Author Topic: High compression pistons Vw golf ed30  (Read 358 times)

Offline Zish5595

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High compression pistons Vw golf ed30
« on: August 30, 2020, 09:52:46 AM »
Hi, I have a Vw golf gti edition 30 which I have replaced the head of. Aswell as the head pistons have also been replaced. Since the pistons have changed on idle the car  starts hunting when revs drop below 1k my mechanic has advised me that my pistons Compression is 15.5 bar per each piston. How can this be fixed?

Offline Pudding

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Re: High compression pistons Vw golf ed30
« Reply #1 on: September 05, 2020, 01:40:26 PM »
Do mean that was the result of a compression test?  15 bar is about right for a new engine. I doubt it's the cause of a hunting idle.   Since the engine has been completely dismantled, it's time to recheck everything for timing and vacuum leaks.


2007 ED30 | Ohlins Coilovers | Revo Map | Plus some other stuff | Is all a GTI needs :-)

Offline Zish5595

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Re: High compression pistons Vw golf ed30
« Reply #2 on: September 13, 2020, 01:37:08 PM »
My mechanic has told me that it’s running really high for it to be running 15 bar, he’s saying it’s equivalent to 230 psi which is really high but has stated it should be around 12 bar running 180 psi does this sound right? Also with the compression ratio being  as high a 15 is the car still okay to drive?
« Last Edit: September 13, 2020, 01:39:31 PM by Zish5595 »