View Full Version : Time for top end rebuild any advice 04 xb12r

07-13-2016, 01:39 AM
Just found my head gaskets blown, fixing to tear top end down, is there any advantage to use wiseco pistons, or better to stay stock if no damage? Would like any opinions/advice to make this a one time job, or add a little power.

07-13-2016, 01:04 PM
Go with some james or cometic gaskets for replacements. The steel gaskets especially between the case and the bottom of the cylinder will hold up much better than factory.

Depending on mileage lapping/recutting the valves while the heads are off is sometimes a good idea.

If the pistons are good Id probably just do rings and a hone on the cylinders. Make sure to check all of the connecting rod end play and crank runout while the engine is apart.

I went through a rebuild on my 04xb12s because of a base gasket and a bad transmission output bearing just over 20k miles. Those are the things I went through and its been good since(currently at 46,000 miles). One crank bearing ended up needing replaced too.

07-14-2016, 11:12 AM
Thanks for the advice, sorry for the double post.