{"id":2885,"date":"2023-11-17T23:27:08","date_gmt":"2023-11-17T22:27:08","guid":{"rendered":"https:\/\/mbci.mackuz.ovh\/?p=2885"},"modified":"2023-11-17T23:27:08","modified_gmt":"2023-11-17T22:27:08","slug":"removal-and-installation-of-chain-tensioner-2","status":"publish","type":"post","link":"https:\/\/mbci.mackuz.ovh\/index.php\/2023\/11\/17\/removal-and-installation-of-chain-tensioner-2\/","title":{"rendered":"Removal and installation of chain tensioner"},"content":{"rendered":"

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05\u2014310 Removal and installation of chain tensioner<\/strong><\/div>\n<\/div>\n<\/td>\n
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Tightening torques<\/div>\n<\/div>\n<\/td>\n
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Nm<\/div>\n<\/div>\n<\/td>\n
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Nuts for cylinder head cover<\/div>\n<\/div>\n<\/td>\n
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15<\/div>\n<\/div>\n<\/td>\n
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Closing plug for chain tensioner<\/div>\n<\/div>\n<\/td>\n
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90<\/div>\n<\/div>\n<\/td>\n
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Special tool<\/div>\n<\/div>\n<\/td>\n
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Socket 27 mm, 1\/2″ square, for rotating engine<\/div>\n<\/div>\n<\/td>\n
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001 589 65 09 00<\/div>\n<\/div>\n<\/td>\n
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This engine is provided with a hydraulic detent chain tensioner without valve.<\/div>\n
The pressure required for tensioning timing chain comprises the force of the compression spring (77) and the oil pressure in chain tensioner, in depend\u00adence of engine oil pressure.<\/div>\n<\/div>\n<\/td>\n
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In the event of shock-type loads, a throttle bore (a) of 1.5 mm dia. in oil feed and a throttle bore (b) of 1.3 mm dia. in thrust bolt prevents fast flowing-off of oil.<\/div>\n<\/div>\n<\/td>\n
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77<\/div>\n<\/div>\n<\/td>\n
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35<\/div>\n<\/div>\n<\/td>\n
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Cylinder head<\/div>\n<\/div>\n<\/td>\n
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83<\/div>\n<\/div>\n<\/td>\n
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Chain tensioner<\/div>\n<\/div>\n<\/td>\n
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housing<\/div>\n
78<\/div>\n<\/div>\n<\/td>\n
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75<\/div>\n<\/div>\n<\/td>\n
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Closing plug<\/div>\n<\/div>\n<\/td>\n
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Gasket<\/div>\n<\/div>\n<\/td>\n
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76<\/div>\n<\/div>\n<\/td>\n
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Sealing ring<\/div>\n<\/div>\n<\/td>\n
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85<\/div>\n<\/div>\n<\/td>\n
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Tensioning rail<\/div>\n<\/div>\n<\/td>\n
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83<\/div>\n<\/div>\n<\/td>\n
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77<\/div>\n<\/div>\n<\/td>\n
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Compression spring<\/div>\n<\/div>\n<\/td>\n
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78<\/div>\n<\/div>\n<\/td>\n
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Detent spring<\/div>\n<\/div>\n<\/td>\n
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a<\/div>\n<\/div>\n<\/td>\n
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Throttle bore 1.<\/div>\n<\/div>\n<\/td>\n
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5 mm dia.<\/div>\n
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79<\/div>\n<\/div>\n<\/td>\n
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Pressure bolt<\/div>\n<\/div>\n<\/td>\n
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Throttle bore 1.<\/div>\n<\/div>\n<\/td>\n
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3 mm dia.<\/div>\n<\/div>\n<\/td>\n
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The chain tensioner housing (83) holds a detent and on pressure bolt (79) a detent spring (78).<\/div>\n
The pressure bolt moves forward from detent to detent in accordance with elongation of chain. Travel to the rear is limited by detents. As a result, the pres\u00adsure bolt cannot be pushed back when the engine is stopped. Any jumping of the loose timing chain or any chain noise when the engine is started is therefore eliminated.<\/div>\n<\/div>\n<\/td>\n
