In Reply to: V8 sulphur problem symptoms/wake-up call posted by keith on March 22, 1999 at 09:28:18:
: I have a 1994 530ia, with 67,000 miles on it and the original Nikasil block. My 6 year/100,000 mile extended engine warranty will expire in 8/99, since my date in service is listed as 8/93. For those of you who have had the short block replacement, I was wondering what the symptoms of your "bad" engine were before the replacement. I know that the most commmon one is rough idling. Mine idles somewhat rough only when it is cold. However, my oil seems to get dirty fairly quickly (it is filthy looking 1500 miles after an oil/filter change), compared with my other vehicles (Volvo 240 and Toyota truck). To me, this indicates possible excessive compression ring blow-by, although the engine does not burn any oil. As I am planning to take my car in this summer for the free leakdown test (before the warranty runs out), any comments on symptoms would be appreciated. This should also serve as a wakeup call to all 1993 and 1994 V8 owners - check with your dealer as to your car's date-in-service, as the extended warranty is good for only 6 years or 100,000 miles, whichever comes first!!
For a full discription of the early V8 problem go to Brett Andersons Web site. Brett is an independent mechanic servicing BMW's.
V8 page is:
Basically the test for a bad engine is done by a cylinder leak down test, with the piston at TDC for each cylinder. The dealer can perform this test if you can convince them that the engine idles bad enough. I would go in and raise hell about the bad idle until they did the test.
Do not let the testing dealer know you understand about the bad V8 blocks and just want yours tested.
Do not let the testing dealer know you understand that a bad idle could mean the block is bad and the leak down test is the definitive teat!!!
Go in with just your complaint of bad Idle!!
Ask for what ever diagnostic results they run.
I would also make the complaint a couple of times, before the warrantee is up. The wisdom here is that if the engine is bad they will replace the block. If the engine is not bad enough to replace now then you have established a complaint record before the end of warrantee and should the engine fail with in a year or so you have a link to your earlier complaints of bad idle to have the block replaced for free after your warrantee has expired.