MK5 Golf GTI
All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: NorwegianMK5 on July 16, 2025, 11:01:07 am
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Hello a few questions so i’ll make it short.
Does the race oil pump for the ea113 from rtmg performance replace the whole balance shaft assembly?
Can you do the job without dropping the engine?
Do i have to time the pump, if so what do i do?
Considering the balance shaft is removed, do i need to tune the car again for this change?
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I'll try to help here, but please don't take this as gospel I'm only going by what I have seen from researching the project myself and don't have any first hand experience (hopefully others will chime in)
1: from the looks of it. This looks like the same or similar to the 1.8t oil pump conversion that a lot of companies offer. Maybe there are some differences but it's unclear from the description.
2: the pump itself can be fitted with the engine in the car, and doesn't need to be timed. But after watching some vids about the 1.8t conversion. The pulley on the crank should also be changed which might prove more difficult.
3: from what I have heard, the biggest issue with these conversions is the the stock ea123 oil pump has two check valves for the oil pressure. Whereas the 1.8t pump only has one. This can result in unstable oil pressure. (Again I don't know if that's the case with this specific kit). There is a solution to that which is to go with a 1.8t filter adapter plate that reintroduces a second check valve in the same place it goes on the older engines.
I'm weighing the same conversion when rebuilding my engine, there is also advantages in that Bar-tek in Germany sell a baffled sump to work with that.
But it seems that to do it you should do it properly and address the pressure regulation too and costs add up.
The other option is if course taking an angle grinder to the original balance shafts :laugh: