Raptor Forum banner

1 - 7 of 7 Posts

·
Registered
Joined
·
236 Posts
Hey man the head has to come off because you have to remove the valves to put the seals in. I would also recomend lapping the valves while they are out. Mine did this last fall started smoking bad during start up and reving it up. I went ahead and pulled the valve cover off the head (everything) did the valve seals and lapped the valves. I also had it bored .040 over, put in a 101mm piston, new rings. Runs great now. I also put wisco gaskets in. FYI if you do a tear down replace the timing chain as well.
 

·
Registered
Joined
·
236 Posts
You now that I think about it, it can be done with the valves in. I did it on a 5.0 302 mustang before. I think the only reason I said you had to remove the heads was, to do the valve lapping. Tell you what just to make sure I will ask my neighbor, he went to wyotech. He will know.
 

·
I am unique
Joined
·
22,621 Posts
It can be done with special tools and be very cautious, but the job would be extremely difficult for just one cylinder, I kind of doubt if it would even pay not to remove the head............
 

·
Super Moderator
Joined
·
17,058 Posts
You have to remove the springs, which means you need one of the spring compressors that doesn't look like a big C clamp. I only have the c-clamp type, so I pull the head. I can buy lots of head gaskets for the cost of the tools to do it any other way.
 

·
Registered
Joined
·
4,836 Posts
You can also put a small rope down in to the cylinder. Then roll the motor over by hand until it is tight. the compressed rope will hold the valves in place. Just make sure not to rock the motor.

I would think it would be kind of hard getting a valve spring compressor in there though.
 

·
Registered
Joined
·
369 Posts
Hey man the head has to come off because you have to remove the valves to put the seals in. I would also recomend lapping the valves while they are out. Mine did this last fall started smoking bad during start up and reving it up. I went ahead and pulled the valve cover off the head (everything) did the valve seals and lapped the valves. I also had it bored .040 over, put in a 101mm piston, new rings. Runs great now. I also put wisco gaskets in. FYI if you do a tear down replace the timing chain as well.
i agree with the timing chain thats like cheap insurance lol for now on everytime i tear mine down ill change the chain i mine got wore and loose and it jumped timing bent the valves and knocked dents in the piston
 
1 - 7 of 7 Posts
Top