the problem was the pulley.
Running on one alternator belt for about 3 weeks I do notice at initial start up in the mornings, the “alt/battery” light on the dash comes on and will come off when I just add a little pressure to thegas pedal… Then its business as usual as the day goes on at any and every start up.
Does this pulley thing sound right?
If so, is it relatively easy to replace from home?
If so, are there any special tools needed?
Are there any detailed write ups in case timing must be adjusted?
Crankshaft Pulley Vibration Damper
billofdurham »
Does this pulley thing sound right?
Yes. The crankshaft pulley on the ’89 240 is, in fact, an oscillation damper. You have a centre pulley section with a rubber strip sandwiched between it and an outer pulley section. The rubber does go soft and can cause timing problems, but only if you are trying to adjust the timing. It does not affect the timing belt.
To replace the pulley you need to remove the belts from it and then remove the crank bolt and the pulley will come off. It sounds so easy BUT the problem lies in getting the bolt out. Ideally the crank should be held captive using the Volvo crankshaft holder. There have been various methods described for removing the nut without the tool but most of them can cause damage to the crankshaft. The pulley has a little extrusion that does the work of a keyway/shaft. It is a cast part and it is delicate. In the old days it was enough to put a socket with a breaker bar over the pulley bolt, wedge it against something solid, usually the floor, and turn the starter over to break loose the bolt. NO MORE!! That little extrusion will break off or weaken so it breaks later and all your accessory drives will grind to a halt. That little piece of metal is special order. Get the right tool and restrain the pulley as it should be done. You may be able to hire one as other tool makers have brought out the equivalent.
Doing this job should not affect the timing belt as you are not touching it.
89 240 Crank Pulley looks unbalanced?
Last Updated on June 17, 2024
