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SPOTTER
Member Since: 06 Dec 2006
Location: Adrift........
Posts: 3095
  
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Can someone please explain to me how the glowplugs work on the TDV6?
Are they intelligent or do they just work all the time.
Reason for asking is that mine has problems starting at the moment.....but this morning it started fine (0 degrees) and I noticed the glow plug light was on for about 5 times longer than normal!!!!!!!!!
...before i get onto the dealer........... end of an era ....... maybe a Defender when it appears.......
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 12th Dec 2007 10:21 am |
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tyke65
Member Since: 18 Nov 2007
Location: God's Country
Posts: 130
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My understanding (from the manual and 'wot I seen') is that they are intelligent. They only work when needed and for as long as needed. I may be wrong!!!
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| 12th Dec 2007 11:43 pm |
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Gareth
Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26703
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This morning, my glow plug light was on for about 10 seconds, it stayed on well past the 'System Check Bong' and it started first dab, and ran smooth and well from the outset. The outside air temp was minus 5.
Usually the light goes out with, or before the bong. So I reckon its intelligent 
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| 12th Dec 2007 11:48 pm |
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lee01277
Member Since: 06 May 2005
Location: Shed
Posts: 821
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I just googled " tdv6 glow plug " .. only 81 hits and rucks of stuff from all over the planet covering this, even some from this forum ... ..............Somewhere in-between my old D3 and what's to come next .........
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| 13th Dec 2007 12:56 am |
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SPOTTER
Member Since: 06 Dec 2006
Location: Adrift........
Posts: 3095
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thanks all, I shall try google lee  end of an era ....... maybe a Defender when it appears.......
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| 13th Dec 2007 6:03 am |
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tyke65
Member Since: 18 Nov 2007
Location: God's Country
Posts: 130
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Gareth wrote:This morning, my glow plug light was on for about 10 seconds, it stayed on well past the 'System Check Bong' and it started first dab, and ran smooth and well from the outset. The outside air temp was minus 5.
Usually the light goes out with, or before the bong. So I reckon its intelligent
You get a 'System Check' bong? I don't know if I do. Now I'm worried. Trouble is there are so many bongs that I still don't know what they're all for. One that had me worried was the frost warning bong - not so much that it happened but that it's not in the manual and the LR main agent from whence the car had come a couple of days earlier didn't know that there was a frost warning bong! Maybe I'll compose a bong list. I'm retired and it's cold outside. I've got to keep my brain active somehow.
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| 13th Dec 2007 8:34 am |
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10forcash
Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534
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Quote:GENERAL
The glow plug system has a glow plug installed in the inlet side of each cylinder. The glow plugs heat the combustion chambers before and during cranking, to aid cold starting, and after the engine starts to reduce emissions and engine noise when idling with a cold engine.
A glow plug wiring harness on each bank of glow plugs is connected to a separate relay and fusible link in the Battery Junction Box (BJB). The individual glow plugs are grounded through their fixing in the cylinder head. Operation of the glow plug relays is controlled by the Engine Control Module (ECM), which also controls the illumination of the glow plug indicator in the instrument cluster.
Each glow plug is a tubular heating element which contains a spiral filament encased in magnesium oxide powder. At the tip of the tubular heating element is the heater coil. Behind the heater coil, and connected in series, is a control coil. The control coil regulates the current to the heater coil to ensure that it does not overheat.
SYSTEM OPERATION
There are three phases of glow plug heating: Pre heating, crank heating and post heating. The ECM determines the heating times from the Engine Coolant Temperature (ECT). The lower the ECT, the longer the heating times.
When the ignition switch is turned to position II, the ECM calculates any required heating times and, if heating is required, energizes the glow plug relays in the BJB. When pre heating is required, the ECM also sends a message to the instrument cluster, on the high speed CAN bus, to request illumination of the glow plug indicator. The glow plug indicator remains illuminated for the duration of the pre heating phase, or until the ignition switch is turned to the crank position, whichever occurs first. If required, the ECM keeps the glow plug relays energized during cranking and for the duration of any post heating phase.
The ECM monitors the drive circuit of the glow plug relays for plausibility of operation, continuity, and short and open circuits. If a fault is detected, the ECM stores a related fault code and permanently illuminates the glow plug indicator while the ignition switch is in position II.
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| 13th Dec 2007 5:35 pm |
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BLFarrar
Member Since: 02 Aug 2006
Location: Deepest, Dankest, Darkest, Dingiest......Le Halifax, West Yorkshire...with strong links to Ireland
Posts: 6222
 
