|07-21-2010, 11:34 PM||#1|
Join Date: Dec 2007
Location: Madison, Wi
Engine Break In
Maybe I'm just search-dead?? What's the most popular method after a total rebuild?
I changed the oil after the initial start (still on the stands) after run up to fan on/off. Varying rpm from 1200 to 2000 periodically.
It now has ~ 400 miles on it. Mostly city with some small/short interstate/highway stretches at varying speeds.. Is there really any reason to avoid prolonged sustained (~75) highway driving at this point? Conversely, would I be better off putting my foot into it more? The engine seems "tight" and it (so far) appears that the mileage is lower than it was?? I'm wondering if it was so good before because of the slop???
1997 - SL2, barebones, 161k, Auto - Rebuild complete and.. burnt a valve 20k later Arrgh!
Purchased 114k 10/07
Added OEM CC
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|07-21-2010, 11:52 PM||#2|
Join Date: Sep 2008
Re: Engine Break In
Honestly I think its completely up to you how you treat it now. From what I know highway driving is good for the engine, as your running at a constant rpm. If you ran the car at a slower speed but with same rpm would it be much different?
I would say highway driving is the test to see if you put that engine back together properly good luck on what ever you do, just to be on the safe side I would wait till an experienced poster put his/her two cents in
|07-22-2010, 08:11 AM||#3|
Join Date: Jul 2003
Location: windsor ontario
2008 Astra XR
Re: Engine Break In
the breakin period is only a few hundred miles. the rings and valves have to set themselves. u need dhorts periods of low speed to higher speeds, not prolonged high speeds. the idea to get get the rings & valve hot at highe speeds then let them cool down at lower speeds.
u certainly did the correct thing by changing the oil & filter (i hope).
now drive the car as u wish.
72 Buick GS red
2008 Astra XR black 3dr
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