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05.8-310\/1 F2<\/div>\n<\/div>\n<\/td>\n
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The oil required for operation of chain tensioner is provided via first camshaft bearing, the cylinder head bolt bore at front right and a transverse duct in cylinder head.<\/div>\n
During assembly and test jobs on chain drive, the chain tensioner need not be removed. In such cases it will be enough to remove the compression spring (77) (item 3, 4, 11 and 12).<\/div>\n<\/div>\n<\/td>\n
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If, on the other hand, parts of the chain drive are renewed, remove chain tensioner and set pressure bolt into assembly position.<\/div>\n
When installing a new chain tensioner, also pay atten\u00adtion to assembly position (A). If the pressure bolt is too far forward (in last detent), the timing chain is extensively tensioned or the detent spring (78) is stuck in detent.<\/div>\n<\/div>\n<\/td>\n
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A Chain tensioner in assembly position B Chain tensioner in operating position<\/div>\n<\/div>\n<\/td>\n
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On engine 617.950 starting with engine end No. 006223, the chain tensioner gasket (B) has been installed for reasons of standardization with engines 615, 616 and 617.912. On engines 617.951\/952 from start of series.<\/div>\n<\/div>\n<\/td>\n
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A 1st version B 2nd version<\/div>\n<\/div>\n<\/td>\n
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Removal<\/strong><\/div>\n<\/div>\n<\/td>\n
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1\u00a0 \u00a0 Drain coolant.<\/div>\n
2\u00a0 \u00a0On engines with EGR <@), remove pipe line be\u00adtween EGR valve and exhaust manifold (arrow). For this purpose, unscrew shielding plate (10).<\/div>\n<\/div>\n<\/td>\n
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05.8-310\/2 F2<\/div>\n<\/div>\n<\/td>\n
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3 On model 123 with level control, unscrew line holder on thermostat housing (arrow).<\/div>\n<\/div>\n<\/td>\n
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4 Remove thermostat housing.<\/div>\n<\/div>\n<\/td>\n
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5 Unscrew closing plug (75) of chain tensioner.<\/div>\n
Attention!<\/div>\n
Closing plug is under pressure of compression spring (77).<\/div>\n<\/div>\n<\/td>\n
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6 Remove compression spring (77).<\/div>\n<\/div>\n<\/td>\n
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7 Unscrew chain tensioner housing and pull out.<\/div>\n<\/div>\n<\/td>\n
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05.8-310\/3 F 2<\/div>\n<\/div>\n<\/td>\n
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8\u00a0 \u00a0Pull out pressure bolt (79) in forward direction.<\/div>\n
9\u00a0 \u00a0Thoroughly clean all parts.<\/div>\n<\/div>\n<\/td>\n
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Installation<\/strong><\/div>\n<\/div>\n<\/td>\n
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Note: <\/strong>Prior to installing chain tensioner, the chain drive must be completely mounted.<\/div>\n
10 Rotate engine with tool combination in direction, of rotation once, so that timing chain is under tension.<\/div>\n<\/div>\n<\/td>\n
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11 Insert chain tensioner housing (83) with new gasket (84) and tighten.<\/div>\n<\/div>\n<\/td>\n
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75<\/strong>\u00a0 \u00a0Closing plug<\/strong><\/div>\n
76<\/strong>\u00a0 \u00a0Sealing ring<\/strong><\/div>\n
77<\/strong>\u00a0 \u00a0 Compression spring<\/strong><\/div>\n
78<\/strong>\u00a0 \u00a0 Detent spring<\/strong><\/div>\n
79<\/strong>\u00a0 \u00a0Pressure bolt<\/strong><\/div>\n
83<\/strong>\u00a0 \u00a0 Chain tensioner housing<\/strong><\/div>\n<\/div>\n<\/td>\n
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12\u00a0 \u00a0 Place pressure bolt (79) on assembly detent.<\/div>\n
13\u00a0 \u00a0 Insert compression spring (77).<\/div>\n
14\u00a0 \u00a0Position closing plug (75) with new sealing ring (76) and tighten to 90 Nm.<\/div>\n<\/div>\n<\/td>\n
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15 For further installation proceed vice versa to removal.<\/div>\n<\/div>\n<\/td>\n
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05.8-310\/4 F2<\/strong><\/div>\n<\/div>\n<\/td>\n
