 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Mazda / Mazda Cars / May 2008Mazda 929 Broken Timing Belt
Anyone experience a broken timing belt on a 1988 929 engine? Son's car just had this happen and we are wondering what the chances are that things (pistons valves) 'survived? I am assuming that this is a destructive engine. Car was only going about 15 MPH when this happened. We would like to undertake repairing this ourselves.Anyone gone though this? Any advice appreciated. Thanks. > Son's car > just had this happen and we are wondering what the chances are that things > (pistons valves) 'survived? I am assuming that this is a destructive > engine. It depends... Cars with dished top pistons (or even flat top pistons with divots where the valves would normally impact) can survive a broken timing belt just fine... I had this with my old FORD ESCORT WAGON (1991). My timing belt broke in the middle of nowhere at 100 KM/HR. I didn't even no what it was originally, and tried to start the engine, etc. at first. Anyway, got a new timing belt installed at the next town, and continued on my trip without incident. Not all cars are this lucky however. Still, it may be that the top of the pistons on your engine have the "divots" that protect them from a valve that is down at the wrong time -- almost entirely due to a timing belt failure. Just check with an experienced MAZDA mechanic to see if the engine design is such that it is protected from a valve that is hanging down after a belt breakage. You might also be able to track down the info. on the web. Look even at an auto-parts web store for the pistons that go with your car's engine. The appearance of the tops of the pistons might tell you a lot right there. Hope that helps! >Anyone experience a broken timing belt on a 1988 929 engine? Son's car >just had this happen and we are wondering what the chances are that things [quoted text clipped - 5 lines] > >Thanks. Go to this site to see if the engine is interference. Bottom right of the page. http://www.gates.com/index.cfm?CFID=11540387&CFTOKEN=42972810 Pete > Go to this site to see if the engine is interference. Not good... says Interference Engine... Yuck! I'd plan for engine damage. I got concerned so checked my own '99 Mazda 626 LX-V6 and it doesn't say intereference for that year and model. Also, I checked my old '91 Ford Escort Wagon with the 1.9L 4CYL and sure enough, it also was okay. Thanks for the advice. So yes this is an 'interference' engine. Yuck. Amazing how such expensive cars now have these rubber timing belts ..... shame how so many cars end up in the salvage yard because of them. Guess my next step will be to pull the heads. >>Anyone experience a broken timing belt on a 1988 929 engine? Son's car >>just had this happen and we are wondering what the chances are that things [quoted text clipped - 13 lines] > > Pete >Thanks for the advice. So yes this is an 'interference' engine. Yuck. >Amazing how such expensive cars now have these rubber timing belts ..... >shame how so many cars end up in the salvage yard because of them. >Guess my next step will be to pull the heads. Or install the belt and with all the guards off, check if you get compression in all the holes. You have to open up the timing belt area anyway and you could get lucky. The few extra minutes to do the belt first may be a cost saver. Pete Guess we were very very lucky. With new belt installed, compression readings range from 125 to 150 PSI so I am assuming that is normal for an engine with 130K miles. But belt does appear a little loose/slack however, so will be looking for a new tensioner before closing it up. Thanks for the advice guys. Bob >>Thanks for the advice. So yes this is an 'interference' engine. Yuck. >>Amazing how such expensive cars now have these rubber timing belts ..... [quoted text clipped - 7 lines] > > Pete > Bob wrote > Anyone experience a broken timing belt on a 1988 929 engine? Son's car > just had this happen and we are wondering what the chances are tha things > (pistons valves) 'survived? I am assuming that this is destructive > engine. Car was only going about 15 MPH when this happened > > We would like to undertake repairing this ourselves.Anyone gon though this? > Any advice appreciated > > Thanks Hi this is my first post Had the same problem with my 1988 929 with a belt that had only don 40,000km (2nd timing belt) Reason: Top idler pulley seized causin the belt to self destruct due to heat build up! When I stripped th engine to examine cause discovered ALL 3 idlers including tensione wheel to have either marginal or shot bearings. 140K total mileag which isn't much SO BEWARE it looks like these bearings do not age gracefully and los the factory packed lubrication over the years and finally fail. I' not sure if my engine has survived but everything turns over OK - n metallic clunks so I believe this may not be an interference engin as suggested and hope to have the car back on the road within th week Mazda here in Melbourne Australia want $200 each for each new idle wheel so I am currently trying to track down alternatives. Th internal bearings are easy to replace and mine are NSK 6203DWAX. An advice on economically replacing all 3 idler piulleys would b appreciate
|
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.