audi a4 egr valve operation
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Filed Under (Ford) by admin on 17-03-2011
NOTE: Hydraulic valve lifters are used; no valve adjustment is required. When valve and/or valve seat is machined, valve clearance is reduced and may cause improper valve operation. Different length push rods are available for correcting clearance. Valve lifter must be collapsed to check valve clearance. 1. With valve cover removed, position piston No. 1 at TDC of compression stroke. Completely collapse cylinder No. 1 intake valve lifter and hold valve lifter collapsed. Using feeler gauge, measure clearance between rocker arm and valve stem. 2. Clearance should be within specification. Refer to COLLAPSED VALVE LIFTER CLEARANCE table. Replace push rod, if necessary, to obtain correct clearance. 3. Position crankshaft as specified. See, in this article, VALVE CLEARANCE CHECKING SEQUENCE table, and check appropriate valves. Replace push rods if clearance is not within specification. 4. If push rod(s) is replaced, ensure corresponding cylinder piston is below TDC. It will be necessary to loosen or remove rocker arm to replace push rod. CAUTION: DO NOT operate or crank engine after installing push rod until valve lifter has leaked down to normal operating position. COLLAPSED VALVE LIFTER CLEARANCE
Filed Under (Nissan) by admin on 31-12-2010
IF YOU CONFIRM: • DTC P0400 (EGR) or P0402 (EGRC-BPT Valve) is stored in the ECM, and/or • The vehicle exhibits rough running or other drivability incidents, and/or • Difficulty in setting the EGR System Readiness Test (SRT) status to CMPLT. ACTION: Clean the intake manifold EGR ports.SERVICE PROCEDURE 1. Remove the throttle chamber assembly and place it aside. • Refer to the EM section of the appropriate Service Manual (ESM). NOTE: It is not necessary to completely remove the throttle chamber assembly. • Only remove harness connectors, cables, and hoses necessary to allow the throttle chamber assembly to be placed aside. • Throttle chamber coolant hoses do not need to be removed. NOTE: Figure 1 gives a general location of the plugs for the EGR ports, but the plugs are not visible in the photo. 2/4 2. Remove the EGR valve mounting bolts and then move the EGR valve outward about ½ inch (see Figure 2). • This is so you can remove the plug for the “rear most” EGR port. NOTE: You don’t need to completely remove the EGR valve. Rear Most EGR Port. EGR Valve EGR Mounting Bolts Move about ½ inch. Figure 2 3. Remove the plugs for the EGR ports (see Figure 3). Figure 3
Filed Under (Suzuki) by admin on 26-05-2011
NOTE: Samurai & Sidekick 1) Remove rocker cover. Rotate crankshaft until zero degree (TDC) timing mark of timing belt cover is in line with timing mark on crankshaft pulley. 2) Cylinder No. 1 should be at TDC on compression stroke. Remove distributor cap, and ensure rotor is pointed upward at distributor hold-down bolt and to No. 1 terminal of distributor cap. If not as described, rotate crankshaft 360 degrees. 3) Measure valve clearance between adjustment screw and valve stem using thickness gauge. Check intake valve clearance of cylinders No. 1 and 2 and exhaust valve clearance of cylinders No. 1 and 3. 4) Turn crankshaft one complete revolution (360 degrees). Check intake valve clearance of cylinders No. 3 and 4 and exhaust valve clearance of cylinders No. 2 and 4. Ensure clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS table. 5) If clearance adjustment is necessary, loosen lock nut and turn adjusting screw. After adjusting clearance, tighten adjusting Swift DOHC uses hydraulic lifters. Adjustment is not required. screw lock nut to 11-14 ft. lbs. (15-19 N.m) on Samurai or 90-108 INCH lbs. (10-13 N.m) on Sidekick. On all models, recheck clearance. VALVE CLEARANCE SPECIFICATIONS TABLE ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ Application SOHC Engines Samurai, Sidekick 8-Valve TBI & Swift (1) Engine Cold Exhaust ……………………. .006-.008 (.15-.20) Intake …………………….. .005-.007 (.13-.17) Engine Hot Exhaust ……………………. .010-.012 (.25-.30) Intake …………………….. .009-.011 (.23-.27) Sidekick 16-Valve PFI Engine Cold Exhaust & Intake ………….. .0031-.0047 (.08-.12) Engine Hot Exhaust & Intake ………….. .0047-.0063 (.12-.16) DOHC Engine Swift (1) …………………………………. (2) (1) – Swift is available with 1.3L DOHC and SOHC engines. (2) – Hydraulic valve lash adjusters are used. Adjustment is not required. ¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡ Swift SOHC 1) Remove rocker cover. Remove right side inner fender apron extension to enable timing marks to be seen. Align crankshaft pulley timing mark with TDC mark on timing belt cover. 