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Help Needed

stocko

By stocko,
in Engines & Forced Induction

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stocko Contributor

stocko

Posted
Posted

hey guys you may have read my other thread about low compression across all 6 pistons well, i have checked everything i know.

i pulled the cam covers of and put a spanner on the nut part at the front of the cam and gently pulled on the cam and held the cam gear to see if there is movement between the joins and i have nothing on the exhuast cam, on the inlet cam with the variable valve timing cam gear i did they same and i had a inch of movement is this correct

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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted (edited)

lol

did you post a thread about this before ?

I think i told you to check the cam with a shifter? pull the gear off, your locater might have snapped like mine did the other day, if you keep driving it like this it could destroy your engine.

Pull it appart and be carefull when doing so cos the pin that snapped will fall into the timing case and you dont want that to happen cos you will need to get it out!

Yes this is what i said.

YES the cam gear can move on the cam, if the dowl locator snapps on the cam then what happens is that the gears are still in time but the cam is retarded, this happened to my engine and it had 30psi in all cyls and it still ran as well.

Take the harmonic balancer off, take the timing covers off and put the engine on TDC and make sure the bottom timing mark is correct as well as the top ones.

Get a shifter and put on the cam (you need to take the cam covers off) and try turn the cam gently. If the cam turns without the cam gear turning then you would have snapped the dowl and it might only be a little bit out. It can get worse and if you dont fix it now it could slip around and smash valves.

This is what to do next.

1: PUT A RAG OR A DRIP TRAY under the engine because oil will leak out of the front of the cam

2: You need to take the 4 really small 8mm bolts off from the front of the inlet cam, it is spring loaded and lots of oil will come out.

3: undo the 19mm bolt that holds the cam in (it might be loose but undo it BEFORE taking the timing belt off because that way the gear wont spin when trying to undo it also use the spanner to hold the cam in place)

4: remove the bolt and the gear CAREFULLY, you should find the little locator snapped inside the gear, when you remove it as soon as it slips of the cam tilt the front of the gear that goes over the cam upwards so the bit does not fall out.

5: inspect cam, you will find that the locator is snapped.

You will need to buy another cam to fix this or get someone to drill out and replace the locator on your existing cam. I purchased a new cam.

The GOOD news is the engine is not buggard, the valves have not hit YET.

Replace the cam and the timing belt while your at it and make sure the head is not scored on the first cam cap if it is rub it back with some 1200 sand paper till its smooth again.

Edited by Guilt-Toy
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Guilt-Toy Grand Master

Guilt-Toy

Posted
Posted (edited)

you cant be serious? the cam gear wont move on the cam unless its loose or snapped, can you see the dowel in the cam?

are you sure ?

Look at the cam, it should have a little pin sticking out of it and if you look inside the gear you can see where the pin is supposed to go, if its snapped the face of the cam will be flush, if not you will see it sticking out.

take a clear pic of the face of the cam, and send it. the locator pin will have to be broken if the gear is moving on the cam.

Was the 19mm cam bolt tight ?

i just finished pulling both cam gears off and guess what no snapped dowels :(

i really dont know what to do ????

thanks guilt-toy

Edited by Guilt-Toy
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stocko Contributor

stocko

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Posted

hey guys pulled the head off yesterday because when i was checking everything i noticed that a exhaust manifold nut was loose, i tried to tighten it but the stud was really loose in the head i then noticed a shit load of oil all over my block and guess what......i only got all my manifold bolts replaced 4 months ago and the wankers drilled right thought to number 1 tapppet ill take a foto and show u all

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