Mercruiser 2005 & Newer 5.0L/5.7L/6.2L Coated Cast Iron Dry Joint Exhaust Manifold & Tall Riser Kit (#EK-MERC-V8-C-NS-DJ-TALL)
Part #: EK-MERC-V8-C-NS-DJ-TALL
This product is no longer available.
Why Pay Double for Mercruiser OEM Dry Joint Exhaust Systems?
Direct replacement "Internally & Externally EDP Coated" DRY JOINT exhaust kit for MerCruiser V8 engines USING THE 864591T02 TALL EXHAUST RISER/ELBOW. This product replaces the OEM MerCruiser product which they do not package in a complete kit. This kit also includes all of the appropriate mounting gasket/fastener kits.
In 2002 Mercruiser changed on the V6 and Small Block V8 engines from the standard style of exhaust to the newer Dry Joint Exhaust systems. The purpose of this was to reduce the risk of leakage at the gasket between the manifold and exhaust riser. It should also be noted that the height and down angle of the exhaust elbow changed as well. It was felt that the overall height of the exhaust elbow should be raised to meet the total height of the engine. Therefore in 2005 Mercruiser created the 1.5" taller exhaust elbow which included a 14 degree down angle versus the standard 7 degree. This then created an issue regarding the use of risers. For example when 3" risers/spacers are installed along with the taller elbow this means the overall height of that installation was taller than the previous installation with 3" risers. Therefore Mercruiser created the 1.7" and 4.5" riser/spacer to account for these installations where the standard 3" & 6" spacers were already at a package height limit.
Short Dry Joint Elbow p/n 864309T02 s/n 0W309999 and below (pre 2005 models) - Measures 5.2" from elbow flange to mounting bolt boss pad. SELECT THIS LINK TO VIEW EXHAUST DRAWING.
Tall Dry Joint Elbow p/n 864591T02 s/n 0W310000 and above (post 2005 models) - Measures 6.7" from elbow flange to mounting bolt boss pad. SELECT THIS LINK TO VIEW EXHAUST DRAWING.
NOTE: Do not use stainless steel or grade 2 bolts to install the risers or elbows. These bolts are too soft and will not hold a torque setting, which can cause leaks at the gasket surface. Bolt torque should be reset after initial startup, while the engine is still warm. Refer to your original manufacturer's engine service manual for specific torque settings.
As a rule of thumb we suggest 23 Lb-Ft for a 3/8 lubricated fasteners threading into cast iron, 26 Lb-Ft for a 3/8 dry fasteners threading into cast iron and 18 - 20 Lb-Ft for 3/8 fasteners threading into Aluminum.
HOWEVER THE MOST IMPORTANT THING TO REMEMBER WHEN TORQUING MARINE EXHAUST PRODUCTS IS TO PERFORM IN A UNIFORM PATTERN IN ABOUT 2-3 SEPARATE SEQUENCES. 1) 5 LB-FT FOLLOWED BY GOING ON UP TO 10 - 15 LB-FT THEN FOLLOWED BY TAKING THE TORQUE UP TO THE FINAL RATING. THE TORQUE SHOULD THEN BE CHECKED AFTER RUNNING THE ENGINE FOR 30 MINUTES THEN AGAIN AFTER 20 HOURS.
Never use anti-seize type products on bolts or studs as this can allow for loosening of the parts.
Studs: To prevent studs from backing out and causing leaks which can cause engine damage, use red thread locking compound. Follow the manufacturers recommendations for their installation and removal. Do not use anti-sieze on bolts or studs as it is a lubricant and will cause fastener to back out.
NOTE: This kit includes: 2 x Exhaust Manifolds, 2 x Exhaust Elbow/Risers as well as all of the required fasteners and gaskets.
These Manifolds included in this kit are compatible with the following engines and risers:
Engines | |
---|---|
MerCruiser SB V8 | GM 5.0, 5.7 & 6.2 V8 Engines |
Risers | |
104309C | 4" Exhaust Outlet, 7 DEG Down Angle, 6.72" in Height, Center Dry Joint Riser |
864309T02 | MerCruiser OEM 7 DEG Down Angle "SHORT" Dry Joint Exhaust Riser |
864591T02 | MerCruiser OEM 14 DEG Down Angle "TALL" Dry Joint Exhaust Riser |
MC-20-864591 | Barr Marine Dry Joint Exhaust Riser |
9-40560 | Mallory Dry Joint Exhaust Riser |
These risers fit with following engines and manifolds:
Engines | |
---|---|
MerCruiser V6 & V8 | GM 4.3, 5.0, 5.7 & 6.2 Engines. |
Manifolds | |
105735C | PPT Dry Joint GM V8 Exhaust Manifold |
865735A02 | Mercruiser Dry Joint GM V8 Exhaust Manifold |