2) Remove distributor cap. Ensure rotor is pointing upward toward distributor hold-down bolt and to No. 1 terminal of distributor cap. If not as described, rotate crankshaft 360 degrees. 3) Measure valve clearance between adjustment screw and valve stem using thickness gauge. Check intake valve clearance of cylinders No. 1 and 2 and exhaust valve clearance of cylinders No. 1 and 3. Turn crankshaft one complete revolution (360 degrees). Check intake valve clearance of cylinders No. 3 and 4 and exhaust valve clearance of cylinders No. 2 and 4. 4) Ensure clearance is within specification. See VALVE CLEARANCE SPECIFICATIONS table. If clearance adjustment is necessary, loosen lock nut and turn adjusting screw. Hold adjusting screw while tightening lock nut to 11-14 ft. lbs. (15-19 N.m). Recheck clearance. In. (mm)
Filed Under (Nissan) by admin on 31-12-2010
IF YOU CONFIRM The MIL is ON and code P1402 EGR OPEN is stored in the ECM. ACTION • Inspect the EGR valve for metallic debris. See the Service Information section of this bulletin for the specific inspection procedure. • If metallic debris is present, replace the Bank 1 catalyst and EGR valve. SERVICE INFORMATION 1. Remove the EGR valve as per the EM section of the respective ESM. 2. Inspect the EGR valve for metallic flake debris. (see Figures 1 and 2) 3. If metallic debris is present in the EGR valve, remove Bank 1 catalyst (rear of engine) as per EM section of the respective ESM. 4. Inspect both the top and bottom of the catalyst. • Bank 1 Catalyst–viewed from the top. (see Figure 3) 5. If the catalyst has loose material as seen if Figure 3 above, blow out the debris from interior of Bank 1 exhaust manifold. Remove the EGR valve and tube, and then blow out any debris from the EGR valve and tube. 6. Replace the Bank 1 catalyst and EGR valve in the reverse order of removal. 7. Clear stored code P1402 from the ECM memory.
Filed Under (Ford) by admin on 16-10-2010
REMOVAL NOTE: The oil pump and valve body are removed as an assembly. 1. Disconnect battery ground cable, then remove battery, battery tray, and remote air cleaner. 2. Position supply hoses, vacuum hoses, and wiring away from pump and valve body cover. 3. Remove shift lever. 4. On models equipped with Anti-lock Brake System (ABS) , remove splash shield cover, then disconnect brake reservoir hose and cap to prevent contamination. 5. On all models, remove EGR bracket attaching bolts, then install lifting eye. 6. Remove throttle body bracket attaching bolt, install lifting eye, then using suitable equipment support engine. 7. Remove lefthand transaxle mount. 8. Remove transaxle side pan upper attaching bolts. 9. Raise and support vehicle. 10. Remove lefthand front wheel and tire assembly. 11. Remove inner fender cover and position aside, then disconnect ride height sensor. 12. Remove rear transaxle mount attaching bolt. 13. Loosen but do not remove two lefthand subframe attaching bolts. 14. Remove two engine support mount attaching bolts. 15. Remove four lefthand engine support attaching bolts, then remove the engine support. 16. Position suitable drain pan, then remove remaining transaxle side pan attaching bolts and remove pan. 17. Using suitable screwdriver, place manual shift shaft in Park position. 18. Disconnect upper bulkhead electrical connector wiring retainer clip from valve body. 19. Disconnect electrical connectors. Oil Pump And Valve Body Bolt Removal 20. Remove valve body attaching bolts, then disengage linkage and remove valve body. NOTE: Do not remove oil pump cover attaching bolts. INSTALLATION 1. Install new pump and valve body to chain cover gasket. 2. Slide pump and valve body onto pump shaft. 3. Rotate pump and valve body assembly toward dash panel, then engage manual valve link with manual valve. 4. Slightly rotate pump and valve body assembly to engage oil pump shaft splines with oil pump rotor splines. Valve body should slide flush with chain cover. A suitable 7/8 inch deep well socket on crankshaft pulley may be required for complete engagement. 5. On models less anti-skid, if engagement is not as indicated in step 4, proceed as follows: a. Remove manual valve from valve body. b. Rotate assembly to allow full engagement, up to 360° . c. After full engagement, return assembly to installed position, then install manual valve.