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    05\u2014310 Removal and installation of chain tensioner   Tightening torques   Nm Nuts for cylinder head cover   15 Closing plug for chain tensioner   90 Special tool     Socket 27 mm, 1\/2″ square, for rotating engine   001 589 65 09 00   Note   This engine is provided with a hydraulic detent chain tensioner without valve. The pressure required for tensioning timing chain comprises the force of the compression spring (77) and the oil pressure in chain tensioner, in depend\u00adence of engine oil pressure.   In the event of shock-type loads, a throttle bore (a) of 1.5 mm dia. in oil feed and a throttle bore (b) of 1.3 mm dia. in thrust bolt prevents fast flowing-off of oil.         77 35 Cylinder head 83 Chain tensioner housing 78 75 Closing plug 84 Gasket   76 Sealing ring 85 Tensioning rail 83 77 Compression spring       78 Detent spring a Throttle bore 1. 5 mm dia. 35 79 Pressure bolt b Throttle bore 1. 3 mm dia.   The chain tensioner housing (83) holds a detent and on pressure bolt (79) a detent spring (78). The pressure bolt moves forward from detent to detent in accordance with elongation of chain. Travel to the rear is limited by detents. As a result, the pres\u00adsure bolt cannot be pushed back when the engine is stopped. Any jumping of the loose timing chain or any chain noise when the engine is started is therefore eliminated.   05.8-310\/1 F2       The oil required for operation of chain tensioner is provided via first camshaft bearing, the cylinder head bolt bore at front right and a transverse duct in cylinder head. During assembly and test jobs on chain drive, the chain tensioner need not be removed. In such cases it will be enough to remove the compression spring (77) (item 3, 4, 11 and 12).   If, on the other hand, parts of the chain drive are renewed, remove chain tensioner and set pressure bolt into assembly position. When installing a new chain tensioner, also pay atten\u00adtion to assembly position (A). If the pressure bolt is too far forward (in last detent), the timing chain is extensively tensioned or the detent spring (78) is stuck in detent. A Chain tensioner in assembly position B Chain tensioner in operating position   On engine 617.950 starting with engine end No. 006223, the chain tensioner gasket (B) has been installed for reasons of standardization with engines 615, 616 and 617.912. On engines 617.951\/952 from start of series. A 1st version B 2nd version   Removal 1\u00a0 \u00a0 Drain coolant. 2\u00a0 \u00a0On engines with EGR <@), remove pipe line be\u00adtween EGR valve and exhaust manifold (arrow). For this purpose, unscrew shielding plate (10).   05.8-310\/2 F2       3 On model 123 with level control, unscrew line holder on thermostat housing (arrow).   4 Remove thermostat housing.   5 Unscrew closing plug (75) of chain tensioner. Attention! Closing plug is under pressure of compression spring (77).   6 Remove compression spring (77). 7 Unscrew chain tensioner housing and pull out.   05.8-310\/3 F 2       8\u00a0 \u00a0Pull out pressure bolt (79) in forward direction. 9\u00a0 \u00a0Thoroughly clean all parts.   Installation   Note: Prior to installing chain tensioner, the chain drive must be completely mounted. 10 Rotate engine with tool combination in direction, of rotation once, so that timing chain is under tension.   11 Insert chain tensioner housing (83) with new gasket (84) and tighten.   75\u00a0 \u00a0Closing plug 76\u00a0 \u00a0Sealing ring 77\u00a0 \u00a0 Compression spring 78\u00a0 \u00a0 Detent spring 79\u00a0 \u00a0Pressure bolt 83\u00a0 \u00a0 Chain tensioner housing   12\u00a0 \u00a0 Place pressure bolt (79) on assembly detent. 13\u00a0 \u00a0 Insert compression spring (77). 14\u00a0 \u00a0Position closing plug (75) with new sealing ring (76) and tighten to 90 Nm. 15 For further installation proceed vice versa to removal.   05.8-310\/4 F2        <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","footnotes":""},"categories":[48,44],"tags":[],"class_list":["post-2885","post","type-post","status-publish","format-standard","hentry","category-engine-timing-valves","category-om617"],"aioseo_notices":[],"featured_image_src":null,"author_info":{"display_name":"mackuz","author_link":"https:\/\/mbci.mackuz.ovh\/index.php\/author\/mackuz\/"},"_links":{"self":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2885","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/comments?post=2885"}],"version-history":[{"count":1,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2885\/revisions"}],"predecessor-version":[{"id":2886,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/posts\/2885\/revisions\/2886"}],"wp:attachment":[{"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/media?parent=2885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/categories?post=2885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mbci.mackuz.ovh\/index.php\/wp-json\/wp\/v2\/tags?post=2885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}