No. You still could have bad glow plugs, low compression (valve adjustment or rings), bad injectors, leaking fuel lines. Your car is trying to tell you that it needs attention; that is all we know so far. The easiest thing to try first is measuring the resistance of the glow plugs. Next would be pulling the pre-glow relay fuse to see if it has cracks or crumbles in your fingers. After that, try operating the manual primer pump; if it leaks, it needs to be replaced. If it doesn't leak, keep pumping while SWMBO tries to start the car (already recommended; if that helps, then you know you have a leak in the fuel system. I'd say the valve adjustment is 3rd from last, as you say it was done recently. After that, pull the injectors and have the compression checked and have the injectors tested while they're out (don't forget to use new heat shields when you put the injectors back in).
-Max -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of andrew strasfogel Sent: Wednesday, December 15, 2010 4:56 PM To: Mercedes Discussion List Subject: Re: [MBZ] Hard starting 300TD Another question. The "good" 300TD starts without glowing when the engine is warm. The "bad" 85 300TD always needs to be glowed before starting, regardless of engine temperature. It starts quicker when it's warm, but I still need to glow it or it cranks a lot. Does this observation mean the glow plugs aren't the problem? On Wed, Dec 15, 2010 at 9:12 AM, Rich Thomas <richthomas79td...@constructivity.net> wrote: > Yeah that sounds right. I forget these things, maybe I should use a > notebook or something when doing these jobs. But those gearwrenches are > great tools. > > --R > > On 12/14/2010 10:35 AM, John Reames wrote: >> >> An 8mm gearwrench for the electrical connections, and a 10mm for the plugs >> proper. >> >> -- >> John W Reames >> jwrea...@comcast.net >> Home: +14106646986 >> Mobile: +14437915905 >> >> On Dec 14, 2010, at 10:28, Rich >> Thomas<richthomas79td...@constructivity.net> wrote: >> >>> Might want to check your glow plugs, relay, and CHECK YOUR FUSE. The 84 >>> SD was getting a bit balky, even in warm weather, I replaced a couple of >>> glow plugs and the relay (which did not appear to be relaying very well for >>> reasons unclear), and it fires right up (though I have not yet tried it >>> today after last night way down in the 20s). I CHANGED THE FUSE too, first >>> thing, but it was OK so that was not the issue. Sort of minimal stuff that >>> you should probably check as a matter of course, but makes quite the >>> difference. >>> >>> Note: changing the glow plugs really benefits from a 10mm (I think) >>> gearwrench as that is about the only thing I could fit in there easily to >>> loosen/tighten everything. The relay is easy to change, make sure you >>> disconnect the battery first. >>> >>> --R >>> >>> On 12/14/2010 10:14 AM, andrew strasfogel wrote: >>>> >>>> This is a new problem for me. The 1985 300TD recently had a valve >>>> adjustment so I wasn't too worried about it starting in the cold. >>>> Well, I should have been! Yesterday, with a temp of around 23 F., >>>> after sitting in the street for a mere 6 hours the 300TD barely >>>> started up without running down the (relatively new) battery. I had >>>> to key the glow cycle three times for an additional 10-20 seconds each >>>> time before it fired up. >>>> >>>> So how do I diagnose whether this is bad glow plugs or low >>>> compression? Or could it be something else? The car never fires up >>>> quickly in the best of circumstances, compared to the '83 turbo diesel >>>> wagon, although it has adequate power and acceleration. Fuel is >>>> clean, too (I recently changed the tank strainer and other filters). >>>> >>>> As always, TIA. >>>> >>>> Andrew >>>> 1983 300TD starts like a 300TE >>>> 1985 300TD needs to be wound up >>>> >>>> _______________________________________ >>>> 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://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://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://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://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://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://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
