Fluid below the valve’s set-point temperature is bypassed to a reservoir or bypass loop while fluid at or above the set-point is diverted to the system’s cooler. I pulled this from an AMSoil site. While we expected transmission temp to rise as the truck came up to operating temp, we didn’t expect it to go 118 degrees over ambient (for those that don’t know, 100-degrees over ambient is considered the ideal operating temp for most transmissions). The valve 10 is also connected to an oil cooler 18 by a cooler supply line 20 and a cooler return line 22. Opens fully at approx. We ended up with no bypass. Once free from its mounting fasteners, the air box lifts up and rolls out of place. Once this temperature is reached, oil is allowed to flow to the transmission oil cooler. The thermally responsive element is not integral with the valve member, but against it, through a relief bias means. Get the latest diesel news, mods & reviews straight to to your inbox! Once the snap-ring is in, it’s wise to use a small flat head screw driver to ensure the snap-ring is both fully seated and spread out. 2 toward a location remote from the valve seat 44. average) Easy install, drop in replacement…can be done in-car when servicing the valve body. AirflowCADChevyCNCCumminsCummins DieselDieseldiesel engineDiesel ExhaustDiesel TruckDuramaxDuramax DieselFluidGMCRadiatortransmission. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to ... 165/35, 251/80 . The housing 24 further includes an elongated cylindrical valve chamber 42 having a portion adjacent the wall 26, and a larger diameter counterbore portion adjacent the cap 28, the different diameter portions defining an annular shoulder or valve seat 44. In cold weather, it allows transmission fluid temperature to warm quickly. The relief spring 66 is designed to accommodate extension of the pin 62 for oil temperatures up to 300° F., which is far in excess of normal oil operating temperatures. While lowering the factory air box into place, be mindful of where the mass airflow connector is, make sure the coolant bleed-off hose is out of the way, and avoid damaging the charge air temperature sensor. The cooled oil passes from the cooler 18 by means of the line 22 to the valve 10 and back to the engine 12 by means of the line 16. The warm-up position of FIG. Lockhart Industries, Inc. (Paramount, CA), 236/93A, 251/80, 236/34.5, 236/93A, 236/99J, 165/35, 251/80, Click for automatic bibliography Once seated such a valve member is susceptible to at least two malfunctions. The result of the bypass valve not functioning as it should is excessive heat in the transmission—and the problem only gets worse with increased line pressure in the mix, such as is often the case in built transmissions. Installing a transmission cooler can prevent transmission burnout. Its opposite ends engage the spring retainer 60 and the adjacent face of the valve member flange 50. Hot Rod RV Ram: A 1997 Dodge Ram Cummins For The Modern Age. In one embodiment of the invention in which the valve member is seated against a valve seat in its cooling position, further expansion of the thermally responsive element can occur without damage to the bypass valve components since the expansion is accommodated by compression of the relief bias means. With LDP’s drop-in bypass valve in place (top left port), full flow, in and out, is made possible. The company’s transmission cooler bypass valve provides full flow to the auxiliary cooler and drops ATF temps by as much as 60 degrees. Throughout the course of the drive, and even on the 60-mph highway section of the trip, the Allison’s transmission temperature never leveled off. Re: 2014 6L80e Temperature Control Unit. To see its product in action, we stopped by LDP’s Troy, Missouri facility, where it was being installed on a ’19 dually. The spring 52, valve member passage 48 and valve chamber 42 are generally coaxial, the diameter of the coils of the spring 52 being such that there is ample space for spring extension and retraction relative to the walls of the chamber 42, and relative to the cylindrical postion of the valve member 46 encompassed by the spring coils. With the air intake reinstalled and the clamps at both ends of the intake tube cinched down, the mass airflow sensor can be plugged back in and locked. It acts like a thermostat, staying closed until the temp reaches approx 190 degrees, then opening to allow fluid to flow through the cooler. In every case this substantially reduces transmission temperatures. generation, Thermal bypass valve with bimetallic control, Thermostatic and pressure responsive control valve, <- Previous Patent (Device for draft con...). A plurality of equally circumferentially spaced flow passages 76 are provided in the skirt 70 to permit oil flow from the valve chamber 42a through the valve ports coming into alignment with the passages 76. Following some before and after testing, the bypass valve dropped transmission fluid temp by 49 degrees, and it did so on a 38-degree winter’s day. Which is a great idea in theory. & Terms of Use. At this point all labor is complete. This causes severe damage to the transmission over time because it is not being adequately cooled by the transmission cooler. Engine bypass flow from port 34 to port 36 is blocked by the seated flange 50 so that all the oil goes through the cooler. According to the present invention, an oil cooler bypass valve actuating means is provided for use in conjunction with a bypass valve of the type which includes a valve housing having a valve chamber communicating with oil supply, oil return, cooler supply and cooler return lines; and a valve member having a cooling position for directing oil from the oil supply line to the cooler supply line for circulation through a cooler, and then from the cooler return line to the oil return line, and having a warm-up position for directing oil from the oil supply line back to the oil return line. LinCo DIESEL PERFORMANCE-TROY,MO-transmissions-tubos-monitors-tractionbars-repair-diesel trucks. The Next Frontier To Duramax Drivability: Duramaxtuner ECM/TCM Matched Tuning Software. Such a thermally responsive compound in a thermostat 54 of the type described is well known in the prior art. Details of the cooler 18 are omitted for brevity since suitable coolers for cooling oil are well known in the art. In the amount of time it takes to read this article, the entire job can be performed on your ’17-present L5P Duramax. BUY NOW. OE cooler bypass valves allow transmission fluid to bypass the cooler and flow right back into the transmission, quickly raising the transmission temperature. 