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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
td5 making tapping noise, stops when pedal lifted
can anyone suggest what is causing a kind of tapping or light hammering sound when accelerating but seems to go when i go faster about 50mph, sounds like an injector but there is absolutely no smoke out of exhaust no matter how hard i rev it under load or in neutral, as soon as i back off throttle the noise stops,
even if i go down a steep bank and drop a gear and let clutch out there is no sound, only when i press accelerator pedal,,
so im thinking it cant be an engine bearing, put new injector harness in and no change,, so if an injector had wrong clearance would it tapp with engine revs and not smoke? im at a loose end as it seems to start the tapping noise even if i just tickle the accelerator under load,, but in neutral it ticks over lovely and quiet and cant hear any tapping even when revving???
Post #669880 9th Dec 2017 5:05pm
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michaelwl



Member Since: 19 Nov 2014
Location: Durban
Posts: 65
South Africa 2002 Defender 110 Td5 SW Alpine White
Could be a warped exhaust manifold.
Do a search and you will find many articles on this. 2002 110 TD5 White
1981 S3 R6 Matt Green - Now used as game viewer
2013 Discovery 4 XS
Post #669907 9th Dec 2017 7:02pm
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
no dont think it could be that as that makes a high pitched screeming noise,, this is as discribed, tapping light hammering south that stops as soon as accelerator pedal in lifted, im thinking fueling system like injector or summit, seems strange it stops as soon as pedal lifted,,,
Post #669944 9th Dec 2017 9:34pm
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mk1collector



Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769
England 2004 Defender 110 Td5 CSW Bonatti Grey
Could be your crank pulley on the way out. Does the engine make a chirp noise when you switch it off? Ray
My build thread
http://www.defender2.net/forum/topic17615.html
Post #669957 9th Dec 2017 11:41pm
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
yeah just for a split second, ive had a aux belt pulley collapse about a month ago.. it may have put undue stresses on crank pully damper,, but would that cause tapping noise? and would it stop when accelerator lifted off?
Post #669962 10th Dec 2017 12:22am
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mk1collector



Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769
England 2004 Defender 110 Td5 CSW Bonatti Grey
I had what sounded like a marble rattling around when under load and a vibration at higher speeds which somehow(not sure how to be honest) is caused by the rubber vibration damper on the crank pulley starting to give up, luckily after a lot of frustration and searching for quite a while I found a perfect how to on discovery2 site that described my symptoms perfectly.

Have a read of this and see what you think Thumbs Up
http://www.discovery2.co.uk/CrankPulley.html

Hope it helps. Ray
My build thread
http://www.defender2.net/forum/topic17615.html
Post #669963 10th Dec 2017 12:33am
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
thanks mk1 collector, will have a read, i had a marble sound just before my aux belt idler pulley collapsed, this is different noise, goes up with revs its like a rythmic tapping sound then stops when accelerator is shut,
but it could still be what you have said as tensioners and pulleys can make some crazy sounds,, idler pulley sounded like a piston was hammering into something but was just an aux belt pulley,
Post #669964 10th Dec 2017 12:40am
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mk1collector



Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769
England 2004 Defender 110 Td5 CSW Bonatti Grey
The marble sound the vibration and the chirp all stopped when I changed mine so you never know Thumbs Up Ray
My build thread
http://www.defender2.net/forum/topic17615.html
Post #669968 10th Dec 2017 1:07am
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
i will give it a go,, tried to get under today and do a visual check but cant see nothing with the fan in place, stuck my rachet handle at rear of pulley wheel and tried prying it apart to check for play, wheel moved a tiny amount with medium force,, going to remove fan and have a proper look
Post #670036 10th Dec 2017 2:03pm
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mk1collector



Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769
England 2004 Defender 110 Td5 CSW Bonatti Grey
Mine didn't look damaged in any way and pulling on it didn't seem too loose but when tried next to a new one you could tell the difference. Ray
My build thread
http://www.defender2.net/forum/topic17615.html
Post #670037 10th Dec 2017 2:07pm
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
i bet thats the culprit, its too cold out there for me, any idea how much an indie or main dealer would charge?
Post #670058 10th Dec 2017 3:36pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2756
United Kingdom 
The part is about £250
Post #670319 11th Dec 2017 4:54pm
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mk1collector



Member Since: 17 Sep 2009
Location: West Yorkshire
Posts: 6769
England 2004 Defender 110 Td5 CSW Bonatti Grey
Apparently it's best to get genuine or oem but I can't remember how much it cost to fit as it was a good while back. Ray
My build thread
http://www.defender2.net/forum/topic17615.html
Post #670332 11th Dec 2017 5:28pm
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horus1970



Member Since: 27 Jul 2016
Location: north east
Posts: 105
England 1995 Defender 110 300 Tdi HT Portofino Red
cheers lads. does anyone know if it would be safe to remove my aux belt and drive up and down my street slowly to see if its making noise without belt,
its sub zero out there,, i realise waterpump runs off aux belt, was just curious as it takes 2 minits to remove aux belt but crank pulley is a bit more graft anyone ever ran there td5 without aux belt short test before?
Post #670344 11th Dec 2017 6:10pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
Short run - like 1 minute or less is OK, not more, and only with cold engine. But be aware - no power steering and no power for brakes - after 2-3 brakes you will be out of vacuum for brake servo. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #670348 11th Dec 2017 6:21pm
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