Xflow running in

[Olgawld]

Hi. I've rebuilt my 1700 xflow and now wondering about running it in. It's had some new parts and some re-used. Block has been bored out slightly bigger, new pistons/rings, bearings, valve springs, but reusing same camshaft and followers, crank was just polished. As the cam is the same I presume I don't need to bed that in as I've done before, holding revs at around 2500 for 20 mins etc? Was thinking of using Millers running in oil and using some country lanes, with a few hills, to vary the load, no long A road cruising. After about 100 miles changing the oil for the same then after another 2-300 miles change to Valvoline 20/50. Does that sound about right, any suggestions or tips on how you've run in yours? Cheers

[Roger King]

Sounds about right though I've never used running in oil. Cam won't need bedding in so long as you have kept the followers in the same order that they were originally installed. If you haven't, you have a small chance of catastrophe whatever you do. I don't know if you have a plateau honed bore finish but if you have it won't take too long to bed in. If you haven't it will take a little longer, but it's not like the "old days" when you really did have to run and engine in gently or you'd destroy the bore finish and the rings.

Don't thrash it, don't labour it and don't hold steady revs for long periods - but you've pretty much said that anyway.

[Olgawld]

Cheers Roger, you saying I'm doing the right thing will do for me.