Can I retime just the driver's side camshaft? 4.0L-SOHC

D999

MEMBER
1999 FORD EXPLORER
150,000 MILES

I believe the hydraulic chain tensioner went bad allowing the chain to jump.
Mechanic changed the tensioner, but said the engine made a lot of noise when he started it then sounded normal but still runs bad. He is an instructer at a college and a Honda mechanic.I have replaced the plugs, wires, MAF, TPS, fuel filter, oxygen sensors, checked cats, fuel and fuel pressure, upper intake gasket was replaced with chain tensioner. Code reader shows random engine misfire only. Truck starts but runs badly. Rough idle, no power, very bad gas mileage. Repair manuals show many engine specific tools to replace and remove timing chains and recommends engine removal to access passenger side. That is not an option at this time. Can I align TDC#1, back the tensioner out, retime driver's camshaft, tighten tensioner?Where is the timing mark on the camshaft?Where does one buy the special Ford tools if they are required?

1 Reply

KHLOW2008

MECHANIC
41,815 POSTS

This engine does not have any timing marks. Special tools are required for holding the camshaft in position for the timing to be correct.

Symptoms indicates possibly the timgn is out and alsot the timing chain could be too long causing the rattling noise upon starting.

I am not sure where to get the tools but the dealer should be the place to enquire.