Cross hatch hone - blown!!
Thread Starter
TECH Veteran
Joined: Aug 2002
Posts: 4,055
Likes: 1
From: Hartsdale, NY
Cross hatch hone - blown!! When my heads were off recently, I noticed the cross hatch hone marks in the cylinders were completely gone! My neighbor even commented that those are the smoothest bores he had ever seen...
The car had 39K on the clock at the time....
No oil consumptionm blow by or other oil consumption issues... actually the car runs great...
...Am I worring amount nothing or I'm I about to become an oil burning rat?
The car had 39K on the clock at the time....
No oil consumptionm blow by or other oil consumption issues... actually the car runs great...
...Am I worring amount nothing or I'm I about to become an oil burning rat?
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
The running great makes me think your ok, but you should be slightly down on power with the extra surface contact from ring to cylinder wall that you get in this condition. This is a sensitive thing since great seal and ultra smooth ring travel pays off in warding off ring flutter= Power.
I do think its unusual you have that smooth a finish at your mileage, did you have any fuel washing tune issues for any length of time?
I do think its unusual you have that smooth a finish at your mileage, did you have any fuel washing tune issues for any length of time?
You should be good for now but, in the long run it might get worse leading to blowby and oil comsumption. With your mileage you should still have good cross hatch on teh cylinder walls.
Thanks,
Thanks,
TECH Addict
Joined: Dec 2001
Posts: 2,298
Likes: 2
From: new england
Originally Posted by robertbartsch
Is it worth doing a compression check? What is an acceptible pressure?
Originally Posted by LS1derfull
I would do leak down and compression test. Leak should be less than 10%and compression should be around 180psi or more depending on cam and static compression.
my recent test on my fairly new forged ls6 was around 170 compression but I have -2cc valve reliefs. Heads are 59cc and milled .050 as with a TR230.
