The Cyclone succeeds Ford's previous V6 engine families, including the Canadian built Ford Essex engine introduced in 1981, the Ford Vulcan engine introduced in 1985, the original Duratec V6 introduced in 1993, and the Ford Cologne V6 engine, whose design dates back to 1962. The Cyclone engine, also branded Duratec, is Ford Motor Company's latest DOHC family of gasoline V6 engines introduced in 2006. If fuel economy is the main concern, I4s are the way to go.DOHC 4 valves per cylinder with VCT and Ti-VCT (later models) Big displacement engines kill the fuel economy of small trucks across the board. None of the changes Ford has made since then have improved fuel economy (larger mirrors, broader/taller grilles, larger tires), and the truck has gained weight due to safety features and other additions.īut anyone who thinks they will get awesome fuel economy with a 4.0 Frontier or 4.0 Tacoma is kidding themselves too. It was almost certainly the most aerodynamic pickup you could get in 1993, but definitely not anymore. However, the Ranger's design is ancient and that does play a major role in fuel economy. Keep in mind, many Duratec Ranger owners report getting 30+ MPG on the highway, and even my all iron pushrod 3.0 gets almost the same fuel economy in city driving as a 4.0 will on the highway.
There are far more efficient engines out there. The SOHC variant has been around since 1997, and Cologne V6s have been around since the late 1960s. 4.0 is a fairly large displacement for a V6, and the design certainly isn't new. The problem is the vehicle it is installed in. The engine is not the problem here, so don't say that it is. I know several owners who have gone over 250K with this motor. Far smoother than a GM 4.3 Vortec or Chrysler's SOHC 3.7L. Some people say this is a rough V6 but I disagree. Mine neither uses or leaks any oil or water (could not say the same about the 4.3 Vortecs in three S10 Blazers I once owned). The 4.0 motor has been around since the 60's in various displacements and was an OHV motor until Ford chaned to SOHC design around 1997. My fault and changing the valve (not overly easy on the Spt Trac) and running a double treatment of Auto RX rectified the issue. I had this happen on mine and it turned on the PCV valve was bad. I would check the inside the oil filler cap to see there is any sludge build up. On my last oil analysis report it was recommended that I change the filter which I did. I use Amsoil Ea oil filters but would recommend changing every 12K vs 1 year or 25k as recommended by Amsoil. I run Amsoil SSO 0W-30 and I keep it in for 1 yr which equates to about 23K miles. I have timing chain rattle only ocassionally.about once every 6 months. If this is a leased vehicle you may be able to obtain the service records. Not sure if 01 was the last year for the timing chain issue or not. Outside of having the timing chain replaced under warranty the engine has been flawless. I have a 4.0 SOHC in a 2001 Sport Trac that has 4wd and a 5 spd automatic with 154K on it.
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