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#99 ford explorer fuel pump replacement sohc how to#

But it does create an expensive repair for the vehicle owner.įord issued a TSB for the timing rattle problem and released a redesigned “‘cassette”‘ (the timing chain, gears, guide and tensioner assembly) for the left front timing chain. This may also cause one of the timing chains to break (typically the front left chain).įortunately, the 4.0L SOHC is not an interference engine so a timing chain failure won’t bend the valves. In some instances, the guide may break and disintegrate and spew debris into the oil pan. The same noise problem can also develop in 2003 and newer high-mileage engines as a result of chain guide wear. The noise is most noticeable when a cold engine is first started, and is usually loudest from 2400 to 3000 rpm. Some of the early engines up through 2002 in the Ranger and Explorer have had a timing chain rattle problem due to the poor design of the original teflon chain guides. But one of the unintended consequences of this fore-and-aft split cam drive arrangement is that it makes the timing chains, guides and tensioners VERY difficult to replace - which makes for an expensive repair when a chain guide or tensioner fails on one of these engines (a common problem on high mileage engines, especially if the owner has neglected regular oil changes). It probably allowed the engine to be shorter and more compact. Why Ford designed the cam drives this way is anyone’s guess. There is also a balance shaft in the crankcase of engines used in 4×4 trucks, which is driven by a fourth chain directly off the crankshaft. Brian Sexton, Automotive Technical Writer, Babcox MediaĪ third timing chain in the back of the engine connects the rear of the jackshaft to the overhead cam in the right cylinder head.Divjot Singh, Applications Engineer, NTN Bearing Corporation of America.Matt Gorski, Manager of Product Development, NTN Bearing Corporation of America.

#99 ford explorer fuel pump replacement sohc how to#

How to deal with corrosion buildup between the bearing, hub, and knuckle.How to sell and manage difficult bearing replacement jobs, reduce installation times and costly comebacks.Should you replace the bearing alone, or opt for a bearing repair kit? How to select the right replacement part for the job.Common customer concerns, and how to correctly diagnose the cause of the symptom the first time.The impact of extreme usage, environments on wheel bearings.

The importance of wheel bearings to the overall vehicle.

This could be due in part to bearing design, construction, corrosion buildup, and/or replacement parts selection.ĭuring this 45-minute webinar we will discuss: Wheel bearing or hub assembly replacement can present a number of challenges to technicians. However, all wheel bearings will eventually need to be replaced. Every remanufactured long block has been specifically engineered to help improve the inherent flaws and failure points that can be found in many of today's engines.Wheel bearings are safety-critical components which feature precision engineering, robust construction, and a long service life. Heads are aligned for proper bore consistency. All valves, valve springs and valve guides must pass our stringent process of meeting and exceeding OEM specifications. Triple angled cutters are used to machine the valve seats ensuring proper pressures and flow. Before each head is mated their block using the correct torque valve we vacuum test all seals for proper seating. These polished Cylinder Heads are pressure tested using magnetic detection to eliminate the chance of cracks or flaws unseen by the human eye. Our Cylinder Heads are assembled using a new valve stem and seals that feature the latest in high temperature technologies increasing heat resistance and longevity. We meticulously mill each Cylinder Head until perfect alignment and sealing of the head gasket is achieved. Crankshaft's are precision cut and micro polished to achieve a 12 RMA reading or better. Computerized micrometers are used to resize rods with strict accordance to factory recommendations. Using a carbon two-stage power hone we can maximize the sealed area and ensure to precisely meet the recommended RMA readings. Once a block is fully cleaned, we begin our precision boring and honing process. Blocks are then thermal cleaned followed by steel micro blasting until they achieve a brilliant appearance. WARRANTY CORE INFO Our precision remanufactured Ford 4.0 blockĮvery Ford 4.0 block must pass our magnaflux inspection designed detect any microscopic flaws or cracking.