While doing the H/C swap for my car I noticed that the cylinder walls still had cross hatchings along all of them. Is this normal? Isnt this the sign of 'newer' engine?

I am wondering if my car ever had a swap done to it previously ... it did dyno 308/328 with 117K on the ODO.

Ill Post a pic later on.

 

Could be that whom ever owned it before you was using very good synthetic oil from a very early point in the engines life. I remember reading a story on another forum on how ford ran 2 of their 3.0 Duratec V6's for 100,000 miles one using dino oil from the start and the other synthetic. At the 100 thousand mark they tour the engines down and the one using synthetic still had the hash marks from the hone. Usually you won't see this because a proper break in period taken with normal dino oil will be enough to give the walls a slight mirror finish but in this case because no break in was taken with regular oil the walls were hardly worn at all.

 

this seems normal with every LS1, 5.3, 6.0 that i have ever seen. i know of one 5.3 with 160k on it and it still had the hone marks in it

 

Mine too, at almost 170K. Its just a product of low tension rings.

 

Cool.

Thanks guys

 

I thought this video was an interesting test for Mobil 1.....

http://www.mobiloil.com/USA-English/...Las_Vegas.aspx

 

Sweet, i'll look for that when I do my H/C. Mine's got 136K and I dyno'ed 337hp/352tq with just duals still with an LS1 intake. I'm not even worried about puttin H/C on my car.

 

my 163k ls1 still had them

 

The LT1s were the same way, some showd crosshatch a 200K even from what i remember! I believe a big part of it is teh precision to which teh machining is done these days. The synthetic deffinatly helps though!

 

mine had them at 107k. A motor I got for my friends SS with 12k on it looks brand new almost. now wear sludge or anything. these are truly good motors if taken car of.

 

mine had 140k and still had the ******. ls1s rule

 

mine didnt have any at 92k...

 

Every LT1 and newer GM engine I've torn down (LS1's, LT1's, LS6's, LQ4's) have ALL had the cross hatches, some as high as 180K miles on them. It's a product of high surface finish tolerances in production combined with low tension rings and really good PCM's (good fuel management). Engines don't get old as fast as they used to.

 

just did my heads and cam @ 114,000 and mine has them too

 

same here at a 110K