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Run the engine on Millers running in oil, can be had from Opie Oils.



Here's what I would do to ensure you have good ring seal and reliable engine :



Start engine for first time, set ignition timing, check for leaks etc and allow fan to cut in once. Ensure the idle stays around 1500rpm to increase oil flow around the entire engine.



Drive the engine HARD for 20 miles, you don't have to thrash the engine to the redline, using 2nd, 3rd and 4th load up the engine upto around 5000rpm ensuring you work the engine. When coming back off load, use engine braking and only slightly on the brakes.



After 20 miles change the oil and filter for more Miller running in oil.



Again don't be a pussy with the engine for the next 150-200 miles, labouring the engine using the gears and engine braking.


Change oil and filter again for some more Millers running in oil.



Do upto 600 miles on this oil and filter.


Change again for more Millers and filter.



Do upto 1000 miles, change oil again for more millers.



Then the last oil change at 1500 mile mark for your specified oil.



The most important thing to remember when running an engine in, is to not allow the engine to sit at a constant speed, the engine rpm needs to be varied as much as possible. My way may be a bit excessive, and after 1500 miles I would remove the sump and remove all metal filings/shavings etc, in fact I would put a large magnet in the bottom of the sump to collect any swarf and this should be cleaned at the 1500 mile mark.


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Wow thanks a lot dude couldn't have asked for any more than that! Awesome write-up!

I usually run the GT on Millers 10w50 so I'm happy enough sticking with the Millers mineral. One thing I never thought about was removing the sump at 1500 to clean the shavings - thanks for that :D

Magnetic sump plugs are a must then! Thanks ukso

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Use this oil mate


http://www.opieoils.co.uk/p-60229-millers-oils-cro-10w-40-competition-running-in-oil.aspx



Then at 1500 miles swap over to a synthetic of your choice :)



Use a magnetic sump plug, but I find that they are way too small to collect everything, so putting a magnet in the bottom of the sump, something from a hard drive or off an old speaker/sub does the trick :thumbsup:


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Will do mate thanks! What other synthetics would you recommend rather than the Millers range, what about Fuschs?

Great idea! Plenty of blown speakers about!lol.. Engines all bolted up ready to go in tomorrow :) Need a new pulley though there was definately a little play in the bottom large one surely that's not right ?

Edited by Ryan_EP82 GT
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It depends on what the clearences and tolerences are like on the engine tbh, because the engine was designed back in the 80's to use on semi synth oils it has larger clearences. It is possible to run the engine tighter on clearences as specified in the manual though and you can use fully synth oils as they are generally slightly thinner.



But looking for good quality fully synth based oils then something like Millers, Fuchs, Motul, Mobil are good choices. Heading in to the colder weather, if used daily I would use a 5w40.



The woodruff key was put back in wasn't it? You can get larger sized keys which will take up the slack a little more if your that stuck.


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Great info again there Adam thanks!

Well I'm 99.9% certain the woodruff key was put back in mate (can't be 100% if I didn't do it myself), but they are reputable engine builders and built my friends GT and my uncles vr6 a few months ago & theyre running fine! but I think ill give them a phone in the morning for my own peace of mind.

But to be honest i think ill be replacing the pulley at this stage for a new one anyway since I've came this far.

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If it wasn't built by yourself then I would expect whoever done it to use the correct size key to suit the application.


I would always recommend using the stock pulley as its a harmonic damper pulley, would be fine to use a lightweight one if the bottom end has been balanced with it though, although I'm still not a fan.


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  • 2 weeks later...

on first fire up raise the revs to 2500-3000rpm and run for 20mins. Check for leaks and issues the entire time.



Don't let it settle below this or it'll start to glaze the rings.



god tip about the metal filings produced by running in an engine, but this is why i supply and fit a high strength magnetic sump plug on all my engine builds i do. Something i highly recommend to all engines rebuilt or not



Tim


TB Developments


Edited by TBDevelopments
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on first fire up raise the revs to 2500-3000rpm and run for 20mins. Check for leaks and issues the entire time.

Don't let it settle below this or it'll start to glaze the rings.

god tip about the metal filings produced by running in an engine, but this is why i supply and fit a high strength magnetic sump plug on all my engine builds i do. Something i highly recommend to all engines rebuilt or not

Tim

TB Developments

Magnet from a zf auto box?

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no we have them made for us, just a straight sump bolt replacement with the magnet in the middle, but had alot of issues with the typical alloy ones on the market with people overtightening them and stripping the threads out so I've had these made in steel, zinc coated with a high strength magnet fitted in the middle.



Tim


TB Developments


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  • 6 months later...

Hi guys, I ordered a load of Millers mineral bedding in oil (ive still 2 unopened 5l drums if any of use need them) and I used Adams service times as a guide. I drove the engine hard rather than easy to bed everything in proper otherwise you can suffer from blowby, although to be fair I havent compression tested it yet.

The engine seems very healthy and car goes like a rocket ship. For a bit of scope im running 9psi of boost with only a fmic and exhaust system and im bumper to bumper with a 250hp dc5 and a 277hp impreza so I cant see any problems as of yet

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Hi guys, I ordered a load of Millers mineral bedding in oil (ive still 2 unopened 5l drums if any of use need them) and I used Adams service times as a guide. I drove the engine hard rather than easy to bed everything in proper otherwise you can suffer from blowby, although to be fair I havent compression tested it yet.

The engine seems very healthy and car goes like a rocket ship. For a bit of scope im running 9psi of boost with only a fmic and exhaust system and im bumper to bumper with a 250hp dc5 and a 277hp impreza so I cant see any problems as of yet

Do a leak down test mate, much more accurate than a compression test and will give you a percentage on how much gas is escaping from the cylinder :)

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