ST220 3.0l engine top end rattle
Discussion
Hi all... I'm looking to find out if anyone has had any Tappet or chain rattles?
I have what sounds like a tappet rattle but it only does it from 2500rpm onwards and appears to reduce under load.... I'm also told that it's rare for a tappet to go on these.
It's actually a noble but the heads, cams and chains etc are STD mondeo st220 and I have done more miles that the normal noble owner hence my question here.
Car still produces full power and has plenty of oil (10L as it has huge sump).
Any ideas or experiences?
Cheers
Car still produces loads of power
I have what sounds like a tappet rattle but it only does it from 2500rpm onwards and appears to reduce under load.... I'm also told that it's rare for a tappet to go on these.
It's actually a noble but the heads, cams and chains etc are STD mondeo st220 and I have done more miles that the normal noble owner hence my question here.
Car still produces full power and has plenty of oil (10L as it has huge sump).
Any ideas or experiences?
Cheers
Car still produces loads of power
Mine would make a tapping but only when warm, it was evident at idle and would get louder until about 3500RPM IIRC. Performance was fine, Ford did have a TSB for the water pump pully cam bearing cams,slacken them off & retighten. They tried that but still the same. This was all under warranty so do not know about cost, it wouldn't have been cheap though, the cams come with the heads etc.
I've still got the video but no webspace to upload it to.
I've still got the video but no webspace to upload it to.
Mine is only really evident from 2000rpm.... Hard to tell if it tails off or goes to redline BUT it's definatly only pressent on throttle.. Drive along at 30mph and 3000 rpm back off throttle tapping goes totally reapply very light throttle and returns instantly.
Gona try briefly removing the water belt to see if that's the issue with the cam bearing.
Gona try briefly removing the water belt to see if that's the issue with the cam bearing.
Didn't mean drive it with belt off, just released the tension with a bar... Done that but no change in noise at revs.... Spent a little time listening to engine through a scope and there is definate tapping on idle on the inlet cam of no1.... None of the other followers emit any noise at all.
Can't tell if this is the noise I'm hearing at revs as too much other noise going on.
Seems too much of a conincidence to me so gona try replacing the cam bearing (apparently undoing and retorquing is known to have no effect!) and see if that solvs as it's a fairly simple job :-)
Can't tell if this is the noise I'm hearing at revs as too much other noise going on.
Seems too much of a conincidence to me so gona try replacing the cam bearing (apparently undoing and retorquing is known to have no effect!) and see if that solvs as it's a fairly simple job :-)
It might be worth having the chain tensioner replaced, they can fail and cause problems. Having said that, it is usually obvious that it is failing once you have all the covers off etc. Not sure how accessible they are on that installation.
I don't know if the 3.0 has hydraulic tappets (I would guess it has), if so then it may be that they are getting starved of oil, or are sticking due to residue build up. When that happens on my ancient iron-block I4 I use Wynns additive which is supposed to clean it off (inevitably for 3 months or so) but on yours it may be safer/cheaper all round to get the 'buckets' replaced.
An interesting item here: http://www.stdrivers.co.uk/forum/showtopic.php?tid...
It is a TSB for the Maverick only for some reason, but according to the thread it is relevant to other installations too:
I don't know if the 3.0 has hydraulic tappets (I would guess it has), if so then it may be that they are getting starved of oil, or are sticking due to residue build up. When that happens on my ancient iron-block I4 I use Wynns additive which is supposed to clean it off (inevitably for 3 months or so) but on yours it may be safer/cheaper all round to get the 'buckets' replaced.
An interesting item here: http://www.stdrivers.co.uk/forum/showtopic.php?tid...
It is a TSB for the Maverick only for some reason, but according to the thread it is relevant to other installations too:
its done 45k most of which in my hands... doesnt sound like a bottom end knock to me especially as it completely vanishes off throttle regardless of revs.
I was fairly sure it was the timing belt etc but I have a definate tap from the followers next to the water pump pulley... hopefully my noise is entirelly this, its my everyday car so I can do without it being anything serious lol
I was fairly sure it was the timing belt etc but I have a definate tap from the followers next to the water pump pulley... hopefully my noise is entirelly this, its my everyday car so I can do without it being anything serious lol
On my old mondeo 2.5 duratec it developed a tapping noise which we changed water pump, power steering steering pump because it sounded like a pump had gone and it sounded like it was top end.
In the end we just left it and ran it for another 25000 miles with no problems then sold it.
We assumed in the end that it was a stuck chain tensioner and it freed it self as & when it felt like it.
In the end we just left it and ran it for another 25000 miles with no problems then sold it.
We assumed in the end that it was a stuck chain tensioner and it freed it self as & when it felt like it.
Well, took it to fords who agreed it sounded like tappets but had never had one in with this issue.... so I replaced all the tappets, timing chains, tensioners and guides.
Car now sounds brand new and very quite on idle... however above 2000rpm the rattle is still there... after lots of listening to the engine its clearly coming from the rear middle of the engine and its apparently the little ends
So... I am now faced with a complete rebuild.. oh well, time to upgrade
Car now sounds brand new and very quite on idle... however above 2000rpm the rattle is still there... after lots of listening to the engine its clearly coming from the rear middle of the engine and its apparently the little ends
So... I am now faced with a complete rebuild.. oh well, time to upgrade
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