75,000 MILE Service, for those who " want to know"
09-07-2004, 01:24 PM
#13
AudiWorld Super User
Join Date: Mar 2000
Posts: 9,779
Likes: 0
Received 0 Likes
on
0 Posts
See all those little glider/guides in there? Ever played with motoX?
All those carriers will groove and wear. Timing belts svck on the B5, part of being an Audi enthusiast I guess...
09-07-2004, 01:31 PM
#14
AudiWorld Super User
Only if it breaks....7/100k doesn't cover maintenance.
09-07-2004, 01:39 PM
#17
Elder Member
Join Date: Oct 2002
Posts: 15,592
Likes: 0
Received 0 Likes
on
0 Posts
Trust me, I know. But putting it back together again is where it gets tricky.
While the timing chain may be just that, a chain, there are a bunch of hoses and wires that I would NOT like to see FUBAR'd.
Even certified techs miss something every once in a while. If an independant shop does the repair, and I come in with a lean condition on my engine, is he going to diagnose the repair for free? How about fix the ripped hose that he accidently nicked on the re-install? I'd hate to be in that position.
But your right. Money is money. I guess we'll see how many of us are still around when we hit the 75k mark. ;-)
Even certified techs miss something every once in a while. If an independant shop does the repair, and I come in with a lean condition on my engine, is he going to diagnose the repair for free? How about fix the ripped hose that he accidently nicked on the re-install? I'd hate to be in that position.
But your right. Money is money. I guess we'll see how many of us are still around when we hit the 75k mark. ;-)
09-07-2004, 02:17 PM
#18
AudiWorld Senior Member
Join Date: Mar 2004
Posts: 1,381
Likes: 0
Received 0 Likes
on
0 Posts
How exactly do you adjust the chain?
My Bentley's CD is at home... and it sucks goats compared to the paper FSM for my 240SX.
A little off-topic Audi-wise, but anyway...
240SX also has chain-driven camshafts. It uses oil-pressure-driven hydraulic tensioners (one each for lower and upper chanis) to compensate for guide wear and chain stretching over time. There is no timing chain adjustment called for in the maintenance schedule; however, chain, guides, and tensioners must be replaced if the chain rattles under acceleration - usually because the engine has been neglected and the oil passages feeding the tensioners got clogged up. If you keep driving with rattling chain it will eventually jump a tooth on the cam sprocket, resulting in major top end damage. Pretty much every 240SX timing chain rattles at idle - some more than others - as the oil pressure is too low to keep the chain tight. Aslo, older 240SX had poorly-designed plastic lower chain guide, and the chain would eat through it after about 70K miles, which required timing chain job as well.
Mine has just over 154K miles on the clock, still original chain and guides, and hot cams for the past ~25K miles, and I'm not planning on a timing chain job any time soon. Despite its age (1995) it is very strong (165HP at the wheels). It has seen only M1 every 3500 miles since new. I guess the point I'm trying to make is that with proper maintenance the timing chain is "lifetime". </rant>
A little off-topic Audi-wise, but anyway...
240SX also has chain-driven camshafts. It uses oil-pressure-driven hydraulic tensioners (one each for lower and upper chanis) to compensate for guide wear and chain stretching over time. There is no timing chain adjustment called for in the maintenance schedule; however, chain, guides, and tensioners must be replaced if the chain rattles under acceleration - usually because the engine has been neglected and the oil passages feeding the tensioners got clogged up. If you keep driving with rattling chain it will eventually jump a tooth on the cam sprocket, resulting in major top end damage. Pretty much every 240SX timing chain rattles at idle - some more than others - as the oil pressure is too low to keep the chain tight. Aslo, older 240SX had poorly-designed plastic lower chain guide, and the chain would eat through it after about 70K miles, which required timing chain job as well.
Mine has just over 154K miles on the clock, still original chain and guides, and hot cams for the past ~25K miles, and I'm not planning on a timing chain job any time soon. Despite its age (1995) it is very strong (165HP at the wheels). It has seen only M1 every 3500 miles since new. I guess the point I'm trying to make is that with proper maintenance the timing chain is "lifetime". </rant>
