Heads

rnoswal · 01-31-2006, 02:38 PM

Heads are the same. The exhaust cam is slightly different from what I hear. Is it noticeable or not, I haven't heard anything from anyone on the cams, but just stick with the N/A cams you have. I think the advice it to torque the head down to 72 lbs with the stock bolts. The heads are a non interference valve setup. If the belt breaks then you won't bend a valve.

Valve stem seals at least but it wouldn't hurt to get a valve job done by someone you trust. If you do get a valve job done though, you have to adjust the valves and that means shim time. If your shop has shims, give them your cams and let them do it. Surface the haed and check the water gallies on the head. They tend to get eaten out and can cause the head gasket to blow again. You don't have to worry about buying an extra thick head gasket or shim when you have the head milled either. A little more compression won't hurt and the cams are easily adjusted to make up for the loss of a little head height.

Make sure you put the cam caps on the right cups. They are numbered and have ex or int stamped on them. If you don't, you will lock up the cam!

Have fun!

Russ

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01-31-2006, 02:38 PM	#3
rnoswal Lexus & 550's Join Date: Apr 2005 Location: Bossier City LA Posts: 556	Heads are the same. The exhaust cam is slightly different from what I hear. Is it noticeable or not, I haven't heard anything from anyone on the cams, but just stick with the N/A cams you have. I think the advice it to torque the head down to 72 lbs with the stock bolts. The heads are a non interference valve setup. If the belt breaks then you won't bend a valve. Valve stem seals at least but it wouldn't hurt to get a valve job done by someone you trust. If you do get a valve job done though, you have to adjust the valves and that means shim time. If your shop has shims, give them your cams and let them do it. Surface the haed and check the water gallies on the head. They tend to get eaten out and can cause the head gasket to blow again. You don't have to worry about buying an extra thick head gasket or shim when you have the head milled either. A little more compression won't hurt and the cams are easily adjusted to make up for the loss of a little head height. Make sure you put the cam caps on the right cups. They are numbered and have ex or int stamped on them. If you don't, you will lock up the cam! Have fun! Russ