Break in oil

[Joe C.]

Re: Break in oil

This is what happens if you don't use break-in oil in a new engine: http://www.youtube.com/watch?v=TuKYBb9wPDs

[Michael H.]

Re: Break in oil

Amazing that people get all excited about oil for break in but most are still honing cylinders with a $14. Sears hand held hone.

[Gene M.]

Re: Break in oil

Amazing that people get all excited about oil for break in but most are still honing cylinders with a $14. Sears hand held hone.

the deluxe left handed model $12.99 @ harbor freight w/coupon.............!

[Joe L.]

Re: Break in oil

Duke,
Thanks for saving me the time to look up the specs. I agree that the distributor is the most neglected. I found shim washers that worked and stocked up years ago.
When my shop was in Huntington Beach (just down the road from you) I sent 2 distributors to a very well known place in Orange Co. to install pointless ignition and set the weights & can up. I told them while they had the distributors there to bush & space them. When I got them back the end play was the same as when I brought the distributors there. I refused them and they spaced them.
WHY did the factory send them out that way? I have shimmed so many that I am almost out of shims.

DOM

DOM

DOM------


Why did the factory send them out that way? Very simple. The FACTORY SPECIFICATION on the blue prints for distributor shaft end clearance for most distributors (except FI) is 0.025" to 0.096". Most NOS distributors will be found with an end clearance of about 0.060" which is, curiously, right in the middle of this range. Based upon the FACTORY SPECIFICATION, the MINIMUM allowable clearance is 0.025". It's my belief that GM engineers had a good reason for this and, personally, I follow it.

[Dick W.]

Re: Break in oil

Modern engines today are just that, modern. Modern engines have roller cams, a total different animal, The old 50's 60's flat tappet cams require ZDDP additive that most oils today do not have. So I will stick with the profession advice and use ZDDP additive or Brad Penn. You can do what ever you want with your new rebuilt engine. Oil cost is nothing compared to an engine tear down for a cam wipe out.

Just as a side note John Deere requires break in oil on almost all equipment sold and for engine rebuilds.

Never owned a Deere that required a break in oil?? Did I miss something?

[Joe R.]

Re: Break in oil

Whoaaa, that was like COOL and stuff!

[Joe C.]

Re: Break in oil

Whoaaa, that was like COOL and stuff!

What was like cool and stuff?

[Joe R.]

Re: Break in oil

The video you posted of how to blow up an engine!