Question about 2003 Mazda Mazda6

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Lack of power when acclerating

Replace 2.3L motor with a used one 2.3 L when replaced needed to send head out to have valve job done on it. head returned and put it on linning all timing makes up and when started to motor has lack of power. when reasembled we used the parts from the used motor we got. the junk yard told us that there was no difference they were the same year and model car. 2004 mazda 6. i did find some different parts but changed them to the parts from car.

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Could be anyything, form a crank sensor to a map sensor to a maf sensor, is the check engine lite on?

Posted on Jul 24, 2009


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I have an 03 vw jetta 1.8 turbo. The timing belt has broken according to the mechanic. My question is this what is called a "contact motor" which requires a lot more work such as head work etc....

You have a contact or interference engine. This means that there is not enough room between the top of the piston when it is all the way up for the valves to be open. What happens is they get hit by the piston and they bend or break. You will have to take the head off and send it to an engine rebuilder. MAKE SURE they know Volkswagons or you will likely be taking the head off again and sending it back out. Normally valves and valve guides need to be replaced, you are looking at about $1200-$1500 for a proper job. Also you will need new head bolts, VW head bolts are not deisigned to be reusable. (Been there, done this).
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I have a 1998 Volvo S70. Its been making knocking noises when I drive it and there's water all over the dip stick for my oil. I've heard my motor us probably done for but I wanted another opinion....

If there is water in your oil, STOP. There have to be other symptoms such as needing to add water, loss of power and poor running condition. This is an indication of needing a new head gasket and is an involved job. The more you continue to drive it the more damage is done to the head, cylinders and engine block. If this has just started, you stand a better chance of having the gasket replaced, cylinder head machined (might as well have the valves ground while it is off and have new valve stem seals installed), oil changed and the cooling system flushed. Have the timing belt replaced as well if it has not been done in 60,000 miles or is getting close it. Good cars and are worth the money. Mkae sure it is a trusted tech who also knows German/Swedish cars, good rep., and offers a warranty with his workmanship.

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1 Answer

My clutch is slipping - rpms acclerate but car has no power barely moves. how expensive is it to replace a manual clutch?

$900.00 if the entire job is done correctly

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Mar 19, 2011 | 2004 Kia Spectra

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My nan's car broke a timing belt well befor being due. Its out of warranty howeva I'm a mechanic but have had little to do with hyundai having done my time with ford. My question is she was only going slow...

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Aug 25, 2009 | Hyundai Motor 1998 Sonata

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2004 f150 supercrew 4x4 lack of power and very bad fuel mileage

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1 Answer

1995 Plymouth Acclaim Cylinder Head Removal

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Oct 26, 2008 | 1995 Plymouth Acclaim

1 Answer

03 focus head removal

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Jun 21, 2008 | 2003 Ford Focus

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