MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: ReflexRob on February 05, 2016, 12:47:55 pm
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I've an 05 AXX GTi with 55k on the clock and lumpy idle.
The EGR valve and gasket was changed (but not check valve pipe at rear yet) which made no difference.
The cam follower has been changed but wasn't in a bad way anyway and the cam is not scored.
I don't really want to strip loads of stuff apart to see if there is any carbon deposits that need cleaning if I can get a peek at one or more valves.......
If anyone can help it would be greatly appreciated - this plus the cam chain tensioner rattle is really spoiling my ownership experience at the moment!
Cheers
Rob
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all our gti tfsi engines will have carbon build up tbh with you and from all the reading up I've been doing on lumpy idle.
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If you can get a boroscope into the inlet manifold thats one way To have a look
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Cheers chaps
I appreciate they will all have carbon but I suspect the idle will be lumpy when the build up gets really bad. The idle could also be something like vacuum lines though and I don't want to start chasing money around if I can avoid it by getting it right first time.
I do have a boreoscope so I will try that thanks - where is a good insertion point?
Cheers
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Only access is through the hole for the IAT sensor if the camera is small enough
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Only access is through the hole for the IAT sensor if the camera is small enough
Did you manage to buy another boroscipe Dan?
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I've not got round to it yet
Another way in could be through the PCV connection on the right hand side, but then you're at 90 degrees to the valves which makes it a little more tricky
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I've not got round to it yet
Another way in could be through the PCV connection on the right hand side, but then you're at 90 degrees to the valves which makes it a little more tricky
I'm. going to what the guys at my new workplace have if and when I get there. Hoping 15th February.
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Have a look at 4:34 of this vid I made. I got in through the IAT sensor hole, and used a cheap borescope from Amazon that connects to your android phone/tablet.
Sent from my iPhone using Tapatalk
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Only access is through the hole for the IAT sensor if the camera is small enough
Having wasted my time/money on a sump drop to change the oil pickup (a kind of good news I guess?) I'm planning to boroscope my inlets before dismantling to clean, if possible!
Please, where is the IAT sensor?
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Definitely good news and worth doing for peace of mind!
IAT sensor is right in the middle/top of the plastic inlet manifold, closest sensor to the middle/front of the inlet manifold when stood in front of the car. Single torx bit holding it in.
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Cheapest way to inspect the intake valves is a bore-scope.
My valves and guides looked like this prior to cleaning:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1205.photobucket.com%2Falbums%2Fbb434%2Frohecht%2Fdumb%2520forum%2520stuff%2F18d0afe4-5ced-493e-99b1-1cf7630b11b4.jpg&hash=e93fd724be170a1c7d00b6c292fb4c9c833fa9e7) (http://s1205.photobucket.com/user/rohecht/media/dumb%20forum%20stuff/18d0afe4-5ced-493e-99b1-1cf7630b11b4.jpg.html)
Like this after cleaning with 1 part spirits to 4 parts petrol doing my own blow-by method through the IAT sensor on the intake mani:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1205.photobucket.com%2Falbums%2Fbb434%2Frohecht%2Fdumb%2520forum%2520stuff%2F76d465d0-b48f-4710-959f-5e5869e7e0d2.jpg&hash=19145449d7e3fba5d45a3ecc3b95db384e49fa3c) (http://s1205.photobucket.com/user/rohecht/media/dumb%20forum%20stuff/76d465d0-b48f-4710-959f-5e5869e7e0d2.jpg.html)
The best results come from a media blast or manual scraping...but you can see the majority of deposits fell off with the blow-by.
This vid I made shows your access for the bore-scope...but disregard the audio description of the ratio of the solution, should one choose to clean this way, as I find it better to use 1-part spirits to 4-parts petrol.
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Thanks for that.
I see your location as Pacific NW. US/Canada? A fantastic part of the world- I worked for Canadian Pacific years ago...
So I guess you have to run some sort of Cat then?
Great idea, and thanx for the vid...but where does all the sh1t go? I was hoping to see some vid of your exhaust outlet!!!
I am concerned as to what damage a solvent wash might do to my 3" Miltek sparts cat (bloody expensive!). Anyone got any thoughts on this? Normally, I would worry about missfires, or a tow/bump start putting contaminating matrix by putting large quantities of unburnt fuel thru...
Q. Is your mineral spirit what we in UK would call white spirit, also known as turpentine substitute?
I think we would have problems getting hold of Naptha here too, but looks like your not currently using that?
How often do you do this?
Cat been tested for emmissions since?
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That is a significant improvement visually!
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Thanks for that.
I see your location as Pacific NW. US/Canada? A fantastic part of the world- I worked for Canadian Pacific years ago...
So I guess you have to run some sort of Cat then?
Great idea, and thanx for the vid...but where does all the sh1t go? I was hoping to see some vid of your exhaust outlet!!!
I am concerned as to what damage a solvent wash might do to my 3" Miltek sparts cat (bloody expensive!). Anyone got any thoughts on this? Normally, I would worry about missfires, or a tow/bump start putting contaminating matrix by putting large quantities of unburnt fuel thru...
