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Hi! Engine timing pulley question and general technical info. We are trying to get the timing correct on this 1993 Subaru Impreza LS. We noticed this one pulley jumps to three different locations,(loc

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  • Cars & Trucks Expert
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The left and right pulleys are Camshaft pulleys. The small one in the middle is the crankshaft pulley.
All three need to be lined up. They all have their own marks/notches.
I'm guessing you're not lined up and your cam is jumping.
CHANGE THE WATER PUMP TOO!

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Posted on Dec 31, 2012

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You have attempted a very difficult task without a service manual! First of all, there are precise timing marks on each cogged gear that have to STAY on those marks. There are tensioners that will keep the belt on those marks as you tense them up. Please do not start the engine unless the marks are perfectly aligned or you will surely damage the engine!!! Get the service manual, if you do not have it already!!!

Posted on Dec 31, 2012

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Agree totally with what Leigh said. The pulley in question is the camshaft sprocket.` It "jumps" without the belt on because it has to open valves as it turns to next position.
Yes, find the procedure for timing belt installation, so you know where to set the sprockets or cogs on. Mark on the sprocket with mark on the block or back of timing cover. Cannot stress the importance enough of a repair manual. Just as Leigh said, I wanted to only support that.

Posted on Dec 31, 2012

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freetek
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If you have any of the large chain auto parts stores in your area, call them and ask if they do free scans; most do.
If Subaru has maintained the same procedures for a while, and you have checked fluids, etc., you can try resetting the light via the ignition switch:
-Turn on the ignition (don't start) - switch it rapidly between the 'ignition on' and 'ignition off' positions three times.
If the error has cleared itself (not uncommon), the check light will reset. If the problem is still present, it will either stay or come back on.
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Pls. give this a rating, thank you.

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