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RB25DET parts - block, crank, rods, forged pistons +++

GeeDog
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GeeDog Experienced

GeeDog

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I have an RB25DET block, crankshaft, rods, forged pistons, flywheel and other bits for sale.

This is the original block from our series 2 R33 GTST. Some years ago we had low compression in a cylinder, and removed and stripped the engine – we had a broken ring land.

The block was taken to our machinist, who cleaned it, bored it .5mm (to 86.5mm), honed the bores, enlarged the oil return holes, decked it, and fitted oil restrictor & block-off as recommended by everyone. New welsh plugs were also fitted throughout.

The crankshaft was sent to a crankshaft specialist, who crack tested it (no drugs), drilled out the gallery plugs to clean it, grub-screwed the plugs, and linished it. The girdle and bolts are included.

The rods were fine, so nothing was done to them.

Because of the broken piston, we bought a set of CP 86.5mm forged pistons.

The engine was re-assembled with new bearings, gaskets, seals etc.

Not long after this the stock turbo shredded the impellor. We had the turbo rebuilt & hi-flowed by Hypergear, refitted it, and had it re-tuned.

Turns out something then went through the engine – we think bits of the old impellor – and scratched the bores. At this point we decided to go RB25/30, so sourced a bottom end and went through the whole process again.

The bits for sale are what is left over.

The block is in good condition, except for the scratched bores. I have no way to measure if they just need to be honed, or re-bored, but my gut feeling is they need a rebore. Block is a 75T casting.

The crankshaft is perfect, and as mentioned above has been grub-screwed.

Rods appear to be excellent, but again I have no way to be 100%. Almost new main & big-end bearings are included, and are in their original locations if the buyer wants to re-use them. This motor didn’t run for long at all.

Pistons will need to be assessed, but new rings will be needed at least. Pistons have some damage evident.

Also included, along with the block, crankshaft, girdle, girdle bolts, forged pistons, rods, main & big-end bearings, are the following items:

Harmonic balancer – original, with some cracks showing in the rubber

Flywheel including flywheel & clutch bolts

Water pump – as new RB25 water pump (we needed a different one on the RB30, one hole is in the wrong place)

Oil pickup

Rear main seal holder

Timing belt idler – again this was new, and wasn’t needed on the RB30 (uses 2 x tensioners instead)

Wastegate actuator – pretty sure this is an RB20 10psi actuator, but it was some time ago and I may be wrong. Actuator is stamped ASN79

Coilpack cover

I’d prefer to sell everything complete – looking for $600, which I think is a bargain.

I’d also (much) prefer local pickup – parts are located in Adelaide’s north-eastern area.

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