Posts

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.

 

Toyota 1KD-FTV Piston Failure

Toyota Hilux 1KD-FTV EURO 4 Spec

 

Models – KUN26, KDJ120, KDJ125, KDJ150, KDJ155

Fault – Crack in piston, can lead to localised rupture

Symptoms – Sudden loss of power, engine runs rough (on 3 cylinders), loud knock at idle, black smoke from exhaust, excessive crankcase pressures

When disassembling the engine, there are cracks detected in one or more pistons (various sizes, up to a local ruptures). The look is radically different from the cases of usual piston melting, and only small local flowing can be observed in the areas of ruptures.

Summary Piston Cut out 1kd

The 1KD engine has been sold in Australia for over 10 years, and has had a bumpy ride in terms of engine reliability.  The first production of the engine is not affected by this issue as it featured a piston design which included a metal fibrous structure fused into the piston crown (as pictured).  This structure added extra strength to the piston thus avoiding failure.

The engine underwent Euro 4 emissions modification which coincided with an overall modernization – reduced compression ratio, increased torque and power. The shape of the combustion chamber in the piston was changed, and any mention about the reinforced zone disappeared.  Considering the circumstances of occurrence, the cause of the problem should be called “inadequate strength margin on pistons”, essentially it comes down to design and construction mistakes on the Euro 4 version of the engine.

1KD-FTV Pistonkd-crack

Three years later the obviously substandard pistons were replaced by a new revision, however whilst this was an improvement, failures were still occurring, but at a lesser rate than previous.  Contributing factors are also associated with the fuel system, but are secondary.

The failures are most commonly occurring around the 100,000 – 150,000 km.  The problem is recognised by Toyota in several service bulletins released between 2011 and 2014.

See – technical-service-bulletin-toyota-1kd

Euro 5 revisions brought yet another design change, and whilst it’s still early days, it looks like the problem may have been resolved.  Time will tell.

Owners and potential buyers of the “EURO 4” affected models of the Hilux, Prado and Hi-ace should be wary.  The advice is simple, avoid chip tuning, avoid long driving at high speeds (especially under load) and service the fuel injectors every 100k.  This will reduce the likelihood of failure, but the only to overcome the inherent design fault is to change the pistons.  Speak to Southside Cylinder Heads today about repair and failure prevention options.  Engines & cylinder heads since 1977.

 

 

Congratulations to our winners!

winners_banner

Congratulations to Mike of Strathpine Auto Care and Matt at Midas Car Care Beenleigh, both will enjoy a two night getaway at Ramada Golden Beach on the Sunshine Coast for two people, with ocean views and a bottle of wine on arrival.  We hope you enjoy your stay 🙂

Southside Cylinder Heads would like to thank Mike, Matt and all our loyal customers who missed out on the major prizes for their ongoing support.  Watch this space for more helpful tech articles and promotions.

 

New Ultrasonic Cleaning Technology

Over the Christmas break we were spoilt here at Southside Cylinder Heads as we too received Christmas presents! We were lucky enough to get a BRAND NEW ULTRASONIC CLEANING MACHINE!

This machine has enough power to clean even the most stubborn Carbon build ups on Diesel and Petrol Cylinder heads/Blocks/Rocker gears and Timing cases.  Especially handy for late model turbo diesel inlet manifolds, which tend to become heavily carboned up and nearly totally blocked  resulting in loss in power and increased fuel consumption.  Dont forget we have a pick and delivery service available 🙂

file-page1

Nissan YD25 EGR Cooler Issues

Problem:

EGR Cooler corroded or split and leaking Coolant

Vehicles Effected:

Nissan Navara D22 & D40 with YD25DDTI 2.5 Turbo Diesel Engine

Nissan Pathfinder R51 with YD25DDTI 2.5 Turbo Diesel Engine

EGR Cooler

EGR Cooler setup Nissan YD25

We are seeing more & more problems with the EGR coolers in the YD25 Nissan engine.  The coolers tend to corrode or split resulting in loss of coolant and due to the high temperature of the exhaust/EGR system the coolant loss often goes undetected as the coolant evaporates and doesn’t leave a puddle on the ground.  If the problem goes unchecked the cooling system will run dry and the engine may overheat and require major repairs.

To fix the issue some people elect to bypass the EGR system completely using blanking plates on both the exhaust and inlet manifold & disconnecting the coolant flow to the EGR cooler.  From all reports this has been an effective fix but Southside Cyl Heads doesn’t recommend this because removing the EGR will alter the vehicle’s emissions levels & render the vehicle unroadworthy

EGR Cooler Faults

Faults in the EGR cooler YD25

We recommend simply checking your coolant levels regularly and if you notice a drop in the level, get the cooling system checked and check for stains around the EGR pipe ancooler area.

Catching the problem early and rectifying the issue could save you thousands in cylinder head repairs in the event of the engine overheating.  If you suspect your EGR cooler could be leaking, give us a call and we check over the system and put your mind at ease.

 

fast service and delivery from southside cylinder heads

Fast Turn Around, Convenient Delivery

fast service and delivery from southside cylinder headsWe offer FAST turn around of your cylinder heads. We keep a large stock of exchange heads making sure you receive the cylinder in the shortest possible time. SSCH offer a pick & delivery service in most Brisbane suburbs & a fast, reliable courier service to all areas of south east Queensland, the Gold Coast & beyond.