Re: [MBZ] SDL overheating
On Fri, 13 Oct 2006 06:17:27 -0700 Jim Cathey [EMAIL PROTECTED] wrote: And pay particular attention to get the big bolt that holds the tensioner to the timing chain vault torqued correctly. If it works loose it'll ruin the chain vault cover. You won't like that. Dave Meimann certainly didn't! Craig
[MBZ] SDL overheating
I'm wandering down the path of this SDL's overheating problem and I notice something screwy. The tensioner has been bypassed. I tried to spin it with my hand, and it's locked solid. Hrmcould the lack of a tensioner allow the belt to slip enough to overheat? -- Luther KB5QHU Alma, Ark '87 300SDL (270,491 mi) head case? '83 300SD (241 kmi) '82 300CD (162 kmi) '82 300D (74 kmi) needs MAJOR engine work
Re: [MBZ] SDL overheating
I can push the belt down so it touches the vacuum pump. When I pull up on it, I feel there is more than 1 inch of slack play. Seems too loose to me, but I have never owned a serpentine belted engine. On Thu, 12 Oct 2006 19:45:18 -0500, Kaleb C. Striplin [EMAIL PROTECTED] wrote: Really, I hadnt looked at that. The belt is tight though isnt it? Luther Gulseth wrote: I'm wandering down the path of this SDL's overheating problem and I notice something screwy. The tensioner has been bypassed. I tried to spin it with my hand, and it's locked solid. Hrmcould the lack of a tensioner allow the belt to slip enough to overheat? -- Luther KB5QHU Alma, Ark '87 300SDL (270,491 mi) head case? '83 300SD (241 kmi) '82 300CD (162 kmi) '82 300D (74 kmi) needs MAJOR engine work
Re: [MBZ] SDL overheating
yea, thats too loose. You probably need a new tensioner. Luther Gulseth wrote: I can push the belt down so it touches the vacuum pump. When I pull up on it, I feel there is more than 1 inch of slack play. Seems too loose to me, but I have never owned a serpentine belted engine. On Thu, 12 Oct 2006 19:45:18 -0500, Kaleb C. Striplin [EMAIL PROTECTED] wrote: Really, I hadnt looked at that. The belt is tight though isnt it? Luther Gulseth wrote: I'm wandering down the path of this SDL's overheating problem and I notice something screwy. The tensioner has been bypassed. I tried to spin it with my hand, and it's locked solid. Hrmcould the lack of a tensioner allow the belt to slip enough to overheat? -- Kaleb C. Striplin/Claremore, OK 91 300D 2.5 Turbo, 90 420SEL, 89 560SEL, 87 420SEL, 87 300SDL, 87 300SDL #2, 86 300SDL, 84 380SE, 84 190D 2.2, 84 190D 2.2 #2, 81 240D, 76 240D, 76 300D, 72 250C, 69 250 http://www.striplin.net
Re: [MBZ] SDL overheating
And the proper belt. Check the tensioner arm to make sure that it's pivot bearing isn't shot -- that's what has gone out first on both of my 60x engines --- On 10/12/06, Kaleb C. Striplin [EMAIL PROTECTED] wrote: yea, thats too loose. You probably need a new tensioner. -- OK Don, KD5NRO Norman, OK The Americans will always do the right thing... after they've exhausted all the alternatives. Sir Winston Churchill '90 300D, '87 300SDL, '81 240D, '78 450SLC, '97 Ply Grand Voyager
Re: [MBZ] SDL overheating
Just passed over the crank pulley, it likely will slip. Needs a tensioner and a new belt, will make a big difference. Peter
Re: [MBZ] SDL overheating
I'll replace ALL of the tensioner parts if I'm going to be in there On Thu, 12 Oct 2006 20:10:26 -0500, OK Don [EMAIL PROTECTED] wrote: And the proper belt. Check the tensioner arm to make sure that it's pivot bearing isn't shot -- that's what has gone out first on both of my 60x engines --- On 10/12/06, Kaleb C. Striplin [EMAIL PROTECTED] wrote: yea, thats too loose. You probably need a new tensioner. -- Luther KB5QHU Alma, Ark '87 300SDL (270,491 mi) head case? '83 300SD (241 kmi) '82 300CD (162 kmi) '82 300D (74 kmi) needs MAJOR engine work
Re: [MBZ] SDL overheating
Hi Luther, While you're in there replacing all the tensioner components (the best approach) - I also suggest you take this opportunity to check the timing chain stretch - since you;ll need to turn the engine with the crank bolt to align the timing marks on the cam and cam tower - and the crank bolt is only accessible with the fan shroud out of the way. If the tensioner is similar to the one on my 602-962 (91 300D 2.5T) the replacement work is pretty easy. Good luck - Larry T (67 MGB, 74 911, 78 240D, 91 300D) www.youroil.net for Oil Analysis and Weber Parts Test Results http://members.rennlist.com/oil PORSCHE POSTERS! youroil.net Weber Carb Info http://members.rennlist.com/webercarbs Porsche Road Test http://members.rennlist.com/roadtest/ . - Original Message - From: Luther Gulseth [EMAIL PROTECTED] To: Mercedes Discussion List mercedes@okiebenz.com Sent: Thursday, October 12, 2006 9:50 PM Subject: Re: [MBZ] SDL overheating I'll replace ALL of the tensioner parts if I'm going to be in there On Thu, 12 Oct 2006 20:10:26 -0500, OK Don [EMAIL PROTECTED] wrote: And the proper belt. Check the tensioner arm to make sure that it's pivot bearing isn't shot -- that's what has gone out first on both of my 60x engines --- On 10/12/06, Kaleb C. Striplin [EMAIL PROTECTED] wrote: yea, thats too loose. You probably need a new tensioner. -- Luther KB5QHU Alma, Ark '87 300SDL (270,491 mi) head case? '83 300SD (241 kmi) '82 300CD (162 kmi) '82 300D (74 kmi) needs MAJOR engine work ___ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.408 / Virus Database: 268.13.2/472 - Release Date: 10/11/2006
Re: [MBZ] SDL overheating
I'll replace ALL of the tensioner parts if I'm going to be in there Good idea, really. I've had failures of _all_ those parts at one time or another, and on only two cars! The rocking bearing, though stout, really takes a beating and doesn't hold up well. The spring can break. The shock can break and/or wear out. The idler bearing can dry out and/or seize. The idler pulley can be worn to a nub. And don't forget the two plastic caps that go over the two bearings to keep the dirt out. And pay particular attention to get the big bolt that holds the tensioner to the timing chain vault torqued correctly. If it works loose it'll ruin the chain vault cover. You won't like that. -- Jim
