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Proper break-in procedure for V8?
Posted 10 October 2011 - 10:25 PM
I have read conflicting things, some saying to go easy on it for 500 miles, others saying to go for high revs. At what point can I drive it "normally" (i.e. occasionally "spirited" but not abused)?
The "break-in oil" in another thread also sounds interesting. Is this widely recommended?
My first rebuild - so any thoughts are welcomed. Thanks!
Posted 10 October 2011 - 10:47 PM
to name the things if I see them, that's what I call integrity..
Posted 11 October 2011 - 01:16 AM
A great deal of controversy (if that's the right word) has to do with build "tolerances," and what is an "older motor" versus a "modern" motor. What year would the "cutoff" be? It's a rather subjective call IMO. The theory here is that the more modern motor, built to higher tolerance standards, is less needy of achieving "break in" wear patterns---they're already close to ideal spec upon completion of the factory build.
I've never seen what Lotus recommended for the V8's break in, as I was not the first owner. But I'm sure that someone on the forum will have run across it, and will contribute that information shortly.
Posted 11 October 2011 - 02:09 AM
Posted 11 October 2011 - 12:23 PM
Posted 20 October 2011 - 08:02 PM
google "bedding in the hard way" but as said, lots of people, lots of ideas....
Edited by lotus-62, 20 October 2011 - 08:09 PM.
Posted 23 October 2011 - 08:09 PM
my engine is not ready yet so please try and if it does not work just tell me lol
Posted 24 October 2011 - 01:13 AM
What I have done since for the first 500 miles or so is use dino oil for break-in and change at 500 miles, always make sure the engine is completely up to operating temp, vary the rpms (as in don't run a constant speed for significant periods), push the engine a little but not full throttle. This has worked well on the last three engines I've rebuilt with good compression readings, performance and minimal oil usage.
Posted 24 October 2011 - 02:12 AM
I'll see what the mechanic suggests, but my own instinct is to do what you are recommending - push it a little but not all out.
Is "Dino" oil the same as break-in oil?
Posted 24 October 2011 - 12:02 PM
3,500rpm max for 500 miles then 4000rpm max for the next 1000 miles is what it says.
Posted 24 October 2011 - 01:15 PM
Posted 24 October 2011 - 05:19 PM
thanks for telling!
Posted 24 October 2011 - 07:40 PM
So that's the original factory break-in procedure from 1985 that the first owner would have had to follow?
It will be painful to drive 1500 miles that carefully, but I'll do it if that's what it takes! I wonder if the 1999 V8s would be different for any reason.
Posted 24 October 2011 - 08:41 PM
3000rpm for first 500 miles and then 4500rpm (not 4000 as I said previously) for next 1000 miles.
It also says to avoid excessive throttle and long periods of idling.
Note this is from a 2000 Sport 350 and is a sticker on the windscreen presumably aimed at the first owner. It is somewhat difficult to remove so I guess that's why it is still there!
Posted 24 October 2011 - 10:25 PM
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