Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: archiewood on 24 April 2010, 21:57:59
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My X30XE has had new rings and bigend bearings, and according to Haynes I should treat it as "new" after doing this and follow running-in procedures. I know about cranking it with the fuel pump relay and DIS unit unplugged to get the oil pressure up before firing it, but what oil should I use at each stage of running in, and for how long? Cheers.
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Rings need careful bedding in, IMHO.
Crank without plugs until you have oil pressure and then get it out on the road as soon as it's safe to do so without too much idling.
During the first 20 or 30 miles, give the engine short bursts of full throttle, not to stellar RPM but well into the torque, so 3500-4000 RPM, for a few seconds at a time. In-between these bursts, come off the pedal and let the engine overrun. You might need to hold the autobox in a lower gear to achieve this if not manual.
Short bursts of full throttle force the piston rings against the bore and allow the two newly machined surfaces to form a seal. There will be more friction than usual, hence the recommendation to only stay on the power for short periods (say up to 10 seconds) to avoid overheating.
When you lift off in-between the overrun scenario causes oil to be drawn up to lubricate and cool the rings and bores.
Once this is complete I would say continue this general theme. Give the engine varied load conditions, avoid prolonged labouring and high RPM at first but don't treat it too much with kit gloves. Give it some full throttle running in shortish bursts. Gradually extend the rev limit over the first 500-1000 miles then change the oil and filter and treat as normal thereafter.
Kevin
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That's good, thanks. What oil should I use at first?
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mineral oil - tex 15/40 havoline from morrisons at 8.99 is ideal
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mineral oil - tex 15/40 havoline from morrisons at 8.99 is ideal
Agreed. It's only going to be in there 1000 miles during which time it's not going to be thrashed. Having said that, vx semi synth is not much more expensive on TC.
Kevin
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Morrisons! ;D Cheers. And synthetic is good after that?
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Morrisons! ;D Cheers. And synthetic is good after that?
There is an argument that synthetic oils should be avoided until a car is well and truly run in on the basis that they don't allow enough friction for the bedding in process to complete. I haven't seen enough evidence either way but it might be worth making the first few oil changes semi synth just in case.
Kevin
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Thanks, I'll use semi for now then.
One final question: how long should I expect it to take to get oil pressure? I cranked it for 10-20 seconds and the oil light was still on.
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bump
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bump
Edit: Sorry all, I just remembered the rule. :-[