Re: [MBZ] Valve clearance
On Tue, Feb 07, 2006 at 11:52:07PM -0500, John Berryman wrote: > There are specs in some MB manuals for a hot (read warm) adjustment. > Cold is more accurate. Give an extra .0005-.001" as Marshall mentioned > if you live in a real cold climate like I do. The toyota guys I know who are stuck with a warm adjustment are kicking themselves for not writing down the cold specs any time I point out that I can do the 300D's valves cold. Having done valves cold and hot, I prefer cold myself. K
Re: [MBZ] Valve clearance
On Tuesday, February 7, 2006, at 09:32 PM, David Johnson wrote: Thanks so much, Marshall. As usual, you're the Encyclopedia for the list. This will be my first valve job, and I'm glad that you mentioned that the engine needs to be cold. I surely didn't know about this requirement. Since I'm planning to do this myself, that shouldn't be a problem. I wonder, though, how the dealership/Indie gets around this issue. A car will be instantly out of specs the next morning when the engine cools down and all the metals contract. David There are specs in some MB manuals for a hot (read warm) adjustment. Cold is more accurate. Give an extra .0005-.001" as Marshall mentioned if you live in a real cold climate like I do. Johnny B. I Mac Therefore I am
Re: [MBZ] Valve clearance
On Tuesday, February 7, 2006, at 08:14 PM, David Johnson wrote: How often should I check the valve clearance and the timing chain(?) tension in a 123? What are the specs on these parameters? Thanks. David 83 300 DT 230,000 Twice a week will keep you well enough informed but 15,000mi is the recommendation. in .004" out .014" no more than 5 degrees stretch. The engine has a tensioner that mysteriously keeps things right all by itself. If you buy Amsoil from me and pour it in your engine you may never even have to look in there again, I personally like to peek now and then. Johnny B. I Mac Therefore I am
Re: [MBZ] Valve clearance
Thanks so much, Marshall. As usual, you're the Encyclopedia for the list. This will be my first valve job, and I'm glad that you mentioned that the engine needs to be cold. I surely didn't know about this requirement. Since I'm planning to do this myself, that shouldn't be a problem. I wonder, though, how the dealership/Indie gets around this issue. A car will be instantly out of specs the next morning when the engine cools down and all the metals contract. David --- Marshall Booth <[EMAIL PROTECTED]> wrote: > Valves need to be checked every 15kmi (I checked > them every fall, before > really cold weather). They need to be checked COLD > (engine not run for > 6-8 hours) __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
Re: [MBZ] Valve clearance
David Johnson wrote: How often should I check the valve clearance and the timing chain(?) tension in a 123? What are the specs on these parameters? Thanks. David Valves need to be checked every 15kmi (I checked them every fall, before really cold weather). They need to be checked COLD (engine not run for 6-8 hours) and for your engine, intake valve clearance is 0.1 mm (0.15 if temps could drop below zero F) and exhaust valves should have 0.35 mm clearance. When checking the valves, chain stretch needs to be measured. If chain stretch exceeds about 5-6 degrees, the chain needs to be replaced to correct valve and injection pump timing (it's unlikely to snap before stretch reaches 8-10 degrees). Marshall -- Marshall Booth (who doesn't respond to unsigned questions) "der Dieseling Doktor" [EMAIL PROTECTED] '87 300TD 182Kmi, '84 190D 2.2 229Kmi, '85 190D 2.0 161Kmi, '87 190D 2.5 turbo 237kmi