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...does the TDV6 engine actually have 6 - a glow plug for each cylinder......the TD5 Disco 2 "storm" engine had 4 "I wonder why" technical reasons, value engineering, the system was half a V8 set up. BREXIT - done properly.
Right now ...We need Government - not Politics
Save the Dipstick Flagbearer-keep it simple, less likely to fail campaign-agenda items:Starting Handles, Acetylene Lamps.
Founder: Dipsticks-R-Us Inc
D3 HSE-perfectly formed, passenger friendly...has real DIPSTICK
Jag XK-but sadly no DIPSTICK...HUGE design fault
FL2 has DIPSTICK..."real comfort in rear seats"
VW Golf wondermobile (?)..has real DIPSTICK
Morris Minor..original DIPSTICK technology..and a real KEY.
Last edited by BLFarrar on 14th Dec 2007 8:05 pm. Edited 1 time in total
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| 13th Dec 2007 10:26 pm |
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Slimer
Site Moderator
Member Since: 06 Jan 2005
Location: Last Exit to Nowhere
Posts: 16295
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10forcash wrote:Quote:GENERAL
The glow plug system has a glow plug installed in the inlet side of each cylinder.
 The End
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| 13th Dec 2007 10:30 pm |
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Nigel Tracey
Member Since: 04 Nov 2006
Location: Lausanne
Posts: 395
  
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Spotter,
I guess this post is in connection with your starting woes ? I have to say that now I'm giving the glowplugs more time to "Glow" and I'm NOT pumping the gas, D3 starts like a good'n. Even this week with some -2 and -3's she's been behaving. I must admit that I didn't (foolishly) realise the importance of the glowplug warm up - but then I never read manuals  Mrs Jones ? We've come for your Liver
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| 14th Dec 2007 12:40 am |
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TR
Member Since: 11 Nov 2007
Location: Hampshire
Posts: 88
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NOTE OF CAUTION
My D3 was sent back to dealer this week with a problem which showed up as a potential stall at first junction after inital start up each day.
Last week they replaced the injectors and diesel filter which did not resolbve the problem
They are now saying that the glow plugs showed up as faulty unfortunately in trying to change them they were found to be stuck (welded) to the head which has now been removed and sent to specialist for sorting.
Thankfully its under warranty!
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| 14th Dec 2007 7:12 pm |
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SPOTTER
Member Since: 06 Dec 2006
Location: Adrift........
Posts: 3095
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I am being particularly religious about letting the glow plug light go out before staring....sometimes long after the bong.........however sometimes it works (i.e. starts fine) and sometimes (the mjority) it doesn't. The length of time they stay on appears to be a tad random though which may be a problem........................I would have assumed, the colder the block the longer the pre heat needed, but the car doesn't seem to agree
learn't importance of glow plugs with Tdi...if you didn't let them go the whole course in the cold, teh neighbourhood disappeared in smoke
Might get my dealer to talk to yours TR if you don't mond as they are teh same group. end of an era ....... maybe a Defender when it appears.......
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| 14th Dec 2007 8:34 pm |
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Nigel Tracey
Member Since: 04 Nov 2006
Location: Lausanne
Posts: 395
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Spotter,
Thanks for the "Smoke" comments, all is clear now, unless I don't pre-heat long enough. I had not realized this was the cause, but it makes sense. I guess it's un-burnt fuel ?
Had the same problem with my old RS2000 when I fitted twin 48dDGS weber carbs, only the the un-burnt fuel came out as flames on a change down from 3rd-2nd  Mrs Jones ? We've come for your Liver
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| 14th Dec 2007 8:39 pm |
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TR
Member Since: 11 Nov 2007
Location: Hampshire
Posts: 88
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Spotter I found it helped to get LR customer service to talk to the dealer.
That way it seems the warranty issue is easier to resolve , they have even arranged a loan car as the dealer had nothing available , which just happens to be a RR Vogue , not the worst that could have been offered!
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| 16th Dec 2007 10:41 am |
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TR
Member Since: 11 Nov 2007
Location: Hampshire
Posts: 88
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A quick update for all interested in glowplugs /poor starting
Apparently a TSB exists regarding early model problems with poor thread forming in heads for glowplugs.
This results in exhaust gas blow by and hence glowplugs sticking / breaking upon removal.
A symptom of poor cold starting is related to this issue.
My D3 has just been returned after 1 week at dealer , heads removed threads reformed , new glowplugs fitted
Total bill £3800 , thankfully under warranty.
I am still not convinced it was the cause of the near stall at first junction after cold start but will try out next few days
Any one else with this problem ?
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| 23rd Dec 2007 12:12 pm |
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