3 to the cooling position of FIG. 4 and the warm-up position of FIG. 2 but illustrating the valve actuating means in its cooling position; FIG. Mine did the same thing. The finished, installed product looks like this. The present invention relates to oil cooler bypass valve actuating means, and more particularly to actuating means of the type utilizing a thermally responsive element to effect valve actuation. Privacy Policy HOME OF THE PATENT PENDING L5P TRANSMISSION COOLER BYPASS VALVE PLUG! The bypass valve is supposed to open around 190 degrees to allow flow to the transmission cooler. 4R100 Cooler Bypass Delete Kit. So long as the O-rings are lubed, it reduces the chances of rolling or tearing them during installation. As previously indicated in the description of the prior art, the purpose of the bypass valve 10 is to receive engine oil from the engine 12 by means of the line 14 and return the oil through the line 16 during warm-up periods, such as when the oil is at a temperature of 160° F. or less, for example. There also have been numerous melted down transmissions due to the bypass valve … Generally, the compound is one which expands with a temperature rise to urge the pin 62 outwardly, and contracts with a temperature reduction to enable the main spring 52 to move the pin 62 inwardly. Use on 5/16" to 3/8" line sizes. A flow divider or valve member 46 is located in the valve chamber 42 and includes an elongated cylindrical body defining a through passage 48 and having a circular flange 50 adapted for engagement in substantially fluidright relation upon the valve seat 44. Specific details of the thermostat 54 will therefore be omitted for brevity. UP TO 60 DEGREE TEMP DROP FOR $59.99! At temperatures above 180° F. the valve member causes essentially all of the engine oil to circulate through the oil cooler. Use a pair of pliers to grab ahold of the nipple on the factory bypass valve and rotate the valve back and forth in its bore. Various modifications and changes may be made with regard to the foregoing detailed description without departing from the spirit of the invention. Unfortunately, the bimetallic valve commonly fails in the closed position, causing hot transmission fluid to constantly circulate right back into the transmission, never, or barely, passing through the cooler at all. To allow for improved transmission warmup, a thermostatic cold flow bypass valve has been incorporated into the transmission oil cooler. The ATS cooler block replaces the faulty design, eliminating the bypass valve and ensures 100% of the trans cooler flow is forced through the trans cooler. As we go to press, LinCo offers the only drop-in bypass valve like this in the aftermarket. The present valve actuation means is operative to move the valve member between its warm-up and cooling positions and comprises a thermally responsive element movable against the bias of a main bias means. Once in the factory block, the valve can be pressed straight down until it is fully seated. 2 and 3, causes the valve member 46 also to move to the left for eventual seating upon the valve seat 44. Allison 1000 L5P Transmission Cooler Thermostatic Bypass Upgrade All 2017+ L5P Duramax equipped GM/Chevy trucks have always been known to run hotter than then their early predecessors. Between my builder and I, we talked about a bypass with some valves and such, for the same reason as you, running in colder weather, it's not really needed. 708-4739P6, UPC 621859000111 One is through the cooler and back to the engine through the port 36, and another is from the port 34, through the valve chamber 42, and then through the port 36. With this upgrade the operating temperatures are typically maintained at around 70 degree celsius even under hard working conditions. I get my PML pan tomorrow so I might throw that on first. At the end of the test loop, the Allison was running a cool 107 degrees—a 49-degree drop from where we were with the stock bypass valve in the equation. The next time you drive your truck you’ll be seeing drastically lower transmission fluid temps. The spring rate of the spring 66 is greater than that of the spring 52. Next, we moved on to wrestling the factory air intake back into place, which is the most time-consuming part of the entire install. Transmission Cooler Bypass Valve - Read online for free. Installs in cooler line. Out in the real world, even bone-stock L5P owners are seeing ATF temps higher than 210 degrees. The thermostat 54 comprises an elongated body portion 56 coaxial with the valve chamber 42 and freely axially movable relative to the main spring 52. A valve actuating mechanism for an oil cooler bypass valve of the type in which a thermally responsive element expands to urge a valve member against a valve seat and thereby cause oil to flow through an oil cooler. Given its location in the engine bay, chances are good that the bypass valve is dirty, so hit it with a little brake cleaner and compressed air (or a rag) before you get started. The last piece of the factory bypass valve assembly to be removed is the spring (a very stiff spring). An angled pick works best for fishing the spring out. 60/605.2, 60/298, 165/52, 60/274, 60/320, 123/568.12, 60/288, 165/51, 60/287 . Thus, any movement of the spring retainer 60 to the left, as viewed in FIGS. The engine 12 is exemplary of a source of oil which is to be maintained at a desirable operating temperature, such as between 160° F.-180° F. It will be apparent that the present invention is equally suited for cooling transmission oil or the like. 2, which exists at an oil temperature of approximately 180° F., the flange 50 is seated upon the valve seat 44. The 99-03 stock 7.3L cooler is a 28k GVW model. 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Of this site constitutes acceptance of our before and after testing was conducted along the same as described... Is included in the Midwest, LinCo offers the only drop-in bypass valve, to!