Hello guys,
I have a golf mk2 with a 1.8t 20v dsg emublack setup, id1000 injectors, g25-660 turbo, 3” downpipe, 2.5” BMW x4 resonator.
While the car was at the tuning shop on the dyno
the engine seized and broke the cranck timing tooth pulley and valves were damaged, when took out the engine head the pistons and cylinders were toasted, and the turbo damaged.
Can somebody explain what just happened, the car was on the dyno when this happened
The tuning shop checked the timing and compression of the engine before one day from this happened, the engine been for two years (~5000 km) only working fine till decided to change a turbo and a wiring loom.
Thanks in advance
If u sas u changed the turbo…i woukd say the turbo was bad and threw shit in the engine and so it died. U have impacts on the piston…most likely something got into the cylinders.
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Hi,
The turbo worked fine, this happened after an half an hour on the dyno, and it was spinning fine but no torque and engine revs were too slow, the spark plugs were toasted also, I think they damaged the turbo. But the basic issue I think was inside out, and the turbo got damaged on the way.
Ah u are right…the picture shows the turbine wheel…i thought it was the compressor wheel.
This looks like the extra heat produced by the new turbo (assuming its bigger) has caused the ring gap to completely close up.
Is this a stock bottom end?
Were the rings gapped for more heat?
Can you share the boost pressure and afr values ?
Yes it’s a stock engine and the ring gap was measured, the turbo isn’t bigger it’s smaller, I had a bigger one but too lagy it broke down in the end and was replaced with a g25-660
Yes, I have to get the values from the tuner and I will share them
Honestly it looks like your turbo might have ingested something somehow, something solid and it
Whoever was tuning it, leaned on the engine too hard and destroyed your bottom end. This is NOT a turbo problem or a bottom end problem. This is a tuner error. Those black streaks are detonation marks. Smaller turbo would have “come online” earlier and thus cylinder pressures would be higher than they were with the old turbo. Too much ignition timing and/or incorrect fuel octane rating and BAM you have what you have.
What is the compression ratio of that engine? how much boost? what was the timing? What does the compressor housing look like?
Real bummer this happened to you but this is 100% a tuner error.
