Grand Cherokee Oil Pan Bolt Size Guide

If you're looking to replace the oil pan bolts on your 99 Grand Cherokee 4.7, you'll need to know the correct bolt size. The bolt size for the 4.7 engine is M6, with a 6mm threaded part and a 10mm head. To remove and replace the oil pan, you'll need to follow a few steps, including removing the bolts holding the structural dust cover and dropping the front differential. It's also important to note that you should not pry between the engine block and the tray when breaking the seal between the oil pan and the windage tray.

The bolt head is 10mm and the threaded part is 6mm

The bolt you are looking for is a standard M6 bolt. The bolt head is 10mm and the threaded part is 6mm. This is a common bolt size, so you should be able to find them at most hardware stores.

The length of the bolt you need will depend on the specific application. M6 bolts are available in a variety of lengths, typically ranging from 12mm to 150mm. The length of the bolt is measured from the bottom of the head to the end of the threaded portion.

When selecting a bolt, it is important to consider the type of material and the intended application. For example, A2-70 stainless steel bolts offer corrosion resistance, making them suitable for outdoor use. However, they are not suitable for replacing high-tensile fasteners.

It is also important to use the correct tools when working with bolts to avoid damage and ensure proper installation. In this case, a 10mm spanner or wrench is required to tighten or loosen the bolt.

In terms of your specific application, a forum user with a '99 Grand Cherokee 4.7 confirmed that the oil pan bolts have a 10mm head and a 6mm threaded part. They also mentioned that a 10mm socket can be used to remove the bolts, but be careful not to scratch the surrounding area.

It is always recommended to consult a professional or a mechanic if you are unsure about the bolt size or the repair process.

The bolt size is M6-1.0x15m/m

The bolt size M6-1.0x15m/m is a metric bolt size. Metric bolt sizes are defined by the ISO standardisation authority. The 'M' in the bolt size indicates that the bolt uses a metric thread.

The bolt size can be broken down as follows:

• The 'M' indicates that the bolt uses a metric thread.
• The number '6' refers to the nominal diameter of the bolt shaft in millimetres.
• The number '1.0' is the thread pitch of the bolt, or the distance between threads, in millimetres.
• The final figure, '15', is the length of the bolt in millimetres.

It is important to use the correct bolt size to ensure the safe assembly of machinery, equipment, and vehicles. In this case, the bolt size M6-1.0x15m/m is relevant to the oil pan of a 1999 Jeep Grand Cherokee with a 4.7 engine.

When working with bolts, it is also important to use the correct tools, such as spanners and allen keys, to avoid slipping and causing damage to the bolt or nut. Additionally, when tapping a hole, it is important to keep removing the tap and blowing away the swarf to prevent the tap from jamming and breaking.

The bolt size for larger screws is M8-1.25x20m/m

The bolt size for larger screws on a '99 Grand Cherokee 4.7 is M8-1.25x20m/m. This bolt specification can be broken down as follows:

• The letter 'M' indicates that the bolt uses a metric thread.
• The number '8' refers to the nominal diameter of the bolt shaft in millimetres.
• The number '1.25' is the thread pitch of the bolt, which is the distance between threads, in millimetres.
• The final figure, '20', is the length in millimetres.

It is common to see metric bolts specified in an abbreviated format that omits the pitch definition, in which case the bolt is assumed to have a coarse thread. For example, "M12-50" has a diameter of 12mm, a coarse thread, and a length of 50mm.

Metric fasteners are available with either coarse or fine thread pitches, with coarse thread being the most common. Coarse metric fasteners, when compared to standard "inch" fasteners, tend to have more closely spaced threads.

When specifying the size of metric screws or bolts, it is usual to provide the diameter, pitch, and length in millimetres. For nuts, only the diameter and pitch are given.

The small screws are 1/4-20x1/2

If you're looking to replace the oil pan bolts on your 1999 Grand Cherokee 4.7, you'll need to know the correct bolt size. Specifically, you're asking about the small screws, and the correct size for these is 1/4-20x1/2.

This measurement is a standard specification for screws and indicates the size and thread type of the fastener. In this case, "1/4" refers to the diameter of the screw, which is 1/4 of an inch. "20" indicates that there are 20 threads per inch on the screw, and "1/2" refers to the length of the screw, which is 1/2 of an inch.

These small screws are typically used in conjunction with a 7/16" wrench and should be torqued to 7 pound-feet. It's important to use the correct size wrench to apply the appropriate amount of torque and avoid damaging the screws or the oil pan.

When replacing the oil pan bolts, it's recommended to use LocTite #242 or an equivalent product on the screw threads to ensure they remain securely in place. Additionally, make sure to verify the measurements before purchasing new bolts, as there may be variations between different models of the Grand Cherokee.

The large screws are 5/16-18x3/4

If you're looking to replace the oil pan bolts on your 1999 Grand Cherokee 4.7, it's important to know that there are typically two different sizes of bolts used. These are classified as the small screws and the large screws.

The large screws, which are the focus of this discussion, are sized 5/16-18x3/4. This measurement indicates the dimensions of the bolt, with the numerical values representing the diameter and length of the bolt, respectively.

These large screws require a 1/2" wrench for proper installation and should be torqued to 11 pound-feet for secure fastening. It's worth noting that these bolts are typically larger and located at the corners of the oil pan.

When purchasing replacement bolts, you may find them described as "Hex Head Bolts" or "Hex Head Cap Screws." They are often made from alloy steel or stainless steel and are commonly available in packs of 50.

Before purchasing, it is advisable to check the specific requirements for your vehicle, as there may be slight variations in bolt sizes and torque specifications.

Frequently asked questions