is it ok to use copper spray on head gasket? the block is sleeved b18c.

 

What head gasket are you using? Is the block and head both a machine finish? We need a bit more info...

 

It is fine on a Honda motor but there is no replacement for perfectly straight mating surfaceS (yes plural, head and block). I copper spray all my head gaskets both N/A and F/I and have never had a failure.

 

stock and yes both are finished, but i want to make sure everything seals there are some scratches on head, but not on the important parrt of the head.

 

Copper spray won't hurt, but is a pain to clean off for a rebuild. Honda MLS gaskets use something similar to hylomar (the black stuff), and has proven to be amazing at keeping a good seal.

 

If both surfaces are machined smooth, copper it up!!!

 

See I wonder about the Quality of OEM HG's I wwas going to order cometic gasket for my F/I setup but someone on here told me OEM would be fine..... I plan on running about 300-350 whp.....

 

^^you will be fine with oem head gasket.

 

There are plenty of people pushing well over 600 HP on OEM Honda Head Gaskets with out problems. I have used Cometic with out problems as well. Almost any head gasket will work and give good seal if both mating surfaces are parallel.

 

i use copper with felpro headgaskets with no problem. but if i was shooting for some serious power (450+) id go oem with no copper and FRESH CUT decks.

 

Yup. I got both my deck and head machined so that when I am running boost I have no problems with headgaskets for a while at least