1985 3.0 GM Torque Specs help

Jeffgrant00

Cadet
Joined
May 15, 2017
Messages
14
Hello all!
I have been creeping all over the internet trying to find as much info on my new boat before I dive in too deep and am not having much luck.
I have a 1985 Omc stern drive with a 3.0 GM manual shift. I had water in the oil and the head was warped 9 thousanths so after a trip to the local machine shop I have a shiny like new head that I am dying to install! My question is on the head bolt torque specs and sequence. I have already been to the adults only thread and attempted to download the manuals and am having no luck. I am not shure if the link is dead or if its something that i am doing wrong.
If anyone has manuals available for download or torque specs to share any and all info would be GREATLY appreciated!

Thanks in advance
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
47,306
Welcome aboard

its usually on the package the head gasket came in, as for sequence, start with a bolt in the middle and circle outward

fetch


however here you go for specs

181 CID/ 3.0L Torque Specifications
DESCRIPTIONLb. In.Lb. Ft.N[SUP].[/SUP]m
Camshaft Sprocket Bolts80 9
Connecting Rod Cap Nuts 4561
Cylinder Head Bolts 90 (Note 1)122 (Note 1)
Distributor Clamp 2027
Marine Engine Coupler to Flywheel 3547
Flywheel Housing to Block 2128
Flywheel to Crankshaft Bolts 6588
Front Cover Bolts30 3.4
Front Mount to Block 2128
Main Bearing Cap Bolts 6588
Manifold to Head 23 (Note 2)31 (Note 2)
Oil Pan Bolts-Crankcase80 9
Oil Pan Bolts-to Front Cover45 5
Oil Pan Studs to Oil Seal Retainer or Crankcase15 1.7
Oil Pump Cover72 8
Oil Pump to Block120 14
Oil Pump Pickup60 7
Rocker Arm Cover and Bolts40 4.5
Rear Crankshaft Oil Seal Retainer Nuts135 15
Spark Plugs 2230
Starter Motor to Block 3750
Timing Gear Cover72 8
Torsional Damper Bolt 5068
Water Pump to Block 1520
Note 1: Retorque after first 20 hours of operation.
Note 2: Retorque after first start up.
 
Top