Valve Cover Oil

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Valve Cover Oil
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Repairing a leaking valve cover on a Jeep 4.0 is simple and can be accomplished with simple hand tools. Here are the steps to stop your valve cover oil leaks.

The early Jeep 4.0 valve cover is sealed with RTV silicone. However after 1995, Jeep used a rubber coated metal gasket. Be sure to get the right seal before removing the valve cover to repair a leak. The proper silicone is oil resistant. You can get it from a Jeep Dealer or from some aftermarket suppliers such as Crown Automotive.

Begin by removing the cables going to the throttle body. These unclip from the throttle body and the bracket between the throttle body and the valve cover. Label them and lay them aside.

Remove the crankcase vent tubes.

Next, remove the hose supports and spark plug wire holders that may be attached to the longer studs of the valve cover retaining bolts.

Make a cardboard or Styrofoam template of the valve cover and use this template to keep track of the various types of bolts used to secure the cover. They need to be installed in the same holes they came out of.

Remove all the bolts. They are typically 11mm and you will need a deep well socket for the studs. On the Cherokee, there is one in the back near the firewall that can be difficult to access. I use a 3/8 drive socket mounted on a universal joint to access it.

With all the bolts out, carefully bump the cover with your hand or a rubber hammer to break the seal. Carefully lift it off the head taking care not to drop trash into the valve area.

Scrape off the old gasket material. If you are working the earlier RTV type seal, a Scotchbrite wheel on a drill can be helpful to clean the cover. I mount mine in my drill press to make it easier to handle.

Clean the head mounting surface as well.

For the gasket style, simply place the gasket on the head. Pay attention to the two locating dowels to make sure the gasket is properly aligned. For the RTV style, apply a thick even bead of silicone to the cover and let it sit for about five minutes before installing the cover.

Set the cover in place and make sure it is aligned properly. Make sure that none of the wires or other tabs are trapped between the cover and the head.

Using your template, put the bolts and studs back into the holes they came from. Tighten them snugly but not too tight. These are small bolts.

Replace the holders on the studs and put back any nuts that were removed.
Reconnect the cables to the throttle body.

Reconnect the crankcase vent lines.

Take a moment to check for any other lines that may have been knocked out of place. It is easy to pop out the line to the MAP sensor or the fuel pressure regulator while removing or replacing the valve cover.

The gasket style can be started immediately and checked for leaks. The RTV style needs to set at least half and hour before starting.

Mike Strawbridge is a Performance Improvement Coach who loves helping people achieve what they truly want in life and business.

To learn more about how to save money of Jeep repairs see ==> http://mikestrawbridge.com/blog

Difference between the trap and the control valve

It is well known that the present valve industry is generally prosperous. And it is obvious that there are many kinds of the valve acting as an important role in the pipeline transportation. Actually, they hold their own specifications for a wide range of applicable fields. Now, comparison between the trap and the control valve is made in the following.

The trap, also called as the steam trap, is the valve which is usually used for network and devices. It can automatically discharge condensed water, air and other non-condensing gas and is able to prevent the leakage of the steam. In terms of the different operating modes, the steam trap is classified into three main types. Generally speaking, the working procedure of the steam trap can be inducted to introduce as follows. Firstly, the valve is correctly placed. Within the state of total opening, the condensed water would entre the valve to fill the valve body. Then, the steam is used to fill the valve body as well. As a result, the buoyancy would be gained to force the valve stem towards the valve seat until the valve is totally shut off. Then, the gas discharged would be cooled down back into the valve body. And the generally increasing condensed water is pressured to pull the valve stem to open the valve after the struggle of the pressure distance. Then, with the reducing of the pressure difference, the valve body would be down to discharge the waste water and the steam. As a result, the new cycle has begun to affect.

Referring to the control valve, it is different from the various traps. It is the valve which includes the self-lubricating valve body by the aid of the water. Or it can be said that the engine oil is not used for its operation. Thus, if some parts fail to work, it is wise to do maintenance according to the instruction. The appreciated sequence is as described. It is to shut off the stop valve end of the main valve firstly. Then, the pressure in the valve should be discharged by loosening the connecting the bolt. Next, it is time to remove the bolt, nut, valve cover, shaft, diaphragm and piston carefully one by one. Then, careful exam is needed to find the damaged part, together with the proper cleaning. Afterwards, it is to put all the part back into the place in the counter sequence. All in all, the attention should be driven all the time in order to enable the reuse.

In word, just as the introduction above, the important point should be inferred that the trap aims at exporting and the control valve aims at imputing. Whatever, they are keeping bring in benefits to the development of the society.

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Will oil work it's way up into my valve cover?

1981 Suzuki GS850G with DOHC. I replaced the valve cover gasket and torqued all the bolts and I then realized I forgot to put some oil on the cam lobes. Will oil from the crankcase work it's way up into the valve cover to lube the cams?

Yes, the first few times it turns over.

1987 Honda Prelude Si from North America - Comments
The water pump broke at around 95,000 miles, just 3 day's after I bought it. I started to notice an oil leak around the valve cover area, pouring down towards the manifold and the left side of the valve cover (facing car).

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