Rolf, Did you have noise narrowed down to #2 and #3 cylinder's valve train in the head? Did you replace your gasket?
-Max ________________________________ From: Rolf <r...@winmutt.com> To: Mercedes Discussion List <mercedes@okiebenz.com> Sent: Thu, March 3, 2011 2:02:18 PM Subject: Re: [MBZ] OM603 Valve Tick Diagnoses and Fix I lay good money on the head gasket. I and others have (had) the same problem. Check the video here : http://superturbodiesel.com/std/w124-300d-turbo-om603-ticking-noise-under-valve-t-2299.html The general recommendation from the FInns is to go with the 606 headgasket as a replacement, it will need some modification for the 603 (drill two holes). -Rolf On 03/03/2011 01:42 PM, Max Dillon wrote: > Dieselvolk, > > My '87 300TD has a valve tick that I want to fix. I'd appreciate thoughts and > input on what the problem is and how to fix it. > > History: I've only used Mobil 1 oil since purchasing the car about 50k miles > ago, when it had about 284k miles It now has 334k miles. About 3 years ago > (~20k miles ago) the tick developed after a 450 mile travel day, during which > the car ran very hot but did not overheat, due to a long stop-n-go traffic jam > on the freeway. Car had increased oil consumption during the trip (used > about >1 > qt in 500 miles, normally only uses 1 qt per 2000 miles), and the noise began > the next morning upon first start. > > After fussing over the noise for a few days but not really doing anything other > than add oil and determine that the noise originates from either the #2 or #3 > cylinder valves in the head, the noise largely went away on its own. > > After that episode, the noise would occasionally come back if the car was > exposed to cold weather (i.e. around freezing or lower), but once it was driven > the noise would reduce to the point that I really had to listen hard, generally > with the hood up, to see if it was still ticking. > > I tried testing the lifters (hydraulic valve clearance compensating elements) >in > accordance with the book, and they passed, but that was at a time when the > lifter tick noise was reduced. > > The current engine oil is now 10k miles old. It is Mobil 1 5w-40, and the 5k > oil analysis showed only 0.4% soot. I sent in the 10k sample last week, should > have results shortly. All previous oil samples were negative for glycol > (coolant) and wear metals are pretty normal in my opinion. > > This past January the noise came back with a vengeance after I drove the car to > Baltimore, and then car sat in a freezing parking lot for a couple of weeks. I > drove the car home, and since then I've only driven it a few times, but the > noise is almost constant. Now it will sometimes be reduced when the engine is > cold, but once the car warms up it comes right back. > > So here's my plan. > > 1) Warm up the engine and then pull the valve cover and test the lifters again > using the book method. If any fail the test, replace them. Inspect the > camshaft lobes for wear. > > 2) Change the oil. > > 3) Replace the lifters for #2 and #3 on principle (they're noisy). > > 4) Pull the head and replace the head gasket, assuming a failure at the oil > passage between #1 cylinder and timing chain case, allowing oil to flow into >the > timing chain area and back the sump, which reduces the oil pressure to the head > and causes the noise. I like this option least, because I fear finding cracks > in the (number 14) head and I'm worried that if I put a cracked head back on, > the cracks will worsen and I'll start burning coolant or mixing oil and > coolant. Right now the upper radiator hose has normal pressure after resting > overnight, and the engine oil analysis looks good, so I don't think I have > problems with cracks in the head right now. > > Thanks for reading through all this! > > Very respectfully, > /s/ > Max Dillon > '87 300TD 334k miles > '95 E300 280k miles > '73 Balboa 20 > Charleston SC > _______________________________________ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
