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displaying posts 1 to 25 of 25
| Author | Subject: Cleaning the tops of pistons |
 gti6girl
Seasoned Pro  Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #1
Took the spark plugs out of the rallye as we are having a little trouble starting it as it has not moved for a few months and notice a bit of shit on the tops of the pistons. Is there any way to remove this while the engine is still together?cheers |
 Posted 14th Feb 2010 at 23:18
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mr swampy s16
**BAD SELLER**  Location: out and about Registered: 22 Oct 2003 Posts: 10,550 Status: Offline |
Post #2
Pour some redex down the hole.Leave for half an hour, cover the plug holes with rags and crank the engine over. Refit the plugs and start the engine. Will be alot of smoketand crap out the back but it soon goes. Its what we used to do on the old a series and pinto engines to de coke them |
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Posted 15th Feb 2010 at 01:06
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #3
And that will be fine to do on my |
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Posted 15th Feb 2010 at 02:21
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t0mt0m
Regular  Location: Truro Registered: 18 Jan 2010 Posts: 495 Status: Offline |
Post #4
gti6girl wrote: And that will be fine to do on my
________________________________________ 1997 Diablo Red 1.6 xs! crashed and scrapped!1998 Nile blue Gti 6 1999 Yamaha R6! maybe for sale soonish still in two minds! |
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Posted 15th Feb 2010 at 02:50
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fletch
Track Head  Location: The nearest Shell garage Registered: 12 Jun 2004 Posts: 12,273 Status: Offline |
Post #5
Bloody hell |
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Posted 15th Feb 2010 at 03:12
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chrisd306
Seasoned Pro  Location: Perth Scotland Registered: 26 Nov 2005 Posts: 10,061 Status: Offline |
Post #6
is it your rallye in performance french car?________________________________________ In my garage just now2003 BMW M3 & 2009 L200 Raging Bull & Audi Q5 S Line AX stock rod & Saxo Stock rod Sold the bike an charged rallye an bought a caravan, midlife crisis or what! |
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Posted 15th Feb 2010 at 03:13
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mabgti
NV motors  Location: Bham tunnel @7400rpm Registered: 28 Aug 2003 Posts: 9,127 Status: Offline |
Post #7
that the touring car engine that was at usc?________________________________________ Team Supercharged Gti-6NV Motorsport Automotive Performance Tuning 0121 448 7515 ECU Remapping/ DPF removal VAG/BMW Diag and Option Coding Peugeot Planet ECU coding/transponder programming etc www.nvmotorsport.com Facebook Page Project S6 |
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Posted 15th Feb 2010 at 03:19
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jeffers
Forum Admin Location: Leeds Registered: 14 Dec 2003 Posts: 3,702 Status: Offline |
Post #8
mabgti wrote: that the touring car engine that was at usc? I believe it will be, ex works engine IIRC.....  ________________________________________ Team Running Engine again!Team Negative Camber! My Budget track engine build thread! Now appearing at a Trackday near you!!  |
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Posted 15th Feb 2010 at 03:25
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chrisd306
Seasoned Pro Location: Perth Scotland Registered: 26 Nov 2005 Posts: 10,061 Status: Offline |
Post #9
theers a mint 205 Rallye in french car this month, 274bhp longmans gti6 engine on bodies, looks good.________________________________________ In my garage just now2003 BMW M3 & 2009 L200 Raging Bull & Audi Q5 S Line AX stock rod & Saxo Stock rod Sold the bike an charged rallye an bought a caravan, midlife crisis or what! |
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Posted 15th Feb 2010 at 03:42
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #10
Yes that's ours.It's just like black deposits but it looks quite thick the engines were 12.5k back in the day and you can't get a car for less the around 15k |
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Posted 15th Feb 2010 at 04:02
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fletch
Track Head Location: The nearest Shell garage Registered: 12 Jun 2004 Posts: 12,273 Status: Offline |
Post #11
Carbon deposits then, you running the correct plugs? |
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Posted 15th Feb 2010 at 04:21
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #12
Indeed, I just want to know if there is a way of getting it off |
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Posted 15th Feb 2010 at 04:23
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rikky
