I have a 1972 BMW model 2002, not the tii,your system didn't have my year and make. Compression 140 on all 4, there is white residue on spark plugs. Mechanic says I need to replace head gasket.What's your take on these symptoms? What is the average cost of head gasket replacement? What do you think of the Product "Steel Seal" instead of replacing the gasket? Thank you very much for your knowledge and help. Respectfully, Phoenix
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2008 BMW 128i Question: Do I really need to replace head gasket?
Answer #1Bret Bodas from RepairPal Test Shop, March 19, 2010, 17:00Master
If the head gasket is leaking, the only good option is to replace it, don't use any "quick fix" products, they wont work.
A leaking head gasket can be verified by the presence of hydrocarbons in the cooling system. Here is some info: http://repairpal.com/testing-for-head-gasket-failure