Breaking in period?

[Scylla]

Hi Bob
I’m very much hoping to, but I may be on Christmas tree duty for a family friend. I won’t know til nearer the time. Do you meet every month?
Cheers
Damian

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[Enoch]

Sorry Enoch, English is not my first language, so I'm sure that there must be some kind of misunderstanding or do you sometimes really do long trips at constant speed in 1 gear?

I meant do not sit on the motorway in top gear at constant speed for mile after mile...

Variety is the key... variety of engine load, variety in engine speed and variety of gears..

 

[Flamesey]

I meant do not sit on the motorway in top gear at constant speed for mile after mile...

Variety is the key... variety of engine load, variety in engine speed and variety of gears..

Yep just like we do with our bikes even if I’m only doing 2000 in 6th I’m still speeding on the M4

 

[v8hgt]

Building a few engines in my time from classic to race Ducati engines I would advise, don’t spin it too fast at first. Don’t bog it down too much either. But this bit is crucial, you only have a couple of hundred miles to bed the piston rings into the liners before the honing wears into the oil. This means 2 things.
1.Change the oil between 300-500 miles as it’s full of metal by then.
2. You need gas pressure to bed the rings in. One you have gone beyond 1500 rpm you can open it up until 5000 rpm (thus avoiding too slow and too fast) as long as it’s properly warm. Then leave it in the same gear and lift off the throttle totally and let it engine brake back down to 1500 rpm. Keep doing this as much as you can in the first 200 miles.

The old “running in” sign and not exceeding 2000 rpm because of tight spots is a thing of the past with more modern manufacturing tolerances.

Having said that, if I were running in a rebuilt classic engine (not built to race standards) e.g vw flat four or bmc A series I would adopt the 2000 rpm limit and sign in the rear window approach.
With modern factory builds or race builds go with the former ring bedding technique.

 

[tooley]

Took it easy for 1st 1000 miles. Didn't really rev it hard at all unless a) driving through a tunnel or b) windows were down.

Seriously, didn't thrash it. 50k miles now and all good. It seems sensible to follow the owners manual instructions !

 

[Pero]

I meant do not sit on the motorway in top gear at constant speed for mile after mile...
Variety is the key... variety of engine load, variety in engine speed and variety of gears..

OK, I understand now. With "in 1 gear" you meant "in same gear" and not "in 1st gear".
Stupid me...

 

[mustangguy64]

Hi Bob
I’m very much hoping to, but I may be on Christmas tree duty for a family friend. I won’t know til nearer the time. Do you meet every month?
Cheers
Damian

Hi Damian, Yes, we meet every month on 2nd Saturday between 10:00 and 13:00. Cheers, Peter

 

[dtewfoster1974]

The salesman said I don’t need to run a new GT in, which slightly surprised me. I don’t disbelieve him, but I wondered what you say?

I would do at least a 1000 miles, salesmen know nothing.

 

[Gregs24]

I would do at least a 1000 miles, salesmen know nothing.

Indeed - who do you believe - salesman or Ford (in the manual about running in period) It may be worth showing the salesman the page in the manual and then see what he has to say.

 

[Garvin]

Simple rules of thumb for first 1k miles:

- Don’t run in to hard.
- Don’t run in to gently.
- No more than 2/3 throttle.
- No more then 2/3 max revs.

Believe it or not running in too gently is the worst thing for an engine. Glazing the bores by not having sufficient combustion pressure on the piston rings can result in excessive oil consumption for the remaining life of the engine.

After the first 1k miles progressively increase throttle and revs for next 500 miles. After 1500 miles have as much fun as you like but always, always warm the engine up fully before ‘ragging’ it..

 

[foxspeed]

just drove mine normally didnt thrash it

 

[Flamesey]

Gave mine some beans the other day after 1500 miles in sport plus but when I lifted off the clutch changing gear there was a metallic noise and I felt something... it was like if I’d crashed the gears a bit, metallic sounding .... didn’t sound good bearing in mind people in the states are having 2 and 3 gears breaking and having replacement gearboxes apparently. Heard of people messing up their clutch doing burnouts too. I’ve gone back to taking it easy again and I’m listening out for a repeat performance.

 

[avocet]

Gave mine some beans the other day after 1500 miles in sport plus but when I lifted off the clutch changing gear there was a metallic noise and I felt something... it was like if I’d crashed the gears a bit, metallic sounding .... didn’t sound good bearing in mind people in the states are having 2 and 3 gears breaking and having replacement gearboxes apparently. Heard of people messing up their clutch doing burnouts too. I’ve gone back to taking it easy again and I’m listening out for a repeat performance.

Changing gear over 5000 revs gives you a weird mettallic spring noise/feel sometimes.I read somewhere its the flywheel.I dont really shift hard at high revs as i don't want to break shift forks.Can you imagine the wait for them.

 

[Flamesey]

Ah ha , that could be it as I was probably around that figure fast shifting having kept mostly around 2-3. Yep I can imagine long waits for MY18-19 especially for my local Ford dealership which doesn’t sell them either. I’m still waiting on stripe replacements but that’s my selling dealer waiting on Ford.

 

[foxspeed]

did you give it full clutch travel...you can sometimes do a quick change without full pedal & it can catch the synchros out causing a "crunchy" change

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