603 diesels

603 diesels DEFAULT


Business Name:


Business Type:

Domestic Limited Liability Company

Date of Formation:

Apr 05 2016


Not In Good Standing

Management Style:

Member Managed

Date of Formation in Jurisdiction:


Principal Office Address:

184 Jefferson Drive, Hillsboro, NH, 03244, USA

Mailing Address:

184 Jefferson Drive, Hillsboro, NH, 03244, USA

Citizenship / State of Formation:

Domestic/New Hampshire

Last Annual Report Year:


Registered Agent Name:

Daigneault, Brandon

Registered Office Address:

184 JEFFERSON DRIVE, Hillsborough, NH, 03244, USA

Registered Mailing Address:

184 JEFFERSON DRIVE, Hillsborough, NH, 03244, USA

Principal Purpose



NAICS Subcode

Principals Information



Business Address

Companies Name Start With 603

Sours: https://www.nhcompanyregistry.com/companies/603-diesels-llc/

Mercedes-Benz OM603 engine

Motor vehicle engine

The OM603 engine was a straight-6Diesel automobile engine from Mercedes-Benz used from 1984 through 1999. The 603 saw limited use in the W124, W126 and W140 model vehicles.

It is closely related to the 4 cylinderOM601 and the 5 cylinderOM602 engine families of the same era.

The 603.96 engine has a capacity of 2,996 cc (182.8 cu in) and was a development of the reliable 5 cylinder OM617 engine. It produced 143 hp at 4600 rpm (euro market without catalytic converter produced 148hp) and 195 ft.lb at 2400 rpm with a compression ratio of 22.0:1. Versions 603.96x and 603.97x are turbocharged. Only turbocharged models of the 603 series were available to the U.S. market. The single camshaft and injection pump are driven by duplex chain from the crankshaft. A separate single row chain drives the oil pump. The camshaft operated the valves via hydraulic bucket tappets; valve clearance adjustment is automatic.

Fuel is injected into a pre-combustion chamber. A Bosch M in-line injection pump is used, with a mechanical governor and vacuum-operated stop control. The pump is lubricated by a connection to the engine oil circulation and the fuel lift pump is mounted on the side of the injection pump. Preheating is by glow plugs with automatic control of preheating time.

The 603 engine had a diesel particulate filter, or trap oxidizer, in the US market. As these were mounted at the cylinder head (modern traps are mounted further away), heat from these trap oxidizers caused failure of the aluminum cylinder heads on the first generation of 603-engined vehicles; debris from the traps could also damage the turbocharger. This first version was sold in the US from 1986 to 1987. Daimler-Benz removed these traps for free, and if the turbocharger had been determined to be damaged it was also replaced. Even without the heat from the trap oxidizers, the original #14 mold cylinder heads were weak and if overheated could crack. In general, the later model #18 or #22 mold cylinder heads are considered to be the definitive cure for cracked heads.[citation needed]

In 1990 the 350SD/SDL debuted, using a larger-displacement 3496cc OM603.97 engine that had more torque and a lower top RPM. The engine lived on in the W140 chassis after the W126 production ended, as the 300SD or S350, with a larger yet turbocharger and thus more power and torque. By the time of the 3.5L engine, the cylinder head issues of early 3.0L engine (US 1986-1987) had been corrected. However, in the 3.5L there exists a different situation that appeared on some engines; eventual head gasket erosion, and thus passage of oil into the #1 cylinder. As the 3.0L engine uses the same head oil passage design, yet does not appear to exhibit the problem - it might be that the larger bore in the 3.5 engine, the higher pressures, and resulting smaller head gasket surface area could conspire to cause a gasket erosion issue.

Versions of OM603 Mercedes 6-cylinder diesel engine[edit]

Model indicationYearEngine no OM603...Power in kW (hp)Torque in Nm
OM 603.xxx (6-cylinder diesel)
W124 300 D 04/1985 -> 06/1993 .912 81 (109) @ 4600 rpm (<'89) or 84 (113) @ 4600 rpm (>'89) 185 @ 2800 rpm (<'89) or 191 @ 2800 - 3050 rpm
W124 300D Turbo 01/1987 -> 03/1996 .960 & .963 (4Matic) 106 (143) @ 4600 rpm (<'88) or 108 (147) @ 4600 rpm (>'88) 267 @ 2400 rpm (<'88) or 273 @ 2400 rpm (>'88)
W124 300TD Turbo 1987 .960 106 (143) @ 4600 rpm (<'88) or 108 (147) @ 4600 rpm (>'88) 267 @ 2400 rpm (<'88) or 273 @ 2400 rpm (>'88)
W126 300SDL 02/1985 -> 09/1987 .961 110 (148) @ 4600 rpm 273 @ 2400 rpm
W126 350SD/SDL 06/1990 -> 08/1991 .97x 100 (136) @ 4000 rpm 310 @ 2000 rpm
W140 300SD / S350 09/1991 -> 08/1996 .97x 111 (150) @ 4000 rpm 310 @ 2000 rpm
Sours: https://en.wikipedia.org/wiki/Mercedes-Benz_OM603_engine
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This Week At New England Dragway!

Wednesday September 19th:
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to benefit Toys for Tots!
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FREE Admission if you're in costume!
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Sours: https://www.patriotledger.com/blogs/20180917/this-week-at-new-england-dragway?template=ampart
Turbo Diesel Trucks Drag Racing 603 Diesels April 12 2018 New England Dragway Epping

201 124 and Late 126 Turbo Hydraulic Cam Follower - Lifter for 601 602 603 Diesels

1984 to 1989 190D, 1986 to 1993 300D 300TD 300SDL 350SD 350SDL 300D 2.5

Brand new self adjusting hydraulic valve lifter for use on 601 602 and 603 4, 5 and 6 cylinder Diesel Engines.

201 124 and Late 126 Turbo Hydraulic Cam Follower - Lifter for 601 602 603 Diesels


Product Details

Two required per cylinder. If your 1986 or new diesel (as well as 1984 to 1986 190D) has started to develop a ticking noise at idle it may be a sign one or more of your lifters are failing. There is no way to adjust this out. You must find the failed lifter and replace it.  On high mileage engines I would recommend replacing them all so you don't have to do it again! If you need more than one just change the quantity in your shopping cart. No instructions included at this time.

Sours: https://mercedessource.com/store/201-124-and-late-126-turbo-hydraulic-cam-follower-lifter-601-602-603-diesels

Diesels 603


603 Diesels: Season closer!


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