Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Chris1573 wrote:
Hi gstuart, thank you for the kind offer and if I was in Kent and not Gloucestershire I would certainly take you up on it
Took the throttle body off today...
The mainfold was also pretty gunked up so I carefully scraped out as much as I could without knocking any bits down the cylinder ports.
Since the EGRs were recently done I am guessing that the failed ones may have contributed to the build up. Or perhaps this is just what you see after 80k miles.
Either way it feels like the engine is sweeter and a bit more responsive and no fault codes yet.
No probs , funny enough my brother lives in Glos
Blimey that does look full that’s for sure , awesome it’s better , alas I’m waiting for a new iAT and some nice weather before I start mine , hands up I’ve not cleaned my map sensor going on 2 x years plus
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
aja4x4 wrote:
I have removed nearly 1kg from two blocked manifolds
Oh wow, that must be the record , plus ur a braver man than me removing the inlets , by the looks of it that’s at least a full weekends work
Bet there was a dramatic difference, particularly down the motorway
Hats off to u mate
14th Dec 2021 9:53 pm
aja4x4
Member Since: 14 Apr 2019
Location: Westbury
Posts: 2459
I have only removed manifolds from Discovery 4's and its about a days work to replace both.
The engine with the soot build up had just been in to a main dealer with a knocking noise and they had replaced four cams, lifters, followers and timing chains but somehow missed the really heavy blocked manifolds and didnt cure the knocking noise.Andrew
D3 2.7tdv6 2005
D4 3.0 SDV6 Commercial died and gone to LR heaven
D5 3.0 SDV6 HSE
14th Dec 2021 11:22 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13635
Extremely impressed doing them in a day, at the rate I work at would take me a week
Must admit and I imagine ur the same, really annoying when things like that could have been done but was ignored by the dealer
Always useto find that at work where some of the gas engineers never took pride in the work , including trying to restrict recalls to a minimum by looking for any possible future issues and simply advising the customer of them
15th Dec 2021 2:38 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
So had the code again today was coming up a long and steep dual carriage way giving it some welly. Seemed to pull fine all the way up but after letting my foot off at the top and then putting it down again it was flat no power… smoke test next to see if there any leaks I guess…
5th Feb 2022 9:33 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
Add some VVT cleaner or similar in the tank and see if that helps.
You did have a very gunked up intake system so the exhaust side at the turbo vanes might also be.yµ (idµ - eAµ) ψ=mψ
5th Feb 2022 9:40 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Thanks Prof, yep I am thinking the variable vanes in the turbo might well be the issue, however before I jump into a turbo removal I am going to make sure everything else is spot on so no leaks etc.
I am a bit sceptical of additives doing anything useful, however willing to give it a try. What would you recommend ?
6th Feb 2022 12:12 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
I use a product called Diptane which I add to the tank every time I fill up, and it seems to do a good job of keeping everything clean. Since you might already have a build up of crud you could try something like Wynns VVT cleaner.
I've never used it personally but others on here give it the thumbs up.
It may need more than one dose though, but either way make sure your actuator rod is free, and skip the turbo removal idea until you have confirmed failure.
It's a dratsab of a job!! yµ (idµ - eAµ) ψ=mψ
6th Feb 2022 1:07 am
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
Hi Prof, yep wynns is the one I have heard of. No plans to replace the turbo quite yet, and if I did it would probably be a good time to do a body off and get all those other jobs done that are sooo much easier when it’s off.
6th Feb 2022 1:12 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
Body off is not really all that helpful for turbo removal unless you can raise the chassis separately, but it does give you access for everything else. yµ (idµ - eAµ) ψ=mψ
6th Feb 2022 1:25 am
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
OK so I took a look today, actuator moved freely with no notichness or tight spots. (gave it some oil anyway). I then took the throttle body off as I could see some oily deposits around where the "Y" goes into the Drivers side Manifold, the Rubber gasket was deformed from when I last put it back in so was leaking. The gasket has turned into rubber putty so time to replace both.
Hoping this is it. So fingers crossed.
6th Feb 2022 2:50 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
It's a common enough leak point, check the MAP sensor again too just in case it's clogged up again.
You have a heavy build up of crud in those manifolds which even when removed is not all that easy to get completely clean.yµ (idµ - eAµ) ψ=mψ
6th Feb 2022 3:08 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
OK so leak fixed.
Started up and engine was lumpy and threw this fault code. Reset the code and it improved a bit bu was still not right and the RPMs would stumble every few seconds. Not sure if having had it all apart and sprayed cleaner on the MAF sensors in the airbox outlet and the throttle body as well as the MAP sensor would have upset things. However as it warmed up the rough idle subsided. Took if to for a spin and pulls well no smoke and no faults.
I did run some live values on the EGRs and they seem to behave as expected. However the values for the "EGR Throttle Command & Position" did not change at all (never checked them before), stayed the same 5% / 14% whether at idle or full throttle. Should these change ? I assumed it would be the butterfly valve in the throttle body that these represent....?
If that valve has failed I guess it could account for an EGR related issue...
8th Feb 2022 8:19 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4651
Yeah they should change but it's likely they're gummed up. Not worth doing anything with them in terms of repair as the motor bearings will likely be shot as well.yµ (idµ - eAµ) ψ=mψ
8th Feb 2022 8:29 pm
Chris1573
Member Since: 12 Feb 2021
Location: Stroud
Posts: 196
I did take a look at the butterfly valve and it moved smoothly when I pushed it. Guess it may the stepper motor that control it is fried…
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