Key Specs Concept:
Key specs are basically, the power and torque of the engine, the engine displacement, bore and stroke, the key bolt tightening torques (mains, con rods, and cylinder head), the compression ratio, a picture, if available, plus the dimensions and weight of the engine. It is a useful tool for anyone in the diesel engine business, and it is a recreation for anyone interested in engines. Quick Specs, or key engine specs, is a Free and open Service of Barrington Diesel Club and does not require membership.
Normally Quick Specs appear with as a dedicated webpage per engine or sometimes a webpage for a group of engines. The range of manufacturers and engine models, however, will continue to grow, and more and more specs will become available for everyone, open specs, member specs and manuals.
Quick Engine Specs have links to further specs for those who require more technical information like assembly clearances, a bigger range of bolt torques and workshop procedures. These further specs require membership or a membership window to access.
Members do not pay for the data they view or download, but there are membership fees which entitle you to enter the web club, to browse around, view and download at leisure.
Membership at Barrington Diesel Club is about being part of what we do with the intent to use that and to grow that. Membership is the key to getting more and more diesel engine specs and technical data related to diesel engines.
Standard torques - Introduction
These are the basic specifications used by manufacturers worldwide to build engines and all types of machinery, vehicles, aircraft and ships.
No engineer or mechanic should be without tables of this sort to guide them in their construction, development and repair work.
Imperial Bolts - Standard torques
Imperial High Tensile Bolts are widely found on older American, Canadian and British engines and machinery.
Largely though, newer engines and machines are gradually adopting metric ISO bolt standards.
However while practical, technical and other difficulties to complete the conversion to the metric system still remain, I think the Imperial system may still be with us for some years to come.
Metric Bolts - Standard torques
Metric system (SI).SI is the abbreviation for the metric system, the International System of Units.
Metric Bolt Usage: For many reasons standardization of various aspects of engines, like fasteners, is an ideal many are aiming at.
Ongoing standardization for materials through ISO (International Standards Organization) has resulted in many popular engine manufacturers largely changing from imperial fasteners to metric ones. The use of metric bolts and nuts by engine manufacturers like Detroit Diesel and Cummins on their newer models of engines has now become common place.
Difficulties with metric and ISO systems
From the outside, talking about anything ISO, is fraught with circles of technical jargon. e.g. try finding the correct way to write a bolt's size down on a piece of paper and you'll wind up having to buy an ISO nomenclature manual costing hundreds of Swiss marks in order to do so.
Then if you do find out before you're bankrupt, you may find that no one on earth except the real technical boffins understand what it all means anyway.
Other Standards authorities e.g. DIN, JIS, SAE, may and do make their own standards on an 'ad hoc' basis when the situation demands it or they feel the situation demands it, and those standards may or may not agree with an ISO standard for a particular thing, if ISO has a standard for that particular thing in the first place.
For ISO to succeed as a system, or any other system to succeed for that matter, it needs simplification. Begin at something like an ABC base, where terms, manuals and protocols are defined and made cheaply and easily available and usable by the majority of normal people during the progress of normal living, and activity.
Metric Bolt Terms
Normally metric fastener sizes are stated in mm (millimeters) and begin with a capital M which is followed by the fastener's nominal diameter and possibly the bolt's thread pitch, separated by an "x". If the pitch is not mentioned it defaults to the 'standard metric coarse pitch' for that size bolt or nut.
For practical purposes we write a bolt's size as follows:
M12 x 1.75 x 60
giving M for metric,
12 for the bolt's diameter in mm,
1.75 the pitch of the bolt in mm,
60 for the length of the working bolt in mm.
When you order bolts you must specify the grade, check the old bolt for the grade on the head of the bolt.
If you do not see the grade on the head of the bolt, it may be a cheap import, be careful not to use ungraded bolts, they break.
In any case, for engines I suggest you never use ungraded bolts, and then never use a lower grade than 8.8.
Metric standard torques do not consider the pitch of a bolt but do consider wether the bolt is installed dry or if it is oiled before insertion and then there is a different torque value for the same diameter bolt.
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We acknowledge the following, with thanks, for being the source of engine specs and images used by Barrington Diesel Club, - If we have omitted you, we apologize, please correct us - If you don't want your advertising material, specs or images displayed on this website - please inform us.
Advertising material, spec sheets and images from OEM material are used abundantly. We list the current manufacturer's website for reference, however some of the material is historic or no longer in production and may now not be available from them. Nevertheless at one time or other, it was in vogue, with them or their predecessors being the original source.
Material is used from OEM workshop manuals or technical bulletins which we own or have been provided with, which may or may not be out of date, or subject to revision. Please treat all such material with caution, it is listed for reference purposes only.
Other specs and data have been given by word of mouth or given from personal experience.
The sources of these are often obscure, material here used in lieu of more verifiable material being available, and it is to be used for reference purposes only.
We are not, and do not imply to be, agents or distributors for any OEM manufacturer, and advise you to check all material, specs, torques and assembly clearances obtained from this website with them before use.
Images listed on the www, being freely accessible to all who browse there:
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