Having problems with your 2004 Ford Explorer ?

Hi i have a Ford Explorer 2003 v8 4.6 L.

\015 Have a mechanical knock in cylinder head area. Had cylinder heads reconditioned. Knock still there. Replaced cylinder heads with 5000klm\015\012old heads & knock still there. Any ideas?\015\012Thanks\015\012Evan\015 Posted / edited by AnonymousUser on : 23-11-2020

Answers :

Hi and welcome to FixYa,

A few exploratory queries:
  • have you tried changing fuel to a higher octane?
  • \015\012
  • is the "knock" consistent or intermittent?
  • \015\012
  • when the head(s) were reconditioned/replaced, were the pistons checked?
  • \015\012
  • was a compression test done before and after? If yes what was the reading pls?
  • \015\012
  • have you tried switching/swapping sparkplug wires?
  • \015\012
  • any other symptoms, indicators, such as higher than normal operating temperature, poor idling when cold?
Pls post back. Good luck and thank you for using FixYa.
Repair Help & Product Troubleshooting for 2004 Ford Explorer

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