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Technical Articles


Holden F18D4 VVT Rattle

holden f18d4 vvt rattle

All Head Services have had numerous occurences where a customer has called after fitting a Z18XER or F18D4 cylinder head with the complaint of a rattle in the VVT . Read more ...

Dry Start Camshaft Seizure

subaru ej25 camshaft seizure

The bearing surface of the camshaft has been damaged fron lack of lubrication on startup. Read more ...

Nissan YD25 EGR Cooler Failures

nissan yd25 egr cooler

The EGR cooler is made up of many smaller pipes which are surounded by coolant to reduce the tempertue of the exhaust gases. They can fail internally. Read more ...

Installation Advice From BG Automotive

camshaft installation advice

The "Breaking In" process is very important after the installation of new components because they require time to work harden the contact surfaces. Read more ...

Sealant Overload - Take 2

ford ranger mazda bt50

Excessive sealant seizes the camshaft on a Ford Ranger / BT-50. Read more ...

Oil Leak

ford ranger mazda bt50

Ford Ranger / Mazda BT50 oil leak at the rear of the cylinder head. Read more ...



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