Nervous Times Ahead

[erbs 42 1 Cars]

Just rebuilt this 1.6 engine back up and now ready to go back in, a bit dubious about turning the key when it comes to rebuilds as I have checked and double checked the engine and hopefully I have not missed anything

 

I,m wondering if it will just start up or will encounter problems on the way

 

It's a fair few quid down the drain if I have fooked up anything but maybe just me being a nervous twat about things like this

 

Should have this started in the next few weeks so will certainly let you know if anything has come a cropper and you know if something has gone tits up is when I,m down the pub smashing em back,( and lack of replies here lol)

Edited May 20, 2014 by erbs

[Anthony 1,003]

First start on a rebuilt engine is always a ltitle nerve-racking, but if you've done the rebuild properly and double-checked everything then it should be fine.

[kyepan 291]

it's worth turning it over with the injectors unplugged until you see a bit of oil pressure, just to make sure.

 

Read up on the hard running in of engines, makes a really interesting read!

Edited May 20, 2014 by kyepan

[calvinhorse 870]

Plugs out and turn the engine over by hand and check the valves aren't trying to smash into the pistons then spin the engine over on the key till the oil pressure is up

 

Make sure all your coolant hoses are on tight!

 

Great feeling when it bursts into life!

[Harni 6]

I assume you have turned it over by hand to check nothing is badly wrong (main bearings in the wrong way or massively badly timed)?

 

Might be worth a small drop of oil in the bores and turn it over with the injectors unplugged to get the oil pressure up before it runs. That is the most critical time in this engines life so give it the best chance.

There is many many methods of running an engine in. Some say run it hard, some say the opposite. Personally i went with the opposite and didn't take it over 3k and about 50% throttle for 4-500 miles. First start i barely even touched the throttle. Just let it run on idle till it hit temp then switched it off. This should give the rings the best chance to seat properly but again, there is many methods to this and everyone has their own opinions on this. Also, do a oil change very soon after the first run (i did it as soon as the oil had cooled after the first run!)

[dcc 855]

Just f***ing put it in, have faith in your ability and fire the bitch up.

 

If its gonna hit valves and pistons it'll need to come out anyway!

[welshpug 1,657]

what do you think I felt like when I rebuilt Dan's engine it still needed mapping poor engine!!

[Edp 67 3 Cars]

You'll soon find out if you've fudged something.

 

I found after re-building an Mi it started to burn off residue and excess oil. It freaked me out initially.

 

As Anthony said, if the re-build went well and you've checked and double checked you should be fine.

[Tom Fenton 1,541]

Have you changed rings or liners? Most important thing as said is to get oil pressure up before anything else. A squirt of oil down each bore is also a good idea before you start to crank an otherwise dry engine. You should ideally crank it over with the cam cover off to verify oil feed to the cam and head.

Once all that is done plugs in and fire it up. Once it runs personally I don't let them idle for the first 15 min or so. On old cams and followers not as important but if you've fitted a new cam and or followers you MUST keep it over 2000rpm for the first 15 min to knock the cam and followers in. After that is done ideally get it up the road, the main thing is to keep varying the revs so lanes are ideal, constantly up and down the box, don't thrash it and don't labour it.

[allanallen 528 2 Cars]

Has it had new rings and liners then?

[erbs 42 1 Cars]

Liners are fine still standard and no lip at the top,and it's had new mains, big ends, and rings

[kyepan 291]

run it in hard... will give the best seal and power

[allanallen 528 2 Cars]

Did you hone the liners?

Edited May 21, 2014 by allanallen

[rallyeash 155]

Run it hard.

There shouldn't be any running in to a degree. All the bearings are to tolerance and don't require running in. It's only the rings which require a decent seal and seems 45 mins of engine running will do that.

[Rock Lobster 28]

Do you need to run on any specific oil after a full rebuild?

[erbs 42 1 Cars]

Did you hone the liners?

Yes of course I did, how will the rings bed in on glazed liners

[kyepan 291]

http://www.mototuneusa.com/break_in_secrets.htm

[Harni 6]

http://www.mototuneusa.com/break_in_secrets.htm

 

See i don't agree with that. Why is it that all manufacturers bed their engines in gently yet this one guy knows better than all the manufacturers out there who have chucked millions over the years into R&D?

If you want a engine thats as powerful as it can be but doesn't last long, rag the s*it out of it from the off. If you want something that is going to last and be a nice drive, use the mostly used, proven and tested method.

All IMO of course

[welshpug 1,657]

I don't know many mainstream mass market manufacturers that run their engines in, other than maybe Honda who are said to send their Type R's out for some VTEC YO!!!! action ....

Edited May 21, 2014 by welshpug

[Harni 6]

I don't know many mainstream mass market manufacturers that run their engines in, other than maybe Honda who are said to send their Type R's out for some VTEC YO!!!! action ....

 

My kia ran a bed in map when it was brand new. Got to about 2000 miles and it was like a different car all of a sudden.

Most recommend in the manual to take it easy for the first xxx miles. Not that many do mind!

[rallyeash 155]

A new car is different to sticking a refurbed engine on though.

[dcc 855]

Give it death as soon as it's warm.

[erbs 42 1 Cars]

i think the best way IMO is to go easy few hundred miles and then build the speed a little more each time, The engine will be more reliable in the end, never seen a car

 

thats been thrashed to an inch of its life and sound healthy at the same time

[Harni 6]

i think the best way IMO is to go easy few hundred miles and then build the speed a little more each time, The engine will be more reliable in the end, never seen a car

 

thats been thrashed to an inch of its life and sound healthy at the same time

 

This

I know a brand new car is different but a completely refurbished engine should be treated as new when running in.

[Edp 67 3 Cars]

run it in hard... will give the best seal and power

 

Absolutely this. I ran my Mi hard and it is a belter of an engine.