Question about 1993 Subaru Legacy

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We replaced the water pump! Now it has jumped time. Which piston do you set the timing from

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1 at top dead centre timing marks should line up you will find marks on cams and at balancer down the bottom

Posted on Jun 07, 2010

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The number one piston is the farthest forward, always on any engine. It has to be at TDC on the comp stroke, which will also be where the mark is, it is just a dot on the crank pulley aligning to a dot or a v on the case. The cams need to be on the marks too, take out the plugs so you can turn the engine easily by hand. Do not let the valves interfere with the cams, make sure they stay free. If the belt is off which I assume it is, or will be, turn the engine over with the belt on, So you will only have to watch one side. It is a tight fit. I hope you didn't damage anything when it jumped. Check it out.
In case you did, I have a set of j25? heads here.

Posted on Jun 07, 2010

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My 1994 audi 90 s 2.8litre v6 front wheel drive has jumped time apon me replacing the water pump what do I do ?


Hope its not a interferance motor or you could have valvetrain piston damage. If not tear it back down and replace and adjust timing to correct position.

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Water pump locked up on 1997 Isuzu Rodeo,V-6.Mechanic told me it also jumped time and would be 1600.00 to repair.Does this sound correct?


it is possible this happened since the 97 Isuzu engine is an interference engine and has a timing belt, not a chain. When the pump locked up, the stress of the non moving water pump could have forced the belt to jump time. this then in all probability damaged valves in the head since they collided with the moving pistons, making this a very expensive problem. You might consider trying to find a used engine in good condition as it might be less to swap an engine than to fix this one, or you could price this repair in other facilities. It's a 97 so you will find these engines in many locations like ebay, junkyards and Craigslist.

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If a timing belt breaks on a 98 toyota camry does it mess up the valves? I have replaced my timing belt, serpintine belt, fuel pump, water pump, and cranckshaft censor. It trys to turn over but wont start...


If the timing belt broke while you were driving then unfortunately yes the valves can get messed up. The piston(s) can hit the valve(s) as it comes to the top of it's stroke. Common for valves to get bent and less common for pistons to crack.

If you installed a new timing belt, I would make sure the valve timing is set and then do a compression test.

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you may have to refit the timing belt as it sounds like it has jumped and upset the timing again it is important to ensure any slack is close to the tensioner to prevent any movement when re-engaging the tensioner i hope there is no other damage as a result of the noise(bent valve)

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I have a 91 300zx non turbo won't start


Are you sure the new belt didn't jump time? How was the belt tensioner when you replaced yhe belt? Did your water pump leak onto or into your crank sensor?Are you sure you have proper fuel pressure?When you replaced the timing belt, did you make sure to find top dead center on cylinder 1 ? Just lining up the timing marks may not have worked if this is indeed what you did.If you had the crankshaft rotated 180 degrees, your motor would be trying to fire on the exhaust stroke, instead of the compression stroke. To find T.D.C. disconnect your battery,rotate your crankshaft until the piston that is marked #1 in your firing order is at the top of its stroke, this can be accomplished by carefully inserting a wooden or plastic dowel into the sparkplug hole of cylinder#1. The dowel will rise with the piston and at the point where it starts to fall will be T.D.C. Now your timing marks should line up,and you will then be on the compression stroke. good luck! hope this helps

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My 04 chevy aveo just had the timing belt and water pump replaced, and then the mechanic said 2 of the 4 cylinders were bad and the vlaves were bent. does that happen?


I just wanna know how was it possible for him to know the (hidden under the cylinder head cover) valves were bent while only changing the timing belt and water pump ( both located at the side of the engine).

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95 toyota camry died and turns over but wont crank


If your timing belt broke while driving, there WILL be engine damage. Valves will not be moving in response to your pistons continuing to move. I hope that it is not your timing belt. Check your ignition module, first, that's easier.

Hope this helps!

Dec 07, 2009 | 1995 Toyota Camry

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Will a broken timing belt and water pump require replacement of engine head valves 1 and 3?


If this is 2.0 liter duel over head cam than engine damage most likely will happen if the timing belt brakes sorry about the bad news .

Sep 29, 2009 | 1998 Dodge Avenger

2 Answers

1999 dodge carava, replaced water pump....won't


i would start by finding the timing marks give the dealer a call just to make sure that the belt runs it if so you will have to remove the belt and set the timing marks and make sure they dont move if you get that rite you should be fine but ask the dealer to make sure im not to sere on that vehical

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1 Answer

Audi a4 1.8 t quattro 2003


Hi

This isn't too bad a job as timing belts and water pumps go, but then I've done so many timing belts and water pumps on so many different vehicles its all just a blur now!!

It is always recommended that if you release the tension from an old timing belt then you should fit a new belt and discard the old one.

I would also urge you not just to fit a timing belt. Buy a whole belt kit. You should change everything the belt touches which runs on a bearing, and apart from the water pump, it will all be included in the belt kit. The water pump is purchased seperately.

If any of the bearing-run components pack up then it will be just as devastating to the engine as a broken timing belt, because the timing will jump several teeth and valves and pistons will collide. The belt may even sheer or snap.

It is for this reason that if I ever get a call out for a routine timing belt change, I always advise the full kit, and the water pump.

It may sound a bit expensive to be replacing items that may not require changing, but if you think its only once every six years or so then its not that bad.

It is also very important to observe the torque settings for the center bolts of any pulley wheels (idlers and tensioner). If you whack them up too tight then the applied forces from the timing belt, instead of being dissipated through the bolt and into the engine, will instead act upon the bolt and it will eventually snap.

Apart from that, the very best of luck with it.

Regards

Geordie

Jun 09, 2008 | 2003 Audi A4 Cabriolet

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