Technical Service Bulletin Hydraulic Chain Tensioner Kit

Subject: Hydraulic Chain Tensioner Kit            Models: 911 1984

Bulletin Number: 84 – 01

Hydraulic chain tensioners were introduced with the start of production for the 1984 Model Year. These new chain tensioners may be retrofit to all 1968 and later 911 vehicles by using the following conversion kits:

Installation kit for left chain tensioner

Part No. 930.105.911.00

Consists of:

1 cover, left                                        Part No. 930.105.063.08

1 plug                                                    N 016.155.3

1 seal                                                    N 013.814.2

1 oil hose                                            930.107.347.01

1 chain tensioner                             930.105.058.03

1 seal                                                    999.701.690.40

1 hollow union bolt                         N 021.073.1

2 seals                                                  N 013.807.2

1 coupling nut                                   900.104.003.02

1 self-tapping ring                            N 020.825.1

Installation kit for right chain tensioner

Part No. 930.105.912.01

Consists of:

1 cover, right                                      Part No. 930.105.064.07

1 oil hose                                            930.107.348.02

1 oil hose                                             930.107.348.03

1 chain tensioner                             930.105.058.03

1 seal                                                    999.701.90.40

1 hollow union bolt                         N 021.073.1

2 seals                                                  N 013.807.2

1 coupling nut                                   900.104.003.02

1 self-tapping ring                            N 020.825

Installation Procedure

Note

The procedure for installing hydraulic chain tensioners is the same as for replacing the non-hydraulic version.

  • Remove timing case covers
  • Install new hydraulic tensioners in place of original tensioners.

Note:

The chain tensioners each have an oil feed boss which will protrude through bores in the new timing case covers. External oil lines connect to this inlet and a fitting on the new camshaft supply hoses

  • Mount O-ring seals on oil feed boss of chain tensioners to provide seal between tensioners and timing case covers
  • Install new timing case covers
  • Replace oil supply hoses to camshafts with hoses supplied in kits.

Additional Parts Required

1 –           Adaptor Block        Part No. 911.107.704.00

2            Seal Ring                                   N 013.812.5-

3–            Hollow Union Bolt                   91.107.709.01

4–            Threaded Plug                         900.219.009.30

5–            Seal Ring                                      900.123.009.20

Note

On 1968 through 1973 Models, the right side oil supply hose will be not long enough as provided. To correct, install adapter block where inboard end of hose connects to case.

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