Description

Sisudiesel 645 DSBIE Parts Catalog

You’re rebuilding a Sisudiesel 645 DSBIE Parts Catalog and you need the right part numbers – not aftermarket guesswork. This factory catalog, 35 pages straight from Sisu Diesel Oy, gives you exploded part diagrams, gasket set codes, and repair kit references. I’ve seen too many guys order the wrong cylinder liner because they used a third-party list. That stops here.

Page 2 lays out the symbol system for this catalog. S1 and S2 mark parts included in gasket sets I and II. K means the part belongs to a repair kit listed at the end of the page. Numbers with a slash and asterisk point you to another page. Engine number references tell you from which serial number a change applies. If you skip reading that page, you’ll misidentify parts. Don’t be that guy.

Cylinder Block Breakdown – Part Numbers You Need

On page 3, the cylinder block group is shown with every screw, bushing, and liner called out. Item 1 is the cylinder block itself: part number 8368 67046. Item 2 is the bushing 8368 66069. The cylinder liners (item 14) are 8368 67048 – six per engine, each with its own O‑ring. You’ll also find the guide sleeves (item 4) and bearing covers (items 3 and 5). Every single component has a reference number and a quantity. That’s the difference between ordering once and ordering twice.

S1 and S2 Gasket Sets – Which One Fits Your 645 DSBIE?

Gasket set codes are stamped right on the page. S2 includes O‑rings for the cylinder liners (item 15: 8368 55446, item 16: 8368 55447). S1 covers the upper gasket set. Your engine serial number – the one starting with N3298 on the cover page – determines which set your build requires. The catalog lists the part numbers for both sets. Cross‑reference your engine number and order the correct kit. No mixing sets unless the manual says so.

35 Pages of Factory Specs – Why Size Matters

Thirty‑five pages might not sound like much, but every page covers a specific subsystem: cylinder block, crankshaft, timing gears, lubrication, fuel system. Each component has its own exploded view with part numbers and quantities. Need the valve for the cylinder block? Item 18 on page 3 – 8363 38601. The gear for the cam drive? Item 19’s gear is 8368 59165. The catalog is dense. Nothing is wasted. You get the exact OEM part numbers Sisu Diesel used when the engine left the factory.

Check the Engine Number Before Ordering Parts

Engine number N3298 marks the start of production for this catalog’s engine range. The front page clearly states “From eng. nr N3298.” If your 645 DSBIE is older than that, you need a different edition. Always verify your engine number before you pick a part. The catalog uses a > symbol with a page reference to tell you when a part changes after a certain engine number. Ignore that at your own cost.

Repair Kit ‘K’ Codes – How to Use the End-of-Page References

When you see a K next to a part number, it means that part is included in a repair kit listed at the bottom of that page. For example, on the cylinder block page, certain bushings and gears are part of a kit. The kit part numbers are grouped at the end of the chapter. If you’re overhauling the entire lower end, ordering the kit saves you from buying each gasket and seal separately. But you still need the individual part numbers for the hard parts that aren’t in the kit.

Related catalogs you might need: similar platforms include the SisuDiesel 634 DSBIE Spare Parts Catalogue for the 634 series, the SisuDiesel 620 DSRE Spare Parts Catalogue for the 620 DSRE, and the SisuDiesel 420 DSRE Spare Parts Catalogue for the 420 DSRE. These all follow the same part numbering logic.

For background on diesel engine operation, this Wikipedia article on diesel engines gives a solid overview. And this Wikipedia article on diesel engines explains the combustion cycle if you’re new to the field.

Does this catalog include torque specifications?

No. This is a parts catalog, not a service manual. Use the factory service manual for torque values. Stay safe.

How do I tell if my engine uses S1 or S2 gasket set?

Check the engine number on your Sisudiesel 645 DSBIE nameplate. The catalog’s page 2 lists the engine number ranges that correspond to each gasket set. For engines built after serial number N3298, the S2 set is typically used for the cylinder liner O‑rings. If your engine is outside the listed range, call Sisu Diesel with your serial number. Do not guess – the wrong gasket set can cause oil or coolant leaks that take hours to fix. The part numbers for both sets are listed on page 3. Match your engine number and order the set that the catalog specifies. Simple, but only if you read the small print.

If you’re serious about getting the right parts for your 645 DSBIE, the factory source is the only way to avoid wasted money and downtime. Access the Factory Manual now.