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Symptoms:
Cause: Constant oscillation of the main regulator valve and/or the boost regulator valve in their bores creates wear, which can result in oil pressure loss or cross leaks and valve malfunction.
Correction: Sonnax now offers an oversized valve kit for both the main regulator valve and boost regulator valve to restore proper clearance to the bore and prevent oil loss.
In 096, 097 and 098 VW/Audi units, wear at the inboard end of the boost regulator bore can reduce the ability of EPC/TV pressure to stroke this valve open. Full boost exiting this valve combines forces with the main regulator spring, increasing line pressure. The Sonnax oversized boost regulator valve kit allows the bore to be refurbished and restore proper pressure control.
Content:
SONNAX Installation Instructions