All Things Mk5 > Members Rides
I bought back my old mk5
pudding:
VAG Technic and REPerformance are worth a shout as well. The latter built a 1000hp engine for EcoTune's 8 second RS3 drag car :happy2: I think that engine has had over 600 dyno pulls and done countless 1/4 miles, and it's still in one piece :surprised:
The trouble with modern VAG engines is once they come apart, unless everything is spotless and within tolerance, they're pretty much junk. Hence why I would only get a crate motor from VW if I was to do a replacement, rather than repairing the original one. The only time I would entertain a rebuild is if it was a 'built' (or fully forged as the kids say) motor from the aforementioned specialists, as all the pistons, rods etc are uprated anyway.
christii:
Thanks guys for the advice. I think a new engine is too much of an investment. A new engine is a good bit more than I paid for the car!
How much do think an engine rebuild from one of the top guys would cost? And worst case scenario, imagine my engine is in bad shape.
pudding:
Holy metal crumbs batman, I've just seen the carnage pics. They look suspiciously like the thrust bearing remains we were talking about to me, which might explain the gear engagement issues, aka, crank walk.
The thrust bearing on these engines is a terrible design, basically only half a bearing compared to the usual standard. I pity the later EA113 engines with the clutch down to start the engine nonsense. No oil pressure on the bearing whilst cranking.....what the frick were VW thinking :stupid:
As for a rebuild/new engine. I doubt the cylinders or top end have suffered, you probably just need a new thrust bearing, which is like 40 quid, but the labour to replace it is 4 figures. Engine out job.
Golf GTIs were never meant to do track work. Too much oil surge in the corners and not enough preventative measures to safeguard the engine against it. Later Golfs, MK7 and on, are even worse for it. Clouds of blue smoke on track days due to oil surge having nowhere to go but up through the PCV or blowing out the rear crank seal.
I admire you chaps who track GTIs but honestly, I would stick the GTI to road duties only and buy a second car for track work, something designed for it like a Caterham.
Mekaniko:
--- Quote from: Pudding on June 24, 2022, 11:40:23 pm ---Holy metal crumbs batman, I've just seen the carnage pics. They look suspiciously like the thrust bearing remains we were talking about to me, which might explain the gear engagement issues, aka, crank walk.
The thrust bearing on these engines is a terrible design, basically only half a bearing compared to the usual standard. I pity the later EA113 engines with the clutch down to start the engine nonsense. No oil pressure on the bearing whilst cranking.....what the frick were VW thinking :stupid:
As for a rebuild/new engine. I doubt the cylinders or top end have suffered, you probably just need a new thrust bearing, which is like 40 quid, but the labour to replace it is 4 figures. Engine out job.
Golf GTIs were never meant to do track work. Too much oil surge in the corners and not enough preventative measures to safeguard the engine against it. Later Golfs, MK7 and on, are even worse for it. Clouds of blue smoke on track days due to oil surge having nowhere to go but up through the PCV or blowing out the rear crank seal.
I admire you chaps who track GTIs but honestly, I would stick the GTI to road duties only and buy a second car for track work, something designed for it like a Caterham.
--- End quote ---
That’s experiencie taking.
christii:
Bit of an update on the Golf.
I took it over to Decimal Tenths in Newcastle upon Tyne to have the engine properly diagnosed and hopefully rebuilt. I've been watching Nicks Youtube channel for a while and I was confident it would be worth getting the ferry over for.
Hopped on the 7.30am ferry and was in Newcastle by 1pm. Nick gave me a lift into the city centre, I grabbed some food, had a walkabout then got the Metro to the airport. It was all very easy.
Unfortunately by Thursday the diagnosis was complete and I got the bad news. The first sentence in the message didn't full me with much confidence;
"Every now and then a car comes in and when we look inside, we are shocked that it was even running." :tired_face::joy:
So basically the crank walk is as bad as it gets. There's no thrust washers left at all, the crank has been grinding against the main cap. The flywheel has been grinding against the sump. The crank is moving side to side a good 10mm! The balance shaft has seized solid and sprocket that drives it has completely sheared off. The engine is officially scrap.
I managed to find a used engine for a good price from a breakers yard in Nottingham. It's from a Golf that's been written off from a side impact, and it's only got 85k miles on it. Fingers crossed its a good one. (Can't be any worse than the ship anchor currently in it)
So the plan now is for Decimal Tenths to totally go through this new engine. Carbon clean it, new cam chain, balance shaft delete and new upgraded thrust washers so this doesn't happen again. Its very likely that my performance clutch is what's destroyed the thrust washers, so upgraded ones from Pro-Race Engineering are a must!
Then they'll have to swap all my K04 kit over, and all the new shiny bits I've added to my old engine along the way. It will then need to go onto their Dyno for another remap. Well that's the plan so far. Fingers crossed there's no more nasty surprises.
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