🦔 Location: cheshire Registered: 28 Feb 2004 Posts: 26,796 Status: Offline |
Post #13
redex________________________________________ 306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges gti6 inlet manifold badges | 306 rear boot badges (p2/p3) winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club] |
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Posted 15th Feb 2010 at 05:14
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adam b
Seasoned Pro  Location: The Nam Registered: 24 Jan 2006 Posts: 12,828 Status: Offline |
Post #14
sounds like its running too rich when cold, wouldnt bother trying to clean anything as you're likely to get crap down the side of the bores, last thing you want with and engine that expensive.________________________________________ Nothing to see here |
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Posted 15th Feb 2010 at 05:34
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #15
well we did not map it at -1 and thats what it is here so maybe that has something to do with it, the plugs do get wet very quickly and i never had this problem all though 2009 show season |
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Posted 15th Feb 2010 at 11:43
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pete_rallye
Seasoned Pro  Location: Yorkshire Registered: 12 Dec 2002 Posts: 5,253 Status: Offline |
Post #16
Just thrash the bo***cks off it. These engines get carbon'd up very quickly if left idling or driven normally. They run really rich, especially when its cold. You need to give em a good thrashing to burn all the carbon off. Not sure why but Mr Longman seems to map them this way, must be a reason for it. I used to have to clean my plugs to get it to start after it was run for a short period especially during the cold weather. The plugs don't help either mind.________________________________________ Oulton Park in a BTCC 306 vid 1Oulton Park in a BTCC 306 vid 2 Lap of the 'ring |
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Posted 15th Feb 2010 at 13:00
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daveyboy
aka Jim Davey  Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #17
pete_rallye wrote: Just thrash the bo***cks off it. These engines get carbon'd up very quickly if left idling or driven normally. They run really rich, especially when its cold. You need to give em a good thrashing to burn all the carbon off. Not sure why but Mr Longman seems to map them this way, must be a reason for it. I used to have to clean my plugs to get it to start after it was run for a short period especially during the cold weather. The plugs don't help either mind. I was going to suggest you stop driving like a girl but looks like somone beat me to it...   ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 15th Feb 2010 at 13:07
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #18
daveyboy wrote: pete_rallye wrote: Just thrash the bo***cks off it. These engines get carbon'd up very quickly if left idling or driven normally. They run really rich, especially when its cold. You need to give em a good thrashing to burn all the carbon off. Not sure why but Mr Longman seems to map them this way, must be a reason for it. I used to have to clean my plugs to get it to start after it was run for a short period especially during the cold weather. The plugs don't help either mind. I was going to suggest you stop driving like a girl but looks like somone beat me to it... As far as I'm led to believe, Longmans used to live map their cars on the road? Would there be any benefit in having a mapping session on a rolling road? If it is running too rich at lower RPM could this not be likely to cause bore wash and premature wear? Even if they leaned off the low speed running settings a little it might help? Do you have an AFR guage in the car? ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 15th Feb 2010 at 15:54
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #19
No. The car does get thrashed but is off the road for the winter. We have just fixed our charging problem and was just having difficulty starting it up. When it's back on the road we will take it for a spin |
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Posted 15th Feb 2010 at 18:25
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ryangti6
Seasoned Pro  Location: Pontypool Registered: 01 Sep 2006 Posts: 1,839 Status: Offline |
Post #20
What did the actual plugs look like then? I would go off these as an indication to how its running rather than the colour of the piston tops.If the plugs look fine then all should be good cumbustion wise surely. ________________________________________ Ryan |
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Posted 15th Feb 2010 at 21:17
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pete_rallye
Seasoned Pro Location: Yorkshire Registered: 12 Dec 2002 Posts: 5,253 Status: Offline |
