.: BMW E36/E39/E38

BMW M50tu & M52 Engines

A common problem, these units suffer with similar issues of the standard o-ring & seal material deteriorating that affects the M3's. The standard seal & support o-ring are made from materials that do not react well in the harsh engine environment, particularly in cars with dubious service history where engine oil changes have been extended allowing the oil to become more caustic & contaminated.

 

These conditions result in the vanos piston seal losing its' sealing capabilities which leads to the incorrect, inaccurate or even a total failure of the vanos operation.

General lack of torque & / or power, particularly below ~ 2800rpm
Hesitation, sometimes coupled with 'surging', again, usually below ~ 2800rpm
Unstable or erratic idle speed
'Jumpy' idle when cold, sometimes coupled with frequent stalling.

 

The advanced fluoroelastomer, Viton® has establish new standards for high performance seals. We use a specially manufactured Viton seal in conjunction with our custom-made composite coated seal to overcome the limitations & deficiencies of the original system. These seals are made only for us by our supplier with whom we have developed & tested these kits.

Our seals are specifically manufactured for us by our manufacturer with whom we developed this kit - they do not supply to anyone else!

Each kit includes the correct number of new Viton™ support o-rings & our custom-manufactured composite piston seals. (1 each for the M50 kit & M52 Single kit, & 2 each for the M52 Dual kit).

Dont forget to add new bearings (see bottom of page) for the complete overhaul !