Thermex Manifold Heat Exchangers

Thermex Manifold Heat Exchangers can be supplied as an exhaust gas cooler or they can be combined with a heat exchanger to cool the engine jacket water also. Cooling the exhaust gas on a marine engine allows for a flexible exhaust pipe to be used instead of a rigid pipe which makes installation easier. Bringing the exhaust gas temperature down also reduces the risk of fire on board a marine vessel.

Cooling water can be sourced direct from the water upon which the vessel floats on or in the case of a keel-cooled system, the water is contained in a closed loop which is cooled by passing the water through a series of pipes in the vessel's keel.

Thermex Manifold Heat Exchangers, aka "Manicoolers" are manufactured from our unique extruded shells which allows us to supply heat exchangers for a wide range of marine engines from 2 up to 6 cylinders without the cost of new tooling normally associated with new designs.


Our current range of Manifold Heat Exchangers;


 Engine Model Cylinders Cooling Type Thermex Part No.
Kubota Z482 2 Heat Exchanger 890947
Kubota Z482 2 Keel Cooled 890957
Kubota  BZ602 2 Heat exchanger 893941
Kubota D722 3 Heat Exchanger 890945
Kubota D722 3 Keel Cooled 890955
Kubota D902 3 Heat Exchanger 893940
Kubota D1005 3 Heat Exchanger 890943
Kubota D1005 3 Keel Cooled 890953
Kubota V1505 4 Heat Exchanger 890941
Kubota V1505 4 Keel Cooled 890951
Kubota V1903 / V2203 4 Heat Exchanger 890958NR
Kubota V1903 / V2203 4 Keel Cooled 890959NR
Isuzu 3LB1 3 Heat Exchanger 890987
Isuzu 3LB1 3 Keel Cooled 890971
Isuzu 3LD1 3 Heat Exchanger 890988
Isuzu 3LD1 3 Keel Cooled 890972
Isuzu 4LC1 4 Heat Exchanger 890989
Isuzu 4LC1 4 Keel Cooled 890973
Isuzu 4LE1 4 Heat Exchanger 890990
Isuzu 4LE1 4 Keel Cooled 890974


All of the Manifold Heat Exchangers above can now be bought online from our approved distributor A.S.A.P. Supplies

For larger volumes or OEM enquiries please feel free to contact us directly.


Make an enquiry;


Tel: +44 (0)1527 62210





Contact Us


+44 (0)1527 62210



Thermex Ltd

Merse Road

North Moons Moat

Redditch, Worcestershire

B98 9HL, U.K.

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