Valve rocker clearances

[Andrew Clayton]

I don't know about "normal" Mercedes but I have a 190E 2.3-16 Cosworth and they also use shims. I'm happy working on the TC but leave this complicated stuff for the experts. Cheers, Andrew Clayton TC 4054 Melbourne, Australia

----- Original Message ----- From: "David Lodge" archie_ponsonby@post.cz> To: davea@symbolicdisplays.com>; mg-tabc@yahoogroups.com> Sent: Saturday, July 02, 2005 11:03 AM Subject: Re: RE: [mg-tabc] Valve rocker clearances > Hello Dave, > > Ditto Alfa Romeo! > > Regards, Dave L. > > > ----- ORIGINAL MESSAGE ----- > From: "Dave A" davea@symbolicdisplays.com> > To: mg-tabc@yahoogroups.com > Subject: RE: [mg-tabc] Valve rocker clearances > Date: 30.6.2005 - 16:44:24 > >> Hello all! >> >> I don,t know about Mercedes, but on a Jag you have to >> PULL THE CAMS to >> change the shims under the lifters which makes the >> adjustment to the valves. >> A long sentence, and alot of work! It can only be done >> cold...... >> >> Cheers, >> >> Dave 48' TC >> >> >> >> -----Original Message----- >> From: mg-tabc@yahoogroups.com >> [mailto:mg-tabc@yahoogroups.com]On Behalf >> Of Chip Old >> Sent: Wednesday, June 29, 2005 11:36 PM >> To: MG-TABC >> Subject: Re: [mg-tabc] Valve rocker clearances >> >> >> On Wed, 29 Jun 2005 15:43 -0400, Peter Roberts wrote: >> >> > "Fascinating. I have before me two workshop manuals, >> > one from Mercedes, >> > and one from Jaguar. Both are explicit that valves >> > are to be adjusted >> > on cold engines. To quote Mercedes, " The valve >> > clearance on all >> > gasoline engines should be checked and, if necessary, >> > adjusted when the >> > engine is cold." >> > >> > My original TC Owner Manual is not specific on hot or >> > cold engine >> > adjustment. My Chilton TC Manual is clear that it >> > should be hot. >> > Blower is specific that it should be hot. What does >> > Mercedes know that >> > Chilton and Blower don't? >> >> What Mercedes knows is that valve clearance on all >> Mercedes gasoline >> engines is to be adjusted cold. Same for Jaguar, and >> any other >> manufacturer that specifies cold adjustment. That "all >> gasoline engines" >> in the Mercedes manual doesn't mean every gasoline >> engine regardless of >> manufacturer. It means "all Mercedes gasoline >> engines", which is all that >> manual was written for. >> >> Some manufacturers specify cold adjustment, some hot. >> MG specified hot >> for the XPAG/XPEG. If you prefer to use a Mercedes >> manual to maintain >> your MG, well, it's your car. >> >> -- >> Chip Old 1948 M.G. TC TC6710 XPAG7430 >> NEMGTR #2271 >> Cub Hill, Maryland >> fold@bcpl.net >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> >> >> >> >> >> >> Yahoo! Groups Links >> >> >> >> >> >> >> > > > -- > Revolu n vysokorychlostn INTERNET jen za n zk m s n pau l > 399 K . Nav c aktivace ZDARMA! V ce na > http://www.revolucniinternet.cz > > > > > Yahoo! Groups Links > > > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.8.8/35 - Release Date: 30/06/2005 > >

[Paroor]

Dear Andrew Clayton, The valve setting in TC is not that big deal. The car industry is always developing new more comfortable methods. In my motorcycle they used shims to compensate the gap. The problem is that you had to buy the box of shims where you need one or two. So it is cheaper to give the car or motor cycle to the service shop for vale gap check up. The MB models since late 1980s are equipped with Hydrostoessel valve gap compensator always touching the cam. Practically there is no gap. You can simply describe it this way. We have a screw to adjust valve gap on our XPAG. Instead of this screw mechanism they fixed a cup with small spring and valve mechanism. This small cup is covered by a cap ( or up side down cup). The cap is pressed by means of a small spring against the cam. The cap also let oil flow into the cup via a small hole (valve). At the moment the cam start pressing the cap the small hole (Valve) in the cup is closed and the mechanism will become one solid mass. This oil inside the cup can not be compressed. But it compensate the gap. So valve gap setting become history on old cars. A picture will make it easy to understand. May be I did not describe it properly. Best regards Madhu -----Urspr ngliche Nachricht----- Von: mg-tabc@yahoogroups.com [mailto:mg-tabc@yahoogroups.com]Im Auftrag von Andrew Clayton Gesendet: Samstag, 2. Juli 2005 12:58 An: mg-tabc@yahoogroups.com Betreff: Re: RE: [mg-tabc] Valve rocker clearances I don't know about "normal" Mercedes but I have a 190E 2.3-16 Cosworth and they also use shims. I'm happy working on the TC but leave this complicated stuff for the experts. Cheers, Andrew Clayton TC 4054 Melbourne, Australia