New head. Do I need new pushrods and rockers?


jklolkik

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Getting new EQ 98tm heads. Should i replace my rockers and push rods at the same time?

Also this is going on my 93 4.0. No idea when it had new pushrods. I know 98tm heads arent advised for use on an older engine but im taking my chances and running the highest octane I can get as well
 


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RonD

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Inspect push rods and rockers for wear, its obvious, if they look OK then reuse them, push rods and rockers don't usually have any problems on the 4.0l OHV engines
 

Dirtman

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So friggin big!
My credo
Give me money.
I always just roll pushrods over a pane of glass. If none are bent, clean and re-use them.
 

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Be prepared to ruin those heads, and the rest of the engine.
 

jklolkik

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Yea ive read that these heads bolt up fine but without changing the pistons would be running 10:1 comp. Ive also read some people not having any problem some having a problem with pinging and such.

I believe they would have the lean burn CC but im getting an aluminum rad and efan. I know not much but going to try to keep the temps down a bit more along with running the highest octane.

Will I have a problem with the ECU with the higher compression? Read that some have had no problem with the ECU
Be prepared to ruin those heads, and the rest of the engine.
Besides what I've said any other reason might ruin the engine?

Also i must add the previous owner removed the EGR system and its straight piped. No cats or muffler
 
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88workcar

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ECU has no clue of compression. I run 11:1 in one of my cars, 4 yrs now no issues and 93 fuel.
 


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