Cylinder head replacement

[moore_savage]

I'm going to be replacing the cylinder heads on my 2001 3.0L they come complete. should I get new rockers and rods too, or will the old ones be okay?

 

[RonD]

Welcome to TRS

Yes, if the originals don't show any unusual wear on the push rod ends or rocker sockets you can reuse them

There were Roller Rocker kits for these engines, but mixed bag on if they were "worth the money" without doing other modifications with them.
Rollers reduce the friction, and usually opened valves a bit more to increase air flow
On their own you wouldn't notice any gain in power while driving
Dyno tests do show a gain but not really enough to feel it

2001 3.0l Vulcan engine did use TTY(torque to yeild) head bolts, so they can not be reused, even regular head bolts shouldn't be reused, lol.
But for sure the TTY bolts shouldn't be
And if you look up the torque specs on 3.0l head bolts you might find different specs, that is because BOTH regular and TTY head bolts were used over the 22 years this engine was manufactured, TTY bolt specs always have a DEGREE final torque, not a ft/lb final torque
So if you see "turn 90deg" or similar as final tightening thats the specs to use on 2001 3.0l head bolts
If you see "tighten to 68ft/lb" or similar then thats the wrong specs for 2001

 

[moore_savage]

Thank you soo much and yes i got new head bolts on the way. with the heads. im pulling the old ones off tomorrow to see if they are cracked or not. my father in law re used the head bolts 3 times. he was done working on the truck so i bought it from him. really appreciate the reply back so quickly.

 

[RonD]

Had the heads off 3 times???

There MUST BE a story there.....................lol

Use a straight edge and check the block surface for warping
Easy to do, just use a flashlight behind straight edge and look for light come thru under the straight edge

 

[moore_savage]

okay ill do that. do the blocks warp easy?

 

[RonD]

No they don't, but unless there are some good reasons for the 3 "head jobs" then there may be an underlying reason for the head problem

 

[heavy breather]

Ron is right. There seems to be a problem. A set of heads, baring over heating or some type of valve failure should last the life of the vehicle.

If the truck has ever been over heated then something could have warped out of speck.

Although I guess if he is re using the TTY bolts, it could be that the heads were not properly torqued correctly causing issues.


When torquing your head bolts make sure you use a good torque wrench, some lube for torquing bolts(ARP's lube is cheap from Amazon). Also be sure to use compressed air and blow out all fluids from the bolt holes before inserting head bolts. You can and will crack the block if oil, coolant, or some other liquid is in the bolt hole.

Also check the gasket and make sure the correct side faces down and up. On some gasket sets it matters, on most it does not.


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