Post by
DrJuice164 »
https://forums.nicoclub.com/drjuice164-u29229.html
Mon Jun 29, 2009 2:00 pm
To add, if you had overheating issues prior, this could have warped the head thus not sealing perfectly. If it is a bad HG, there will most likely be oil in the coolant and vice versa.
For a quick test, you can do a compression test, if you find a low cylinder, poor a cap full off oil in, it the pressure increase a lot, you have bad rings; otherwise good chance it's valve stem seals.