Engine run-in oil???

[-Bruce-]

Sbd say:
We would normally run an engine in for 500 miles (1000 miles if you want to be really cautious). We use the running procedure which is detailed on our web site for the camshafts under set ups. We would normally suggest you run you engine up to about 3,500 rpm for the first 50 to 100 miles and then progressively increase the revs by about 500rpm every 100 miles. I would also suggest you use a good running in oil for the first 100 miles, then change to a mineral oil (no synthetic) then after 500 miles, change to a fully synthetic oil.

This sounds good to me?? Im just looking for others veiws and what they have done!!

Jim + Dan + Russ + MC + CP etc what oil did you use and what run-in procedure?

Bruce

[j1400]

You don't have to have constant revs at 2.5k when running a cam in, as long as yo don't fall bellow this and got masses above it, it's to let it all lube up and also at idel is when the highest forces are present on the tip of th elobe, not good for a brand new cam to experince that.

Cheapest nastiest 20w-50 mineral oil you can find, ?4 a gallon stuff bruce.

I'd run in as per 4-stroke perf tuning's guide lines

[-Bruce-]

Yeh you said that to me before james, but its just others have said different things to me. Some saying thin oil some saying thick?? But everyone is saying mineral/no aditives!!

Bruce

[getlost29]

shouldnt you just use the oil the car came with from the factory when it was fisrt made. i dont see manufactures puting 30w oil then telling you to change it.

and ur not running the cam shaft in, ur only runing the rings in, what ur actual doing is getting the rings to scrap the bores of the cylinder so that a seal is made

plus all moveable components should be well lubricated before the engine is put together

and just let the engine rev frealy up to 75% of the revs and dont got to low

try not to rev it to hight when its cold though. the best thing to do is probably avoid 5th gear up and down the mototway.

[Stuart]

camshafts do get run in, look at the link to the puma racing site

[-Bruce-]

Getlost29 as stu says camshafts do get a run-in. Puma racing site says and so do both my manuals from kent/piper.

As for the other things you said, thanks its all coming together, i just dont want to damage the engine at all!! :o

Bruce

[getlost29]

i suppose ur right, ive never realy related to camshafts being run in, when used with hydrolic tappets, although i do know you should with mechanical ones.

but i still stick by what i said about running the rest of the engine in

ive never heard of a manufacture to use 30w oil

and i onow for a fact that ford and vw will rev the tits of an engine on a bench once its been built. if it holds to gether it gose in, and if it dosent its in the skip

[Stuart]

indeed, ford pull at random about 10 engines from the batch they make and bench test em at varying loads/speeds for 30 hours. if one fails then the whole batch gets pulled for rebuild/inspection.

also the end of vehicle build "run in" is facking scary!!!


on the flip side of "you dont see manufacturers using run in oil" the last combine harvester that the farm i worked on bought ran on a special run in oil for 100 hours and then they had to drop that out with the oil filter and then use a normal oil. and that was on a V6 turbocharged diesel thats designed to run forever and a day