Bit of a strange one this. I've a few ideas in my head that might be causing it, but wanted to post to get other peoples views.
Dad's 106 1.5d. 105k miles on the clock, unknown service history before we owned it but doesn't burn any oil.
It cracked a downpipe a good few months ago
Downpipe was replaced and when it was replaced, the friend who fitted it said manifold bolts were loose also.
All torqued up and fine for a few weeks. Then brand new downpipe cracked again. 2 days later after driving like this, the mid section cracked and snapped completely. No rust / corrosion at either bit either. Clean breaks.
Dad's friend noticed where the bolt joins the downpipe to the engine to secure it was really slack. So bolt had slackened, causing downpipe to vibrate and crack.
Fitted down pipe number 3. Look underneath with engine running and vibrating really badly again. Few days later bolt loosens itself due to excessive vibrations and few months later downpipe has cracked again.
Engine mounts "feel ok" but not 100% sure the best way to test them. Put it in gear and tried pulling away with handbrake on and checking movement of engine and feeling for any clunks ect. All seemed fine, but not 100% certain.
The only other thing i can think of causing the vibrations through the engine could be the engine running rough. It sounds really chattery in the mornings and if you rev it hard when cold (i don't make a habit of this, was just to test) it shoots out a fair bit of soot from the exhaust. I'm wondering if maybe one or more of the injectors isn't firing correctly and is causing the engine to run rough and vibrate too much?
Any ideas from anyone else, as a bit stuck just now and it's getting annoying changing downpipes all the time.
Dad's 106 1.5d. 105k miles on the clock, unknown service history before we owned it but doesn't burn any oil.
It cracked a downpipe a good few months ago
Downpipe was replaced and when it was replaced, the friend who fitted it said manifold bolts were loose also.
All torqued up and fine for a few weeks. Then brand new downpipe cracked again. 2 days later after driving like this, the mid section cracked and snapped completely. No rust / corrosion at either bit either. Clean breaks.
Dad's friend noticed where the bolt joins the downpipe to the engine to secure it was really slack. So bolt had slackened, causing downpipe to vibrate and crack.
Fitted down pipe number 3. Look underneath with engine running and vibrating really badly again. Few days later bolt loosens itself due to excessive vibrations and few months later downpipe has cracked again.
Engine mounts "feel ok" but not 100% sure the best way to test them. Put it in gear and tried pulling away with handbrake on and checking movement of engine and feeling for any clunks ect. All seemed fine, but not 100% certain.
The only other thing i can think of causing the vibrations through the engine could be the engine running rough. It sounds really chattery in the mornings and if you rev it hard when cold (i don't make a habit of this, was just to test) it shoots out a fair bit of soot from the exhaust. I'm wondering if maybe one or more of the injectors isn't firing correctly and is causing the engine to run rough and vibrate too much?
Any ideas from anyone else, as a bit stuck just now and it's getting annoying changing downpipes all the time.
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