Post by wannabe on Apr 13, 2016 18:40:12 GMT
Hi all,
With apologies for cross-posting here and also on that other forum lol, I have an issue related to a loose cambelt cover bolt that is located behind the alternator pulley and need the forum's help! I'm not afraid to ask stupid questions so here I am... lol
Basically, it was running spot on but then had a weird intermittent tapping/rattling sound come on - it didn't seem to be related to anything in particular, it just came on at random.
After managing to recreate it while parked up (revving it using the throttle cable with the bonnet up) I and my much-more-handy friend tracked it down to sounding like it was coming from behind the alternator pulley.
My much-more-handy friend was good enough to whip the cam cover off and we found the following:
Clearly this was not supposed to be like this!
We then removed the top cambelt cover to get a closer look:
but couldn't get anything in there to try to get it back in the hole.
So, we (my friend... lol) moved on and loosened the alternator so we could get the belt off the pulley, then loosened the pulley, which meant we could see this!:
Clearly the loose bolt was tapping against the rapidly rotating alternator pulley when jolted 'just so' by bumps.
I think I was lucky - if it had fallen out fully, it could have fallen down inside the cam cover and possibly damaged something rotating very quickly...
We tried but couldn't get it to tighten up properly - seemingly, doing so would just pull the cambelt cover against the idler pulleys you can see in the pictures and make them rub??
So, my questions are...:
- should there be a 'sleeve' on this bolt, which goes between the hole on the block and the central cambelt cover, which means the bolt can be tightened up properly against it?
- if not, how does it tighten up in the hole?!
We removed the bolt as we couldn't see how we could secure it, and the central cambelt covers seemed rigid enough to not move anyway (and are secured all the way round the edges with several other bolts and also the bottom edge of the top cambelt cover)...
- would this create an issue?
I ask because I thought removing the bolt would solve the issue and prevent it happening again, but now I have a really bad resonance, like a rattling/vibrating sound, specifically occuring between about 1800 and 2000rpm, which is also there in the background at other engine speeds.
I don't want to have to strip it down again (on my own tomorrow as my friend is at work) because I am useless
- Does anyone have any ideas what this new resonance could be? and if it's related to removing the bolt? Could it be that the pulley has not been bolted on dead-flat and is rotating out-of-true at certain engine speeds?
Any help anyone could give would be a lifesaver!!
(I know not everyone on here is on the other forum and vice versa, so apologies again for duplication if you're on both )
Thank yoooooooou!
With apologies for cross-posting here and also on that other forum lol, I have an issue related to a loose cambelt cover bolt that is located behind the alternator pulley and need the forum's help! I'm not afraid to ask stupid questions so here I am... lol
Basically, it was running spot on but then had a weird intermittent tapping/rattling sound come on - it didn't seem to be related to anything in particular, it just came on at random.
After managing to recreate it while parked up (revving it using the throttle cable with the bonnet up) I and my much-more-handy friend tracked it down to sounding like it was coming from behind the alternator pulley.
My much-more-handy friend was good enough to whip the cam cover off and we found the following:
Clearly this was not supposed to be like this!
We then removed the top cambelt cover to get a closer look:
but couldn't get anything in there to try to get it back in the hole.
So, we (my friend... lol) moved on and loosened the alternator so we could get the belt off the pulley, then loosened the pulley, which meant we could see this!:
Clearly the loose bolt was tapping against the rapidly rotating alternator pulley when jolted 'just so' by bumps.
I think I was lucky - if it had fallen out fully, it could have fallen down inside the cam cover and possibly damaged something rotating very quickly...
We tried but couldn't get it to tighten up properly - seemingly, doing so would just pull the cambelt cover against the idler pulleys you can see in the pictures and make them rub??
So, my questions are...:
- should there be a 'sleeve' on this bolt, which goes between the hole on the block and the central cambelt cover, which means the bolt can be tightened up properly against it?
- if not, how does it tighten up in the hole?!
We removed the bolt as we couldn't see how we could secure it, and the central cambelt covers seemed rigid enough to not move anyway (and are secured all the way round the edges with several other bolts and also the bottom edge of the top cambelt cover)...
- would this create an issue?
I ask because I thought removing the bolt would solve the issue and prevent it happening again, but now I have a really bad resonance, like a rattling/vibrating sound, specifically occuring between about 1800 and 2000rpm, which is also there in the background at other engine speeds.
I don't want to have to strip it down again (on my own tomorrow as my friend is at work) because I am useless
- Does anyone have any ideas what this new resonance could be? and if it's related to removing the bolt? Could it be that the pulley has not been bolted on dead-flat and is rotating out-of-true at certain engine speeds?
Any help anyone could give would be a lifesaver!!
(I know not everyone on here is on the other forum and vice versa, so apologies again for duplication if you're on both )
Thank yoooooooou!