98 7.4L MPI manifold torque sequence

[Shaun78]

What is the special order to torque the nuts that hold the exhaust manifold to the head?

I actually had to use a dremel to grind & sand the crud attached to the head in order to get a smooth surface again. Yes I was careful not to remove much material, just the crap that needed to go.

 

[HT32BSX115]

Re: 98 7.4L MPI manifold torque sequence

Howdy,

This applied to mine. http://www.boatfix.com/merc/Bullet/97/97_01.pdf (a 97 carbed 7.4L )

Check Manual #16 http://www.boatfix.com/merc/Servmanl/srvcovr.pdf


It may apply to yours but you need to check the correct service manual either way.

Regards,

Rick


That's a nice boat. you really should get yourself a set of Mercury manuals for it.

 

[Don S]

Re: 98 7.4L MPI manifold torque sequence

Are you talking intake or exhaust manifolds?

 

[Shaun78]

Re: 98 7.4L MPI manifold torque sequence

sorry, exhaust manifolds

 

[Don S]

Re: 98 7.4L MPI manifold torque sequence

Start in the center and work your way out to the ends.

 

[Coors]

Re: 98 7.4L MPI manifold torque sequence

and use a straight edge.

 

[HT32BSX115]

Re: 98 7.4L MPI manifold torque sequence

Am I losing it? I could have sworn he said INTAKE manifold...

 

[Don S]

Re: 98 7.4L MPI manifold torque sequence

Am I losing it? I could have sworn he said INTAKE manifold...

No, he didn't say intake or exhaust originally, he did go back and edit the post to say exhaust.

 

[Shaun78]

Re: 98 7.4L MPI manifold torque sequence

Thanks. Don have you or anyone ever had to grind the crud off the head to make a smooth surface again? (exhaust manifold) It was more than just the old gasket, there was cast almost welded itself to the head, maybe part of a corroded manifold?