Q. Is your mineral spirit what we in UK would call white spirit, also known as turpentine substitute?
I think we would have problems getting hold of Naptha here too, but looks like your not currently using that?
How often do you do this?
Cat been tested for emmissions since?
I'm catless, but just done so recently, and there is no emission testing for our area. Had a 400cell cat before when I first started doing this. No, nothing was wrong with the cat requiring removal...I just removed it because "race fuel" that is leaded is half the cost of unleaded.
It's carbon and should pass just as it would when it eventually falls from the valve stems naturally. Additionally, the catalyst can heat up to 1200°F and is designed to burn pollutants. White spirits is same as mineral spirits.
I found the cleaning is not needed often if engine is tight...obviously, build-up will develop more often if valve stem guides are worn or if more is recycled through the intake air.
I think I first needed to do this, checking with the bore-scope, at about 70k miles. If you see build-up returning often...then it's likely time to address the cause rather than the effect.
Here's a vid of the Fleming Product; BG44K injection cleaning...I looked up their MSDS and found the product is roughly 25% spirits and 75% fuel(petrol).
...this shop states that some is added to the fuel tank, but we know that does nothing for our valves...on direct injected systems it only works for cleaning injectors.
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My ED30 is on 67k and is slightly lumpy on idle.
I'm taking it on a 320 mile round trip to Alex at AKS to have the inlet valves cleaned properly - no messing around!
Rich
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Cheapest way to inspect the intake valves is a bore-scope.
My valves and guides looked like this prior to cleaning:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1205.photobucket.com%2Falbums%2Fbb434%2Frohecht%2Fdumb%2520forum%2520stuff%2F18d0afe4-5ced-493e-99b1-1cf7630b11b4.jpg&hash=e93fd724be170a1c7d00b6c292fb4c9c833fa9e7) (http://s1205.photobucket.com/user/rohecht/media/dumb%20forum%20stuff/18d0afe4-5ced-493e-99b1-1cf7630b11b4.jpg.html)
Like this after cleaning with 1 part spirits to 4 parts petrol doing my own blow-by method through the IAT sensor on the intake mani:
(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi1205.photobucket.com%2Falbums%2Fbb434%2Frohecht%2Fdumb%2520forum%2520stuff%2F76d465d0-b48f-4710-959f-5e5869e7e0d2.jpg&hash=19145449d7e3fba5d45a3ecc3b95db384e49fa3c) (http://s1205.photobucket.com/user/rohecht/media/dumb%20forum%20stuff/76d465d0-b48f-4710-959f-5e5869e7e0d2.jpg.html)
The best results come from a media blast or manual scraping...but you can see the majority of deposits fell off with the blow-by.
This vid I made shows your access for the bore-scope...but disregard the audio description of the ratio of the solution, should one choose to clean this way, as I find it better to use 1-part spirits to 4-parts petrol.
That's yuk ROH ECHT I bet most of out gti's have this in out cylinder heads. I'm going to try and give it a shot of something this year and see if it helps. will buy a bore scope and then go with the petrol and spirit me this and see if this helps. :drinking:
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There are some products, for direct injection valve cleaning, in a spray can that are made for spraying into the throttle body. You could just use one of those if you choose, rather than using the pressure sprayer, but you can spray it into the IAT hole instead because easier than separating the TB hose from the TB. You'll want to seal the gap between the tiny straw and the IAT hole so it runs better. Then when it's done, you'll have a CEL, but it will clear itself...if for some reason it does not...you can have it cleared. Don't forget to have the engine warmed up to running temps before beginning. :happy2:
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I was also thinking Mr muscle oven degreaser. used it on my tt a few years back just try it out as it was recommended by a friend who modifies cars for fun and it's really good stuff for degreasing. :happy2:
Thanks for the advise ROH ECHT I probably would go through there as the TB would be a pain unlike the 1.8T. :drinking:
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My ED30 is on 67k and is slightly lumpy on idle.
I'm taking it on a 320 mile round trip to Alex at AKS to have the inlet valves cleaned properly - no messing around!
Rich
@richtung (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1475) I thought of doing the same on my 123k GTI - how much is it costing you?
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My ED30 is on 67k and is slightly lumpy on idle.
I'm taking it on a 320 mile round trip to Alex at AKS to have the inlet valves cleaned properly - no messing around!
Rich
@richtung (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1475) I thought of doing the same on my 123k GTI - how much is it costing you?
A couple of months ago it was around £320 I think with new injector seals, that was a manual clean. Alex said he was ordering a walnut gizmo so I don't know if he has that yet.
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The media blast is a lot less headache than a manual scrubbing for sure...and does the job nicely if you want the most thorough job done.
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My ED30 is on 67k and is slightly lumpy on idle.
I'm taking it on a 320 mile round trip to Alex at AKS to have the inlet valves cleaned properly - no messing around!
Rich
@richtung (http://www.mk5golfgti.co.uk/forum/index.php?action=profile;u=1475) I thought of doing the same on my 123k GTI - how much is it costing you?
AKS quoted me £352 all in with the media blasting - seems like a decent price for a job that is probably more effective than cleaning by hand.
Rich