Mica95 Posted August 5, 2020 Share Posted August 5, 2020 (edited) Good morning team, 1995 wrx I recently had a tapping noise from the driver's side head, popped the rocker cover off and started to check the valve clearence. Inlet cam is all correct and all with in tollerence ( under shim style bucket ) The exhaust cam.... The bucket furthest from the pulley is tight about .06mm so say just out side of tolerance however the 3 nearest the pulley you can push down with your finger so the biggest feeler gauge fits in ! ... Surely this is wrong and almost feels as if there is no pressure ? Does anyone know how these work ... ? Would it be a case of replace buckets or do we think there could be an underlying issue causing this ? Edited August 5, 2020 by Mica95 Grammar Quote Link to comment Share on other sites More sharing options...
savage bulldogs Posted August 6, 2020 Share Posted August 6, 2020 You shouldn't be able to push the buckets down very far by hand , so it sounds like they need replacing.However , It could be something stuck in the valve seat , causing the valve not to return/seal properly. I'd do a compression test to rule that out first and if alls ok ,then measure the clearance ,remove buckets/shims ,measure their thickness and buy new buckets shims to match the clearance needed . There's two types of buckets on scoobies , single piece or separate removable shims . The single piece ones can still be bought in different thicknesses from subaru . Unfortunately, subaru have discontinued the type with the removable shims but they can be sourced from the likes of Asperformance in the thickness required Quote Link to comment Share on other sites More sharing options...
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