Member Since: 28 May 2014
Location: Belfast
Posts: 496
Out in the car to day, good 30ml round trip (on petrol only) after reading and clearing the faults yesterday. No sign of any engine faults but the following found after reading just now:
ECU: Instrument Pack
CODE:U0010 Medium speed CAN communication bus (HISTORIC)
CODE:U0001 High speed CAN communication bus (HISTORIC)
CODE:U0132 Lost communication with ride level ctrl module / Lost communication with suspension ctrl module A (INTERMITTENT)
ECU: Transfer Case
CODE:U0155 Lost communication with instrument cluster control module (INTERMITTENT)
ECU: Automatic Gearbox
CODE:U0155 Lost communication with instrument cluster control module
CODE:U2003 Fibre optic communication bus (INTERMITTENT)
CODE:U2003 Fibre optic communication bus (INTERMITTENT)
There seems to be no consistency different faults each time. Though the faults for the HVAC, that I did not reload here again, did show. Could battery problems be a reason for the inconsistency?
17th Mar 2015 11:39 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
V8 compression test
V8 compression test Report post
Got around to doing compression test after an earlier posting in march about numerous fault codes, of which a few related to fuel mix and O2 sensors reading, particularly when running on LPG. Robbie raised the possibility of VSR (Valve Seat Recession) and the figures obtained today would seem to confirm his diagnoses:
The figures suggest that pressure is being lost in most of the cylinders, but that the loss is not past the rings, I know, a leak down test would be required to pinpoint the power loss, but as the car has run on LPG for almost 10yrs it's a good bet that VSR is a likely cause. Valve adjustment may possibly work. Worst case scenario is head needs reworked, but next move is to remove valve covers and check valve clearance.
Worst cylinder looks to be 5 as no change between Dry and Wet tests, a bit of a concern that but we'll see.
25th Apr 2015 11:07 pm
Mogwyth
Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976
Doesn't sound good.
As I said in response to your earlier thread the valve seats on mine were allegedly beyond redemption and were replaced with oem replacements, I have subsequently found that JE engineering do replacements with harden valve seats .==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
25th Apr 2015 11:37 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Expect that that's the way I'll be heading in the end, just hope someone here can do the hardened seats. Out of interest how much did the new seat set you back? I'll do the strip down my self but not looking forward to it. Have to get the LPG taken off first.
25th Apr 2015 11:45 pm
Mogwyth
Member Since: 03 Oct 2014
Location: Pwllheli
Posts: 3976
Nothing lol. It was done the week before I got it, but I do have the receipt.
Heads £1500
head Gasket set £268
Oil, filter, antifreeze, plugs etc £180
Labour £1260
So with the dreaded vat it came to £3800.
Not had this one apart much yet! But on my D2, there was enough movement in lpg setup that I could remove the throttle body, unbolt the plenum and move it to one side, without disconnecting the gas.==================================
05 D3 HSE V8 4.4
04 MG TF 135
03 MG TF 115 Cool Blue Edition
02 MG TF 160
00 Hymer B564 Lionheart
1971 Series III 109
26th Apr 2015 12:07 am
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Oh cr*p SWMBO won't be a happy bunny even if I do most work myself.
26th Apr 2015 1:23 am
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
I assume the v8 has hydraulic tappets?
26th Apr 2015 2:45 am
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
No, V8 tappets are like inverted cups with various thickness bottoms (52 in all from 2.95mm to around 3.715) that sit directly on the valves.
26th Apr 2015 11:48 am
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
It does look like VSR and sorry I was the bearer of such news.Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 28 May 2014
Location: Belfast
Posts: 496
You weren't really Robbie, you just confirmed my worst thoughts. I knew from reading around the subject that LPG promoted valve and valve seat degradation, I just didn't recognise the symptoms in the L3 and after the compression test I'm 99.99% sure.
26th Apr 2015 6:28 pm
Gareth Site Moderator
Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26705
Have you considered a used complete engine?
26th Apr 2015 6:34 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
Alphamale wrote:
No, V8 tappets are like inverted cups with various thickness bottoms (52 in all from 2.95mm to around 3.715) that sit directly on the valves.
So shimmed then, not seen shim son anything bigger than a motorbike engine, I can remember doing them on an old motorbike I had.
26th Apr 2015 6:49 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Not going down the road of replacement engine, to much involved (body off etc. a little beyond my, driveway, facilities).
I can do the head removal and refit (though a lot of work involved) myself, just need to send the heads out to an engineering co. to have heads reworked.
Yes, shimmed and not easy to check and fit though. The amount of work involved is just a little less than that required to take off the heads, so if I'm going that far might as well bite the bullet and have new seats fitted.
26th Apr 2015 8:40 pm
Alphamale
Member Since: 28 May 2014
Location: Belfast
Posts: 496
Checked valve clearance
Following on from my compression test on my 4.4 V8 engine I got around to checking some of the valve clearances.
Only did those on bank 2 i.e. cylinders 5,6,7 & 8 but the results do not bode well and so I am planning to take the heads off and have them reworked.
Exhaust...........0.28 and 0.28.....0.30 and 0.30......0.21 and 0.12.....0.17 and 0.17
Inlet.............<0.05 and <0.05...<0.05 and <0.05..0.17 and 0.16....0.17 and 0.13
Given that the clearances tolerances should be Ex. 0.23 - 0.27 and
..................................................................In. 0.18 - 0.22
Not one of the valves is at the correct clearance and the cylinders with the lowest compression readings were 5 and 6 which also have the worst valve clearances. Given that the compression results for the other bank was not just as bad I would not expect the same bad results, never the less I will get both heads reworked and maybe have hardened seats fitted in the exhaust ports because of the LPG. Now just need to set a day to do the strip down.
3rd May 2015 11:45 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
Ouch - very low clearances.
Perhaps a friendly mod could merge this with your previous threads, just to keep the information together?
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