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Bulletin: BMW N47 Head Gasket Differences

Models Affected: BMW 118D, 120D, 123D, 220D, 318D, 320D, 420D, 520D, X1, X3, X5

Engines: N47D20C, N47D20A-B, N47D20D

Years: 2007 – 2017

The team here at Southside Cylinder Heads have come across a variation between head gaskets on the BMW N47 Diesel Engines.  Both head gaskets look nearly identical however they are not interchangeable and using the wrong gasket will result in oil being pushed into the cooling system.

The information in regards to which gasket suits which exact model is confusing and difficult to decipher, so the best advice we can give is check very carefully against your old head gasket before fitting the new one.  Below is some pictures to help pinpoint where to look for the differences between the two.  It is the area in the middle that causes the problems, there is an oil feed that is blocked on one gasket (bottom picture) and the other gasket doesn’t have this extra piece on the edge to block the feed, and also has a different position for the water jacket holes in that area.

So far the problem has been identified in the N47D20C engine series, however we would also advise caution when dealing with the N47D20A-B and N47d20D engines.  If you need any further information call Southside Cylinder Heads on (07) 33435899.  The cylinder head and engine reconditioning experts servicing Brisbane and Australia wide.

 

Holden Cruze 1.8 Petrol Camshaft & VVT Problems

Our home grown Holden Cruze has had several different engine options since its inception in 2002.  The most popular has been the 1.8 petrol (Z18XER/F18D4), which first came out in the JG Cruze in 2009. There are two common problems we would like to discuss to help make your diagnosis and repairs easier.

Oil Flow Tubes

Firstly, a few of our customers have had problems with oil feed to the variable valve timing units after having head work or timing belt repairs carried out.  There is a small plastic tube that is being left out during re-assembly that is crucial for oil direction and flow to the variable units.  Without the tube in place, oil is not being fed to the variable unit, which triggers an engine light as well as loss of power through the rev range.  Theses tubes are located inside the camshafts at the front, right behind where your camshaft gears bolt on.  There is one for each camshaft.  Make sure these are in place before refitting the cam gears because the engine will not operate correctly without them.

Oil Coolers

Second issue is a high number of vehicles ending up with oil in the cooling system. These engines (Z18XER and F18D4) run oil coolers which are renowned for failing.  If you have oil mixing with water, check your oil cooler before racing to remove the cylinder head as this is most likely your problem.  Southside Cylinder Heads can pressure test your oil cooler for you.   The coolers are located next to the oil filter and forms part of the oil filter housing assembly.  Currently replacement coolers are only available OEM.  Southside Cylinder Heads, Brisbane’s best choice!

 

we have new camshafts available for the Holden Cruze on our online store.