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break-in of a new engine?

 
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Malte
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Joined: 11 Dec 2007
Posts: 534
Location: Germany

PostPosted: Wed Nov 12, 2008 1:48 pm    Post subject: break-in of a new engine? Reply with quote

how do you break-in / run-in a new engine or an engine with new barrels and pistons ?

i've heard a lot of things and i'm not really shure about what is true and what not.

- first start: let your engine run 10 minutes in 2000-2500 rpm

- first 1000 km max rpm = 4000
run in different rpm's.

-first oil-change after 500 - 1000 km ? or 50 ? or 100 ?

- drive smooth for another 2000-3000 km ?!

i've heard that the first km / minutes are the most important for the engine because 80 % of material which has to be grinded off will be grinded off then.

some people say that the first time you start the engine should be the time for the first ride with the engine, otherwise the new piston rings will grind in wrong.

i'm just builing up a new engine and don't want to fuck it in the first 10 minutes.
so your experience and knowledge would help me a lot!

thanks for a lot of answers! :)
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Bart
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Location: Södertälje

PostPosted: Wed Nov 12, 2008 4:16 pm    Post subject: Reply with quote

I wouldn't really know either, but I'm very interested to heard what specialists say.

5 years ago I built an engine with good bits I got given from various friends. To run it in, I just ran it below ~4000RPM with normail oil for the first 1000km. Than changed the oil and that was it, still going strong about 30000km so far.
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silc
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Joined: 31 Aug 2008
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Location: Montpellier

PostPosted: Wed Nov 12, 2008 6:12 pm    Post subject: Reply with quote

Yes that's the same for me... as soon as the gear box is finished I'll build a new engine. I'm very interesting in the responds on this topic! Very Happy

- Tom Sawyer
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JoZeF
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Joined: 25 May 2007
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PostPosted: Wed Nov 12, 2008 7:55 pm    Post subject: Reply with quote

stolen here :

www.citroentuning.de

Quote:
How to break in engines
Oil circuit priming:
Make sure that your car battery is well charged.
Before you start, your engine must be pre-lubricated; to achieve this, the oil circuit
must be primed. Remove the plugs or spark plugs. Give a few squirt of engine oil in
the cylinder trough the spark plug bore. Disconnect the positive wire from the coil.
(When you have the STP thermostatically controlled oil cooling system, remove the
hollow bolt and the thermostat sandwich plate).
Fill the engine with a minimum of 2 litres of engine oil or break-in oil, remove the oil
filter, and fill it with oil (approx. 0,5 Lt.).
Let the starter drive your engine up to the moment oil come out of the oil filter
bracket. Then stop and rebolt your filled oil filter.
Continue to turn your engine with the starter up to the moment the oil pressure
light (idiot light) is off. Turn ignition key back and soon on to see what do the oil
pressure light. When it come on after just 1 or 2 second, repeat the procedure so
often as necessary up to the moment that after switching off the starter the light
come on after 5 or more seconds .
Your engine oil circuit is now primed and no air (or a little) is present in the oil
circuit.
Bolt in your sparks, start your engine and let it run for 15 minutes at 3.500 RPM.
This way your cam and followers are break in to 80 %. The last 20 % are done by
moving your engine in daily driving.
For customers having the STP thermostatically controlled oil cooling system:
Remove your oil filter, bolt on the thermostat sandwich plate with his hollow bolt,
rebolt the oil filter and start your engine and let it run at idle or with 1.500 to 2.000
RPM for a few minutes. This will purge your oil lines and oil cooler. Stop the engine
and fill oil to maximum level.
Now your must break in your engine on a road or highway:
This can easily be done following this procedure.
Look for a road that allow you to do the following: For fast and safe break in of
pistons, rings and cylinder we recommend to accelerate your car with floored
accelerator from 40 Km/hr in the greatest gear (Fourth or fifth gear) to maximum
speed the engine will reach. Never force the engine to rev up more than it´s
willing to do ! Reaching the speed of around 90/100 Km/H remove your foot and let
the car (without disengaging the gear or clutch) decelerate and slow down to
approx. 40 Km/hr. Then reaccelerate with flooring your accelerator to repeat this.
Do that 15 times and drive 50 Km “normally”.
When accomplished your engine is really break in to 80%. The last 20% of engine
break in is done during daily driving but don’t force your engine to RPM levels that
it will not reach or too high RPM or to high load with a long gear during hills
climbing!
Don’t forget to change your oil filter and engine oil after 50 Km!
When above is done, drive your engine daily normally for the next 3 to 5000 Km.
Follow the manufacturer recommendations for breaking in.
Don’t forget oil and filter change after 1.000 Km and check your valve lash.
After this second oil change, drive your engine as usual.
Next oil and filter change after 3.000 Km, then all 5.000 Km.

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Malte
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Location: Germany

PostPosted: Wed Nov 12, 2008 9:44 pm    Post subject: Reply with quote

because of that guide i started this topic. :)

i'm not shure if i should believe that...
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JoZeF
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Joined: 25 May 2007
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PostPosted: Wed Nov 12, 2008 9:56 pm    Post subject: Reply with quote

Well from what I've talked about with him, and despite the reputation he has, He is probably one of the most knowledgeable guys in 602 tuning, I guess his advice is worth something...
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Malte
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Location: Germany

PostPosted: Thu Nov 13, 2008 1:12 pm    Post subject: Reply with quote

yes off course, he has got a lot of experience.

but does anybody got a logical explanation for this run-in method?

citroen also has got a lot of experience, why don't they do it like that?
or do they?
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JoZeF
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Joined: 25 May 2007
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PostPosted: Thu Nov 13, 2008 1:19 pm    Post subject: Reply with quote

maybe they gave the car to you at this point :

Quote:
When above is done, drive your engine daily normally for the next 3 to 5000 Km.
Follow the manufacturer recommendations for breaking in.
Don’t forget oil and filter change after 1.000 Km and check your valve lash.
After this second oil change, drive your engine as usual.
Next oil and filter change after 3.000 Km, then all 5.000 Km.


modern car engines are already broken in... no idea how they do it but it might be something similar to this guys advice.
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