 | Home > Td5 > Intermittent 'over-revving' |
 
|
|
|
and it does not particularly occur straight after a gear change. In addition, on a standing test tonight, under heavy revving, it will fire out a plume of black smoke and I noticed from tonight's fill up that mpg is down on my typical level, so there appears to be some element of over-fuelling going on.
| decnal Member Since: 09 Oct 2011 Location: Brisbane Posts: 4   
|
party monkey, how many miles has your clutch done?
I don't have any suggestions I'm afraid but I have been experiencing exactly the same 'over revving' behaviour (but not the black smoke) so am very interested in opinions anyone may have. It has been happening to me intermitantly in 3rd or 4th when accelerating reasonably hard, when the revs get a bit above 2,000rpm, which I guess is when the power delivery is increasing to maximum I have a 2005 Td5, EGR removed and stage 2 remap from a forum sponser with no exhaust mods. She has 105,000 km on the clock, of which I have done about 7,000 km. I was thinking that the clutch is going, but considering the relatively low km's, the previous owner must have treated it real bad. Is there any other potential cause for over-revving or are we looking at clutch replacement? A clutch replacement at 105,000 km seems very premature |
||
25th Sep 2012 6:43am |
|
| party monkey Member Since: 31 Dec 2010 Location: Oxon. Posts: 1311  
|
Hi Decnal, Truck has done just under 60,000 miles (around 96,000 km) in total. I've done around 25k miles (40,000km) in it.
No clutch change in my ownership and no evidence of previous owner having changed anything, so I'd assume I'm on the original clutch... Jon - 110 td5 [sold]. Currently Defenderless. |
||
|
25th Sep 2012 7:10am |
|
| Landlord Member Since: 27 Oct 2009 Location: Hampshire Posts: 582  
|
Sounds like the clutch on both of yours is on the way out. I had my first clutch changed at 34k and again at 40k. its a TD5 with a fairly aggressive remap, EGR removed and decat exhaust, the remap is supposed to be about 175bhp. Have spoken to another owner recently who has had the same experiences with clutches. We don't tow and only use the vehicles for about 6000 miles pa.
I did research the clutch issues before the last change at 40k and the well known tuning suppliers all agreed that OEM clutches are up to the remaps to abut 200bhp. I did consider changing to a solid flywheel and racing friction plate but wanted to keep it fairly standard. However, although the standard clutch will take the extra power it appears the pressure plate will not last long ! The symptoms you are describing sounds very much like the clutch is slipping as the turbo spools up after 2000 revs. As the power kicks in and is transmitted to the wheels the clutch starts to slip until the road speed better matches the RPM or you ease off on the throttle. Symptoms are greatest in 3rd and 4th and probably 5th going up a hill. If you PM me with the remap details I can compare it to mine. It looks like its the more aggressive remaps are a contributing factor to the life of the clutch. I am not knocking the remaps but you may have to accept a shorter working life of some of your drive train. Obviously there will be exceptions and some will last for years. 2007 TD5 90 Hard Top |
||
|
25th Sep 2012 7:39am |
|
| twopoint6khz Member Since: 18 Aug 2011 Location: North Lakes Posts: 654 
|
Sounds exactly like mine - the clutch is on the way out. This only showed up when I had my remap, as the increased torque took the clutch over the edge
It's fine as long as you don't gun it in 4th all the time, so I'm gonna soldier on with mine for a few more miles (just under 70k now, presume first clutch). |
||
|
25th Sep 2012 7:44am |
|
| wslr Member Since: 18 Jul 2010 Location: Wellington, Somerset Posts: 581
|
Perhaps the clutch plate has got contaminated either from oil leaking from the crank seal, or from a fuel pressure regulator/rear rocker cover gasket leak.
|
||
|
25th Sep 2012 7:56am |
|
| party monkey Member Since: 31 Dec 2010 Location: Oxon. Posts: 1311
|
Many thanks for the feedback guys.
Just to compare remaps..... I have what I consider to be a fairly gentle allround remap. The main motivation was to improve the drivability and reduce the downshifts (which I have to say it has done in spades). I believe it would be equivalent to around 150bhp. I don't tow and would like to think I'm fairly mechanically sympathetic. No idea what may have gone on with the previous owners though. Will ask my local indy to investigate a potential slipping issue during the next service, which is imminent anyway. Will update here in due course. Thanks again  Jon - 110 td5 [sold]. Currently Defenderless. |
||
|
25th Sep 2012 8:11pm |
|
| decnal Member Since: 09 Oct 2011 Location: Brisbane Posts: 4
|
Thanks all for the comments guys
I don't drive her particularly hard and rarely bury-the-boot, hence the intermittence of the issue, so I can probably live with it for now. Is there any potential problem with leaving it as it is until the clutch really starts to go? I had not considered leakage as a potential cause. I'll have a good look around the back of the engine and check for any fluids that shouldn't be there. I assume there is no way to check if the crank seal is leaking without droping the gearbox? or is there a hole available to get a borescope in there to take a peek? |
||
|
26th Sep 2012 12:30am |
|
|
|
| All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2006-2025 Futuranet Ltd & Martin Lewis