Post #21
The difficulty you're having starting it is because the map chucks in loads of fuel when its cold.The race plugs don't like this, it f*cks them pretty quick. You need to either start it on standard plugs and get it warmed up, or my preferred method is to blow torch the race plugs then put them in whilst there hot and start it up. Don't keep trying to start it, it'll backfire lots and you'll kill the plugs.Yes the running rich at low rpm can cause bore wash and usually the oil stinks of petrol after not long. Its usually just on start up it causes a problem though. Its because the air speed with the throttle bodies on turnover is so low you need a lots of fuel to get it into the cylinders. Usually though you start it and hold it at about 2.5k rpm to get it up to temp. Bare in mind it is a race engine and not really designed for everyday use. Oh, I also fitted a diesel starter which improved things considerably. ________________________________________ Oulton Park in a BTCC 306 vid 1Oulton Park in a BTCC 306 vid 2 Lap of the 'ring |
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Posted 15th Feb 2010 at 21:37
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gti6girl
Seasoned Pro Location: Dartford Registered: 19 Feb 2007 Posts: 2,692 Status: Offline |
Post #22
Thanks pete. The plugs are like new just wet and when dried just get wet very quickly. Think I might get some standard plugs then thanks for the help |
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Posted 16th Feb 2010 at 03:50
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daveyboy
aka Jim Davey Location: Southampton Registered: 01 Oct 2007 Posts: 8,648 Status: Offline |
Post #23
pete_rallye wrote: The difficulty you're having starting it is because the map chucks in loads of fuel when its cold.The race plugs don't like this, it f*cks them pretty quick. You need to either start it on standard plugs and get it warmed up, or my preferred method is to blow torch the race plugs then put them in whilst there hot and start it up. Don't keep trying to start it, it'll backfire lots and you'll kill the plugs. Yes the running rich at low rpm can cause bore wash and usually the oil stinks of petrol after not long. Its usually just on start up it causes a problem though. Its because the air speed with the throttle bodies on turnover is so low you need a lots of fuel to get it into the cylinders. Usually though you start it and hold it at about 2.5k rpm to get it up to temp. Bare in mind it is a race engine and not really designed for everyday use. Oh, I also fitted a diesel starter which improved things considerably. I know when we start the classic Formula 2 (Tuned 2 litre 16 Toyota engines mostly) you have to keep revving them up and down up to 2.5K or so to a keep the oil splash going to lube the cams, but also to warm them through faster as they foul up very soon if left to idle for more than a few seconds. Is your map adjustable? ie. can you turn down the cranking enrichment a little? You will know if you have gone too far leaning of the idling mixture as it will start to spit and splutter. ________________________________________ R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.Some of my services: (See my for sale threads) Engine mount/chassis repair Solid Beam Mounts BACK IN PRODUCTION Harness bars |
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Posted 16th Feb 2010 at 22:42
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pete_rallye
Seasoned Pro Location: Yorkshire Registered: 12 Dec 2002 Posts: 5,253 Status: Offline |
Post #24
The map will have a compensation map to account for cold air/coolant temps, maybe it compensates too much?! I guess you could get into the map and change it but I know Longmans lock their ecu's so you cannot alter them.I know Sandy likes to run the bodies upside down to try and stop the fuel dropping out of the air, not sure if this would also help with the start up but guess it might do? Actually he usually also runs 8 injectors, so will probably use the ones in the normal position for starting as their nice and close to the valves. ________________________________________ Oulton Park in a BTCC 306 vid 1Oulton Park in a BTCC 306 vid 2 Lap of the 'ring |
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Posted 17th Feb 2010 at 03:16
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sandy
Junior User  Location: Truro Registered: 02 Oct 2005 Posts: 70 Status: Offline |
Post #25
It's an oddity of Engine Dyno mapped engines, that part throttle etc is usually rich when fitted in the car. Possibly the case here. I've never figured out why, but the map should be checked in the car anyway if you want it to be right, even then what you see in the rollers will be slightly different to out on the road/track! |
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Posted 10th Mar 2010 at 12:19
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