gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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So many different veiws and everyone has their own opinion 
Im having new piston rings on my x16xe and it will need bedding in was just looking at what everyones different veiws are. If you have run an engine in how did you do it and how has it been since.
Im just looking for as many opinions as possible 
Thanks 
Drives supercharged Tec with torque  
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Robin
Premium Member
Registered: 7th Jan 04
Location: Northants Drives: Clio 182 Cup
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do 20 miles gently then do what you like TBH.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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But then the other veiw is completly the oposite, ie the first 20 miles are the most important and is where the full load should be put on the rings etc
Drives supercharged Tec with torque
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Limecat
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Registered: 25th Jun 05
Location: The Internet
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This is taken from www.guy-croft.com/viewtopic.php?t=78;
BREAK-IN PERIOD
Don’t be in a rush with this. The ideal break-in period is 500 miles road use, or 1.5-2 hrs dyno.
To achieve successful bedding-in of rings, the engine must be run under load, under no account left idling. To bed-in an engine with unproven mixture settings (carbs or injection) a rolling road session is recommended. Break-in with the wrong fuelling or ignition settings will damage the engine.
1. For the 200 miles do just local driving and do not exceed ½ throttle and 4500rpm. Use the gears very freely and at all costs avoid heavy load: ‘high-gear – low engine speed’. This will lead to heavy bearing load with low oil pump output. Stop from time to time and check the underbonnet region for leaks and problems. Make sure oil pressure and engine temp is OK and stop immediately at any sign of overheating. Test the engine response on a quiet local circular route void of traffic lights and congestion and don’t venture too far, as the engine jetting may be wildly wrong. Do periodic spark plug checks; the plugs should be pale brown to grey around the outer body of the plug with insulator nose pale brown to yellow-white. If the mixture is too lean the engine will overheat and if the mixture is very over-rich, severe piston ring and bearing damage may result. If the engine shows any sign of labouring switch off and recover the car by towing or trailer.
2. For the next 300 miles use throttle to 3/4 and speeds leading up to light load 5000 rpm. Avoid heavy load with high speed.
3. Do not attempt full-throttle runs until you have put post-break-in oil in the engine and changed the filter. (see engine data sheet)
Personally, I go with start the car, let it get upto temperature (if no oil temp gauge work on the basis it takes longer for the oil to get to temp than the water) then give it full lead boots to half its rev range, back off and let it idle down and repeat. Change the oil after 50 miles. I used crap 20/50s stuff from Kwik Save which is about 3p a gallon! 
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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Ok thanks
Anyone else?
Drives supercharged Tec with torque
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bieransri
Member
Registered: 13th Apr 06
Location: Kidsgrove, Staffordshire
User status: Offline
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http://www.mototuneusa.com/break_in_secrets.htm
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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quote:
Originally posted by bieransri
http://www.mototuneusa.com/break_in_secrets.htm
Yer thats the other method I was refering too. Anyone done one this way? As its pritty much the oposite to all of the others
Drives supercharged Tec with torque
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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I use the method above, fast running in is what most engine builders use on high performance engines. for best results book 1 hour dyno time at your local RR and let them do it on the dyno. they can adjust acceleration speeds and loads on the engine and run it in perfectly.
avoid running the engine softly for any longer than 15 mins (to check for leaks etc) as most of the 'bedding in' is done within the first hour of running.
[Edited on 13-11-2007 by Dave A]
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
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Hmm ive got a 50 mile journey to get the car home from where it is been rebuilt though 
Drives supercharged Tec with torque
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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use the road method that is writted on that site.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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aye will try to find somewhere to drive around first then, otherwise its straight on the motorway which I assume isnt good for that method
Drives supercharged Tec with torque
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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also why does it mention changing the oil after about 50 miles in most of the methods? Does it pick up a load of particals or something?
Drives supercharged Tec with torque
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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the ring bedding in procedure literally scrapes the peaks left on the bores after a hone away from the bores, 80% of these metal particles will come away during the first 50 miles/30 mins of driving.
get it under load ASAP after starup, accelerating hard, come off throttle and let it coast down the revs itself as this pushes the rings out against the boreswhich helps the bedding in procedure.
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gavin18787
Premium Member
Registered: 22nd Feb 05
Location: Basildon, Essex
User status: Offline
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Ok cheers I think the plan is to pick the car up from warren next weekend as he is the one doing the work. Then we will go out for about 50miles/30mins and then change the oil
Drives supercharged Tec with torque
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