87 Volvo 740 trouble starting and misfires after timing belt change.
#1
87 Volvo 740 trouble starting and misfires after timing belt change.
Hi all,
I just got my 1987 Volvo 740 with 260,000km serviced by replacing the radiator, water pump, harmonic damper, all drive belts and the timing belt. The belts were getting a bit old and the timing belt was changed centuries ago, so it was time. The radiator had a little leak, so did the water pump, and the harmonic damper was also due for a change. My local mechanic did all of this; however, soon after driving the car away i realized that the engine was misfiring quite badly both at idle and while driving. Also, it cranked but had trouble starting up. Upon start up, if you switched into gear the car would simply stall (its a 4 speed AW71L auto). It would take multiple tries to start, and you had to wait 1 or 2 minutes until you could actually switch into gear without stalling.
For reference, prior to me giving the car to the mechanic it worked absolutely perfectly. There was absolutely no misfires, always started first time, and it never stalled when switching into gear. Ran very smooth.
The car had a new distributor, leads and spark plugs all replaced about 2 - 3 years ago so that's definitely not the cause of the misfire. The ignition system is in perfect condition.
So at this point i'm thinking the timing belt wasn't properly synchronized, which leads me to believe why its so rough, misfires and stalls.
The mechanic is closed over the weekend, so I am going first thing Monday morning to get this sorted as i paid a very large amount of $$$$ for all the repairs and i am VERY disappointed with the service.
Could anyone please share their thoughts on this? Perhaps it could be something else?
Thank you.
I just got my 1987 Volvo 740 with 260,000km serviced by replacing the radiator, water pump, harmonic damper, all drive belts and the timing belt. The belts were getting a bit old and the timing belt was changed centuries ago, so it was time. The radiator had a little leak, so did the water pump, and the harmonic damper was also due for a change. My local mechanic did all of this; however, soon after driving the car away i realized that the engine was misfiring quite badly both at idle and while driving. Also, it cranked but had trouble starting up. Upon start up, if you switched into gear the car would simply stall (its a 4 speed AW71L auto). It would take multiple tries to start, and you had to wait 1 or 2 minutes until you could actually switch into gear without stalling.
For reference, prior to me giving the car to the mechanic it worked absolutely perfectly. There was absolutely no misfires, always started first time, and it never stalled when switching into gear. Ran very smooth.
The car had a new distributor, leads and spark plugs all replaced about 2 - 3 years ago so that's definitely not the cause of the misfire. The ignition system is in perfect condition.
So at this point i'm thinking the timing belt wasn't properly synchronized, which leads me to believe why its so rough, misfires and stalls.
The mechanic is closed over the weekend, so I am going first thing Monday morning to get this sorted as i paid a very large amount of $$$$ for all the repairs and i am VERY disappointed with the service.
Could anyone please share their thoughts on this? Perhaps it could be something else?
Thank you.
#2
You had a lot of things replaced but the timing belt is the only one that would cause what you describe, actually pretty good indicators of incorrect belt alignment. You should also have reduced power.Go back to this meister and have him redo the timing belt alignment. Hopefully everything else was done right, are getting heat?
#3
#5
#6
In my opinion and experience, it seems like the mechanic aligned the timing belt one tooth off. I've done it by accident when replacing a timing belt in the past. Luckily, it's a relatively easy adjustment, you just have to take enough things off to get to all three of the timing belt gears. Hopefully the mechanic you used won't give you a hard time, seeing as how they really should've started the engine to ensure proper timing before releasing it back to you..
#7
In my opinion and experience, it seems like the mechanic aligned the timing belt one tooth off. I've done it by accident when replacing a timing belt in the past. Luckily, it's a relatively easy adjustment, you just have to take enough things off to get to all three of the timing belt gears. Hopefully the mechanic you used won't give you a hard time, seeing as how they really should've started the engine to ensure proper timing before releasing it back to you..
Thread
Thread Starter
Forum
Replies
Last Post