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Old 10-13-2005, 02:47 PM   #1
subarwho?
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Chapter/Region: E. Canada
Location: newfoundland
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2002 wrx
psm

Default timing belt slip

My car was loosing power yesterday so I took it in to subaru. They tell me that the timing belt was off by a few teeth.

How serious it this with the engine being interferance type? How far off do you have to be before pistons heads start hitting valves?
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Old 10-14-2005, 04:55 AM   #2
specialev
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You would know if your pistons were hitting the valves. A ghastly noise would shortly be apparent, followed by it's cessation, along with your motor shutting down. Permanently. You've gotta be off by about 45 degrees in valve timing to hit the valves, I suspect, which corresponds to quite a few mis-indexed teeth.

Were you getting any CELs? Usually a slipping belt is accompanied by a check engine light WRT a misfiring condition.

If you know you have need for a timing belt, don't mess around or wait for a complete failure; get it fixed.

-Cheers
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Old 10-14-2005, 05:40 AM   #3
00Maddog
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actually two teeth off at the crank has been known to collide with the valves. also if the cams become out of sync with each other the valves can hit other valves. sounds like you might be missing the belt guard over the crank pulley. if this is missing, and you park with the car in gear, (big nono!) the timing tensioner can be depressed from the weight of the car rolling against the engine, and when you start it it will jump time. those guards are installed to prevent this from happening on the barge from japan. this obviously only applies to manuals. use the park brake!
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Old 10-14-2005, 11:34 AM   #4
subarwho?
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I was getting lots of cells, but I have always had infamous 1&4 misfire code since I bought the car. Subaru have new updated ECU on the way for me to fix it.

This problem occured suddenly. Two days ago I was driving the car to work and noticed that the car was hesitating and suging between 2000 and 3500 RPM. I got on the highway and it took me about 30 seconds to acceletate from 100 to 120 in 5th gear, and it would go no faster. That when I knew something was wrong for sure, teh car seemed to be cutting fuel. They had a look at it and said it was probaly a cam shaft sensor btu it later turned out to be the timing belt.

Sould I not park my car in gear, or just not in gear without the handbreak on? My driveway is sloped so I always park in gear with the handbreak on.
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Old 10-15-2005, 09:31 PM   #5
00Maddog
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just use the handbrake only, or make sure you have the belt guards and they're adjusted correctaly. sometimes careless techs will leave them off when they're in a hurry, cause they rarely come into play. i'm not saying for sure thats what happened, but it sounds plausible. i could post a pic of the guards if you want, have to make a trip out to the garage.

Jerry

btw the guards are only on manual trans cars , go figure
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Old 10-16-2005, 08:43 PM   #6
wrxspdr
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I can't imagine a timming belt slip although maybe the timing belt tentioner is weakened. Also YES the timing belt on the WRX can be I think 1 tooth mark off this is a known issue and supposedly is tolerable I know mine is. Subaru notes this as exceptable. It's a huge timing belt..I can't believe that youre having a diagnostic code since you got the car that doesn't sound good. Hey post that pick of the gaurd I am curious what that looks like.
Good Luck
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