These engines do not blow head gaskets; the head gaskets are more robust than the heads and cylinders. These engines crack heads, especially if the car is a '00-01' S model.
We have had ONE bad heat exchanger/ oil cooler here ever. We have had dozens and dozens of cracked cylinder heads and cracked cylinders.
Most of the time we get intermixed engines from shops that have already changed the oil cooler and they wasted a ton of time cleaning the systems only to find out that the problem wasn't solved. When we have intermix I jump straight to a cracked head as my hypothesis and I have been right in 99% of the occasions. This saved time, money and frustration by just sucking it up and taking the plunge. Taking the plunge requires confidence which is gained from lots of prior pain and suffering.
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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