- Location
- Austin, Texas
'98 XJ, AX15. Only when cold, diesel-like clatter only at idle that disappears only when the engine warms up. High RPM its not audible but revving it also doesn't clear up the noise when it returns to idle. I've been messing around with oil types and thicknesses to address a slightly low (13psi) hot idle so that's been variable.
So which is it, most likely, and what do I try to eliminate it? Oil wise I'm currently running a non-synthetic 10w30, but with a quart of Lucas Oil in it to help the oil pressure. Likely to try a 5w40 next.
So which is it, most likely, and what do I try to eliminate it? Oil wise I'm currently running a non-synthetic 10w30, but with a quart of Lucas Oil in it to help the oil pressure. Likely to try a 5w40 next.