Donnelly Engineering

25/08/2026

Spray welding seal positions on Muir gear ⚙️ Marine Solutions Australia

15/08/2026

🚤 Donnelly Engineering — Your One-Stop Shop for Everything Automotive, General & Marine!

Did you know we manufacture prop shafts in-house? 🔧

This one came to us with a cracked shaft, so we manufactured a brand-new 2205 stainless steel prop shaft, custom-made to suit the existing coupling and propeller.

If you’re experiencing bad vibrations or need:
🔹 Cutlass bearings
🔹 Shaft seals
🔹 Prop shaft repairs or manufacturing
🔹 General shaft work

Give the team at Donnelly Engineering a call today! 📞 5531 4499

Quality workmanship, manufactured in-house. 🇦🇺

26/06/2026

Very well said PowerHouse Engines

23/06/2026

📢 we are hiring 📢

🛠️ Are you a first or second or a trade qualified fitter & turner? There’s an opportunity to join our team!!

What we are looking for:
✅ team player with a positive work attitude and attention to detail
✅ passionate about your career
✅ have a car licence
✅ ready to learn

If this sounds like you, let’s chat!

Please email us a resume and a short description of yourself to:
[email protected]

07/06/2026

02/06/2026

Another 1HZ-T package palleted up and heading back to the legends at .mechanical 🔥
This build includes:
• Genuine replacement 1HZ cylinder head
• Fully re-sleeved cylinder block (previously at maximum oversize)
• Torque plate honed block
• Cylinder block surfaced using a CBN cutter
• Polished crankshaft
• ACL Race bearings
• Spool H-beam connecting rods
• Turbo-spec pistons
• ADS 11mm boost-compensated pump & injectors
• Genuine seals throughout
Built to handle the boost and ready for many more kilometres. 💪

10/05/2026

When a brand-new engine isn’t an option, sometimes the only choice is bringing the old girl back from the dead 😬😝⚓️
This 4-cylinder 3.0L 181ci MerCruiser came in with severe rust damage and water sitting where it definitely shouldn’t have been… after a cylinder bore failure let water flood the cylinders 💧❌

Instead of replacing the whole engine, we brought it back to life with:
🔧 Re-sleeved cylinder block
🔧 Brand new cylinder head
🔧 New gaskets, bearings & seals
🔧 Fresh piston rings
🔧 Full rebuild and clean-up

The transformation speaks for itself 👌🔥
From rusty and seized… to fresh, clean, and ready to hit the water again 🌊

Proof that sometimes a proper rebuild is all an engine needs 💪⚙️

MarineEngine WorkshopLife EngineRestoration BeforeAndAfter MechanicalRepair BoatMaintenance RebuiltNotReplaced MarineWorkshop EngineBuild OnTheTools

10/05/2026

Cummins 5.9 short block assembly 🔥
You did not in fact have to divorce your wife , become a alcoholic or shave your eyebrows for this package 😝

06/05/2026

🔥 JESSES ONE OF A KIND TD42 ENGINE BUILD 🔥
Built in-house at Donnelly Engineering — this is what happens when there are absolutely no limits.
Starting with a brand-new genuine block and engineered to perfection, this TD42 is packed with the best of everything:
💥 Billet crankshaft & billet main caps
💥 Forged rods with ARP rod bolts & head studs
💥 Mahle pistons & ACL race bearings
💥 Genuine cylinder head with HD valve springs & titanium retainers
💥 ADS boost compensated performance pump + reconditioned injectors
💥 Ross Racing balancer
💥 HPD upgraded crankcase PCV
💥 Stainless freeze plugs, genuine gaskets & seals
💥 Genuine timing cover assembly
✔️ Torque plate honed
✔️ Fully balanced rotating assembly
✔️ Built for strength, reliability, and serious power
No shortcuts. No compromises. Just elite engineering from start to finish.
💪 If you’re chasing the ultimate TD42 setup — this is it.
4x4Australia PatrolBuild HighPerformanceDiesel NoLimits