Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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I will soon have my car back and because I rebuilt the engine it will obviously require running in. However I have heard different peoples views on how to do this.
I recently read an article on hard running in and how you can get much better horsepower and reliability by effectively giving the engine some beans within the first 20 miles!
Heres the article if you wanna read any of it: Hard Running In
What do you reckon? stick to the good old way of gentle running in or try this method?
Corsa C Z20Let
Black Sleeper Turbo Project
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Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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There is a thread on mig, that is about 8million pages long on running in.
It gives me a headache and i hope i never have to do it 
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Marc
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Registered: 11th Aug 02
Location: York
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Id slowly run it in and gradually increase the rev's as you rack up the mile's. Don't take it above 3k for the first 100m for example.
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Edd
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Registered: 8th Nov 04
Location: Glasgow
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take it for a gentle run warm up everything then go give it a blast through the gears do this daily
i have no idea if this is good
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ed
Member
Registered: 10th Sep 03
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So many different views. Some people say you don't need to run an engine in. Others will drive 10,000 miles without going over 900rpm.
You want to use the full rev range of the engine so you get an equal ammount of polishing and scraping from the piston rings. Revs too low and you will polish the bores, revs too high and you will scrape the bores too much. However, I'm sure in modern engines you don't need to worry about this because of the modern methods of honing.
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Marc
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Registered: 11th Aug 02
Location: York
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^
Don't do that!!
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Rileysport
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Registered: 18th Jun 04
Location: West Yorkshire
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ask muppetsport
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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But the article says how the rings get beded in better with hard revs straight away.
Corsa C Z20Let
Black Sleeper Turbo Project
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Marc
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Registered: 11th Aug 02
Location: York
User status: Offline
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quote:
Originally posted by ed
So many different views. Some people say you don't need to run an engine in. Others will drive 10,000 miles without going over 900rpm.
You want to use the full rev range of the engine so you get an equal ammount of polishing and scraping from the piston rings. Revs too low and you will polish the bores, revs too high and you will scrape the bores too much. However, I'm sure in modern engines you don't need to worry about this because of the modern methods of honing.
An engine is'nt truely run in till around 10,000m, but as this is a rebuild I'd run it in over a 1000m period.
My dad's mate has just bought a Focus St, he was told by the dealer that they no longer need running in as it's done at the factory! I'd still run it in though!!
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Rileysport
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Registered: 18th Jun 04
Location: West Yorkshire
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iirc the trick to running in is varied rpm and load avoiding W.O.T, don't forget the oil change intervals too, you'll need fresh after 50 miles 
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Paul_J
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Registered: 6th Jun 02
Location: London
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Just nail it Rory. If you fuck it up - take it apart again 
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willay
Moderator
Organiser: South East, National Events
Premium Member
Registered: 10th Nov 02
Location: Roydon, Essex
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i'm currently running in mine.
First 250-300 miles will be under 3000rpm,
change oil and filter at 100 miles
change oil and filter at 250/300 miles
after that revving up to 4k, not sure after that
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Rileysport
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Registered: 18th Jun 04
Location: West Yorkshire
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all you tarts and running in 
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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this is why I like the idea of this hard running in, i just wanna cane it straight away!
Corsa C Z20Let
Black Sleeper Turbo Project
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ed
Member
Registered: 10th Sep 03
User status: Offline
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quote:
Originally posted by Flat4
quote:
Originally posted by ed
So many different views. Some people say you don't need to run an engine in. Others will drive 10,000 miles without going over 900rpm.
You want to use the full rev range of the engine so you get an equal ammount of polishing and scraping from the piston rings. Revs too low and you will polish the bores, revs too high and you will scrape the bores too much. However, I'm sure in modern engines you don't need to worry about this because of the modern methods of honing.
An engine is'nt truely run in till around 10,000m, but as this is a rebuild I'd run it in over a 1000m period.
My dad's mate has just bought a Focus St, he was told by the dealer that they no longer need running in as it's done at the factory! I'd still run it in though!!
He'll clog the engine with carbon and other gunk then. THe engine is fully run in at the factory. We get engines from Ford that are brand new, put on the bench and sat at 5000rpm for a month to see if they break. You strip one of them and it looks brand new inside.
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Sly_SRi
Premium Member
Registered: 9th Apr 04
Location: Reading, UK Drives: Corsa C
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Yea, I can understand newer engines with much better machined parts and smaller tolerances but what about with my 13 year old c20xe??
Corsa C Z20Let
Black Sleeper Turbo Project
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ed
Member
Registered: 10th Sep 03
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That's still classed as a modern engine. What are you doing to it?
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Ojc
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Registered: 14th Nov 00
Location: Reading: Drives : Clio 197
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Run it in for the first 500 miles, don't rag it otherwise it will spend another 6 months down Lee's
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Corsa E-Tec
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Registered: 4th Feb 04
Location: Stevenage Drives: Leon Cupra
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have you changed the internals then will?
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willay
Moderator
Organiser: South East, National Events
Premium Member
Registered: 10th Nov 02
Location: Roydon, Essex
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yeah, bottom end shells or some shite.
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Rileysport
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Registered: 18th Jun 04
Location: West Yorkshire
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Shells don't need running in, rings do
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Jake
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Registered: 24th Jan 05
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u2u muppetsport, he ran his in pretty cheaply.
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Corsa E-Tec
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Registered: 4th Feb 04
Location: Stevenage Drives: Leon Cupra
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well done willay.
good luck on running in the engine.
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starkmotorsport
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Registered: 27th Apr 02
Location: Scotland
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1000 miles run in at varying rpm, nothing silly though. Preferably on a dyno but otherwise "sensibly" on back roads and not 5min journeys to the shops - decent long runs.
Take it up to its limit once your happy with how its running, but I wouldnt advise doing this straight away.
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willay
Moderator
Organiser: South East, National Events
Premium Member
Registered: 10th Nov 02
Location: Roydon, Essex
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quote:
Originally posted by Rileysport
Shells don't need running in, rings do
thats probably it, I wanted to replace quite alot of the engine to ensure it doesnt fuck up due to oldage, leaks however... 
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