Running in a 1341 engine rebuild

[Jezza-7]

My engine has been rebuilt and just waiting on the head to come back from man in shed.

Not too sure on how to go about running it in. The final oil i will be using will be redline 5w40 after 3k. I plan to use millers running in oil to start with.

From another thread i was going to follow these guidelines for starting:

I'd unplug the hallsender so the injectors/ignition don't fire- then turn the engine over on the starter for 30-40 seconds, depending on compression and how healthy your battery is you might be better off removing the plugs.

Once you've got oil pressure I usually remove the feed pipe to either g-lader or turbo and ensure that's free flowing too.

Connect everything back up, crank over for 30sec- then plug the hall sender back in, and fire it.

I'd then keep the rpm at 1500-2000 for 10 min or so, check for leaks, and once warm set the ignition timing.

How should i go about driving/running the engine in on the road?

[ereeiz]

Ooh, this old chestnut, depends on your viewpoint. There's generally two options; take it steady and let everything bed in gradually, or drive quite hard (but in a constructive way). Been a few years since I've rebuilt an engine so I'll let someone a bit more experienced comment.
Something to do with piston rings etc settling better when driven hard is all I can remember now!

[Jezza-7]

Ok thanks for your help though. 

[Peterpolo]

I'd defo disconnect hall sender and do the process like you said to make sure the oil is pumped round the engine before your 1st start.

I have not done much wearing in my self but I think the general idear is wear it in slow and the engine has better life, drive it a little hard for less life and maybe slighty more power, or not!

I would defo take it very easy and don't put it under any or much load for atleast 300 miles, little more at 500, 1000 miles n I would say you can drive it hard!

Thats only my opinion!

[Peterpolo]

P.s, I ran my engine in on the polo I got now after a re-build,

I don't know what the oil grades were but I know I had 2 different types before I got to 10w40,
(mate told me at the time) i was told and did my 1st change at bwt 100 miles and second at 500!

Hope that helps, mine runs sweet!

[Jezza-7]

I think what i will do is use running in oil for 500 miles, then change it to 10w40 semi synthetic then after 3k use 5w40 redline oil.

Will drive nice and easy off boost till the 1st oil change is done then start increasing it till 1k is covered.

[liam]

ive heard that engine braking while running in also helps the rings bed in both ways, up and down.

[Jezza-7]

What do you mean by that?

[Boris]

Using a lower gear to slow the car i.e. when you change down to a lower gear than you would normally use for that speed, the revs raise and 'brake' the car speed.

[Jezza-7]

Ah i see. Thanks

[Langsam]

I would deffently take it easy whilst bedding in your new engine and do regular oil changes like you are going to.

Interesting fact I found out off my mate was he got told by a engine builder when running in his new engine to cruise round at 20mph put it into top gear then put it his foot down then when he felt the engine started to pick up, slow back down again using engine braking and keep on repeating process. This process helps to bed in the rings better.

[Jezza-7]

Thanks for all your input guys. Found this on the net and seems like a goos way to do it.

http://www.pumaracing.co.uk/runin.htm

[Jezza-7]

Right the engine is in and running but there is very strange sound. Sounds like a metal on metal noise. Could this be the pistons? Wossner pistons are coated in something to help them bed in. Has anyone else had a similar sound?

Oil pressure was seen on gauge before starting.

[Langsam]

What was the oil pressure reading?

[Jezza-7]

100 psi at cold.