{"product_id":"jp-group-valve-adjusting-screw-9mm-025109451-jp-8120-0","title":"JP Group Valve Adjusting Screw, 9 mm (M9) | VW Air-Cooled Type 1 \u0026 Type 3, Vanagon Wasserboxer | OE 025 109 451 (JP-8120-0)","description":"\u003ch2\u003eJP Group Valve Adjusting Screw, 9 mm (M9) — VW Air-Cooled \u0026amp; Vanagon Wasserboxer (JP-8120-0)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eShort answer:\u003c\/strong\u003e JP-8120-0 is a 9 mm (M9) valve adjusting screw, the threaded tappet screw in the end of each rocker arm that sets valve lash. JP Group cross-references it to VW OE 025 109 451 (JP ref 8111351706). EMPI lists it for air-cooled VW Type 1 and Type 3 rocker arms. It is also the 9 mm screw used on the 1983–1991 Vanagon Wasserboxer. Sold each; eight per engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart numbers:\u003c\/strong\u003e JP-8120-0 · OE 025 109 451 · JP Group 8111351706 · Dansk JP81200 · UPC 707924524550.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eVehicle\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1961–1974\u003c\/td\u003e\n\u003ctd\u003eVW Karmann Ghia\u003c\/td\u003e\n\u003ctd\u003ePer EMPI, 8 required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966–1973\u003c\/td\u003e\n\u003ctd\u003eVW Type 3 Fastback \u0026amp; Squareback\u003c\/td\u003e\n\u003ctd\u003ePer EMPI, 8 required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1973–1974\u003c\/td\u003e\n\u003ctd\u003eVW Thing\u003c\/td\u003e\n\u003ctd\u003ePer EMPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1978–1979\u003c\/td\u003e\n\u003ctd\u003eVW Beetle (late 9 mm rocker arms)\u003c\/td\u003e\n\u003ctd\u003ePer Heritage Parts Centre for OE 025 109 451\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1983–1991\u003c\/td\u003e\n\u003ctd\u003eVW Vanagon 1.9 \/ 2.1 Wasserboxer\u003c\/td\u003e\n\u003ctd\u003ePer FCP Euro \/ Heritage for OE 025 109 451\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAny\u003c\/td\u003e\n\u003ctd\u003eRocker arms with 8 mm threads\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003eDoes not fit\u003c\/strong\u003e — most 1961–1977 Type 1 rockers use the 8 mm screw 043 109 451. Measure your thread first.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cem\u003eFitment note:\u003c\/em\u003e VW used both 8 mm and 9 mm adjusters on the air-cooled engine depending on the rocker arm. EMPI's own fitment list is partly cut off, so confirm your thread size before ordering. Your existing screw is 9 mm if the thread measures about 9 mm across (M9 x 1).\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eJP Group (Denmark), distributed by EMPI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart number\u003c\/td\u003e\n\u003ctd\u003eJP-8120-0\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOE reference\u003c\/td\u003e\n\u003ctd\u003e025 109 451\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJP Group reference\u003c\/td\u003e\n\u003ctd\u003e8111351706\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003e707924524550\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThread\u003c\/td\u003e\n\u003ctd\u003e9 mm (M9 x 1)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApprox. 0.05 lb (estimate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold as\u003c\/td\u003e\n\u003ctd\u003eEach — 8 per engine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eOne valve adjusting screw.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eNot Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLock nuts (sold separately; order the 9 mm nut to match)\u003c\/li\u003e\n\u003cli\u003eRocker arms, rocker shafts and valve cover gaskets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhy It Matters\u003c\/h3\u003e\n\u003cp\u003eThe adjusting screw is the contact point between the rocker arm and the valve stem. Each time the valve opens, the ball end of the screw pushes on the stem. Over many miles the tip wears flat or pits, and the slot and thread get chewed up from repeated adjustment. A worn tip makes valve lash impossible to set accurately: the feeler gauge reads right, but the clearance is wrong because the tip is dished. That leads to a noisy valve train, burnt exhaust valves when lash closes up, and lost power. Replacing worn screws is cheap and is the first fix for a valve train that will not stay quiet after adjustment.\u003c\/p\u003e\n\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdjust valves only on a cold engine. Bring each cylinder to top dead center on its compression stroke.\u003c\/li\u003e\n\u003cli\u003eBack off the lock nut, unscrew the old screw and thread in the new one with its lock nut.\u003c\/li\u003e\n\u003cli\u003eSet lash with a feeler gauge to the specification for your engine (see the Bentley manual or the sticker on the fan shroud), hold the screw with a screwdriver and tighten the lock nut.\u003c\/li\u003e\n\u003cli\u003eRe-check lash after tightening, and fit new valve cover gaskets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit my 1971 Beetle?\u003c\/strong\u003e\u003cbr\u003eOnly if your rocker arms use 9 mm screws. Most 1961–1977 Type 1 rockers use the 8 mm screw. Measure the old one before ordering.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e8 mm or 9 mm — how do I tell?\u003c\/strong\u003e\u003cbr\u003eMeasure the threaded shank of the old screw with calipers. About 8 mm across is the 8 mm version; about 9 mm across is this part.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this the same as OE 025 109 451?\u003c\/strong\u003e\u003cbr\u003eYes. EMPI and JP Group cross-reference JP-8120-0 to VW 025 109 451.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it fit a Vanagon?\u003c\/strong\u003e\u003cbr\u003eFCP Euro and Heritage list 025 109 451 for the 1983–1991 Vanagon Wasserboxer, which uses the same 9 mm screw.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many do I need?\u003c\/strong\u003e\u003cbr\u003eEight per engine, one per valve. Many owners replace all eight with new lock nuts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat else do I need?\u003c\/strong\u003e\u003cbr\u003eMatching 9 mm lock nuts and a set of valve cover gaskets.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it new?\u003c\/strong\u003e\u003cbr\u003eYes. New, supplied by JP Group of Denmark through EMPI.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"\/collections\/engine\"\u003eEngine Parts \u0026amp; Performance\u003c\/a\u003e \u003ca href=\"\/collections\/vw-type-3\"\u003eVW Type 3 Parts\u003c\/a\u003e \u003ca href=\"\/collections\/vw-karmann-ghia\"\u003eVW Karmann Ghia Parts\u003c\/a\u003e \u003ca href=\"\/collections\/vw-vanagon\"\u003eVW Vanagon Parts\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003e\u003cb\u003eCalifornia Prop 65 Warning:\u003c\/b\u003e This product can expose you to chemicals including lead and\/or lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit \u003ca href=\"https:\/\/www.p65warnings.ca.gov\/\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e. Legal for use on pre-pollution-controlled vehicles only.\u003c\/small\u003e\u003c\/p\u003e","brand":"JP Group","offers":[{"title":"Default Title","offer_id":67100822044787,"sku":"JP-8120-0","price":3.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/8111351706.jpg?v=1793697884","url":"https:\/\/www.washburnsmetal.com\/products\/jp-group-valve-adjusting-screw-9mm-025109451-jp-8120-0","provider":"Washburn's Metal","version":"1.0","type":"link"}