Hi:
I've read that the 4.0 OHV cylinder heads are prone to cracking. I can confirm that having two Explorers--91 and 98--that I've had to replace the heads. I've also read that most cracks are hairline cracks not visible to the naked eye.
If that is the case, how does a mechanic know a head is cracked and it's not some other issue; a bad head gasket for example?
Just curious.
Thanks
I've read that the 4.0 OHV cylinder heads are prone to cracking. I can confirm that having two Explorers--91 and 98--that I've had to replace the heads. I've also read that most cracks are hairline cracks not visible to the naked eye.
If that is the case, how does a mechanic know a head is cracked and it's not some other issue; a bad head gasket for example?
Just curious.
Thanks