DennisB DenLorsTools.com © Summary: Recently had a blog reader that’s interested in purchasing a used Dodge Ram Pick-up truck with a 3.7 Liter engine. He wanted my opinion on 3.7’s. Although there’s many, things to inspect and consider before purchasing any vehicle, I responded with the following things that came to mind and that I would consider before purchasing a vehicle with a 3.7 or 4.7 Mopar engine.

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 Access for the fan control module can be gained from behind the headlight.

© DenLorsTools.com Summary: This auto repair blog covers overheating problems with Jeep Grand Cherokees ranging from 1999 to 2004. The cooling fan module location is shown. The cooling fan module is a common problem that can cause the radiator cooling fan not to work. Time saving suggestion to allow much easier access to the cooling fan control module for replacement. Questions and answers for this and other overheating issues covered in comment section.

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Wiring can cause door lock problems, but switches and actuators are more common.

DennisB DenLorsTools.com © Summary: A quick common sense way of thinking about and pinpointing the most common door lock problems on many vehicles. There are several things that can cause the power door locks not to work properly. The most common cause of a single door lock not to work, is a bad door lock actuator (also called a door lock solenoid or door lock motor). Another common problem or cause of door locks not working is simply a bad door lock switch. Many cars today have computers that are also in the loop when it comes to controlling the door locks.

Fortunately, body computer systems are pretty dependable and give problems very seldom. It seems as though the most troublesome vehicles regarding door locks related to computer control issues, are Chrysler’s; Dodge Caravan and Chrysler Town & Country vans sometimes have BUS related issues (BUS means “a collection of wires through which data is transmitted from one computer to another”)… but this is still rare. Ford Explorers also have a few BUS issues that can be related to door lock security module, or wiring shorting out that goes from the door into the body. Usually when checked with a scan tool in the body control or security section, there will be a code indicating if there’s a BUS fault.

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Power window problems? Read on for free tips.

© DenLorsTools.com Summary: Tips on pinpointing power window problems. Broken power windows are usually caused by one of several things. The most common problem is a bad power window motor. The second most common problem is the regulator, followed by a bad power window switch. If the window regulator is broken it could be binding or the cable could be off one of the pulleys. In a few cases, the window may just be STUCK. This happens sometimes in rear windows that get little use. The weather stripping that the window slides in (AKA called a window run) can sometimes prevent the window from moving.

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Get your A/C checked at a local shop or check it yourself? Freon will need to be added by someone.

Summary ©DenLorsTools.com: Adding Freon or topping off a cars A/C system is the most common task performed to restore performance and get cold air blowing again. However, adding refrigerant isn’t always the solution for car air conditioning problems and troubleshooting may be required before just charging a car AC system.

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Jeep Liberty rear door panel.

A Jeep Liberty window is falling down into a door at the alarming rate of one every minute! Kidding aside the Jeep Liberty does seem to have problems with a weak design for the window regulator. Typically the motor can be heard and the window can be raised by hand and temporarily taped in the up position until a replacement part can be purchased. The good news is that it is a really simple job even for a do it yourself-er (DIY), see the tips below.

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Calvan 11/16″ drill bit used with air ratchet and 1/2″ socket.

DenLors tools has sold hundreds of the Calvan spark plug repair kits and has had no reported failures. We’ve answered many questions about Ford spark plug thread repairs over the last couple of years and have included them in various places on our site. Now in this auto repair blog ALL of the frequently asked questions to date are posted here in one central location, if you don’t see your question answered, feel free to use the comment form and ask. Included here are questions about repairing spark plug holes after Lisle, Napa, Auto Zone, or other brands may be thicker than the Heli-Coil, but still have managed to fail and allow the spark plug to blow out AGAIN. We are not out to discredit any other spark plug insert company, we just know from our customer feedback what works and what just works for awhile. The questions below answer questions from real customers with this serious problem. We recommend the Calvan Ford spark plug insert repair kit as the best solution for Ford 1998-2004 4.6, 5.4. 6.8 SOHC (2 valve) engines, the following will help show why.

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