Question about Volvo 3.0 exhaust manifold

[Tstew]

Good morning. I have the exhaust manifold off. I’m replacing the gasket and manifold itself. Any other maintenance items I need to do while this is off? My first time doing this. Also, does anyone know torque specs on the manifold and head bolts? I’d appreciate it. the manifold is leaking and bubbling gas where it meets the head is reason for replacement .

 

[Scott Danforth]

first, welcome aboard

find out why it was leaking. if this is a salt water boat, your manifold most likely needs replacing.

181 CID/ 3.0L Torque Specifications

DESCRIPTION	Lb. In.	Lb. Ft.	N[SUP].[/SUP]m
Camshaft Sprocket Bolts	80		9
Connecting Rod Cap Nuts		45	61
Cylinder Head Bolts		90 (Note 1)	122 (Note 1)
Distributor Clamp		20	27
Marine Engine Coupler to Flywheel		35	47
Flywheel Housing to Block		21	28
Flywheel to Crankshaft Bolts		65	88
Front Cover Bolts	30		3.4
Front Mount to Block		21	28
Main Bearing Cap Bolts		65	88
Manifold to Head		23 (Note 2)	31 (Note 2)
Oil Pan Bolts-Crankcase	80		9
Oil Pan Bolts-to Front Cover	45		5
Oil Pan Studs to Oil Seal Retainer or Crankcase	15		1.7
Oil Pump Cover	72		8
Oil Pump to Block	120		14
Oil Pump Pickup	60		7
Rocker Arm Cover and Bolts	40		4.5
Rear Crankshaft Oil Seal Retainer Nuts	135		15
Spark Plugs		22	30
Starter Motor to Block		37	50
Timing Gear Cover	72		8
Torsional Damper Bolt		50	68
Water Pump to Block		15	20

 

[Tstew]

Thanks Scott.
its a freshwater boat.
the manifold was cracked on bottom from previous owner not winterizing it. I’m trying to get the boat and engine sorted.

 

[Tstew]

Thanks Scott.
its a freshwater boat.
the manifold was cracked on bottom from previous owner not winterizing it. I’m trying to get the boat and engine sorted.