4.0L SOHC motor yrs

[brianexplorerzin]

Hey i found on another thread that the SOHC motor from '97-'03 are the same,,, soooo that means a HEAD from a '02 will fit my '98 engine ?????? if so i found a '02 head for $250 than all i would have to do is buy 2 pistons ,,,

 

[MadExplorer93]

Hey i found on another thread that the SOHC motor from '97-'03 are the same,,, soooo that means a HEAD from a '02 will fit my '98 engine ?????? if so i found a '02 head for $250 than all i would have to do is buy 2 pistons ,,,

If that is true then that is awesome, but how is the BORE in the block?

Is it scratched?

 

[brianexplorerzin]

ohh i dont know,,, i never really checked it out good ,, but i'll have to when i take the pistons out ,,, may have to hone the cyl's out ??

 

[MadExplorer93]

ohh i dont know,,, i never really checked it out good ,, but i'll have to when i take the pistons out ,,, may have to hone the cyl's out ??

Hone or Bore and if Bore/Hone needs to be done that = 6 new pistons and rings to the over amount, say its 10, 20 or even 30 thousands of an inch.

You would then need 10 over or 20 over or 30 over pistons and rings, depends on how much boring needs to be done and/or if it needs to be done.

So i would tear it down to see, before doing anything else.

If it needs 30 over bore.... scrap the block and try and find another good block or motor... 30 over is pushing the cylinder bore pretty thin and if a blow up occurs the motor is pretty much done at that bore. 10 thousands is OK and 20 over is the most i would go.