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Formerly known as Syzygy
Join Date: Mar 2008
Location: Calgary, AB
Posts: 4,420
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Top end break in
After a top end rebuild, should one treat the engine in a similar fashion to having a complete rebuild, or is this overkill? I know I should get a valve adjust and oil change in a few miles or so, but should I drive it any differently?
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04-02-2009, 05:33 AM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
Posts: 38,352
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You should drive your car gently for at least 500 miles.
Then do the valve adjust and oil change and all should be good. The 500 miles is important.
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- Peter |
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04-02-2009, 05:42 AM
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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,720
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By top end, do you mean new rings? The ring and cam break in (if you refreshed the cams) procedures would need to be followed. As the rings and cylinders get to know each other, they will add metal to the oil. I'd change the oil at 100 and 500. If you just did the heads, drive it normally.
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04-02-2009, 06:38 AM
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Air Medal or two
Join Date: Jul 2003
Location: cross roads
Posts: 14,078
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for ring seating you would not use syn oil, and not drive it gentle
A little search and you will see why the "gentle" thing is all wrong
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D troop 3/5 Air Cav,( Bastard CAV) and 162 Assult Helicopter Co- (Vultures) South of Saigon, U Minh Forest, Delta, and all parts in between |
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04-02-2009, 08:52 AM
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Formerly known as Syzygy
Join Date: Mar 2008
Location: Calgary, AB
Posts: 4,420
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Sorry, I guess I wasn't very clear. Heads off, valve and guides. Basically just a valve job. I know I should do a valve adjust and oil change after some miles, but do I need to baby it or not drive long distances, or drive like normal.
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04-02-2009, 02:46 PM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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Drive like normal.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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04-02-2009, 03:00 PM
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Registered
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Quote:
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Gary R. |
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04-02-2009, 03:00 PM
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Registered
Join Date: Dec 2008
Location: San Antonio, Texas
Posts: 3,590
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from my experience the engine will produce great power after a top end refresh since the rest of the engine is already nicely broken in.
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1973 911S (since new) RS MFI specs 1991 C2 Turbo |
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04-02-2009, 05:41 PM
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Blackbird
2005 Porsche 997S 3.8L
