Dephaser pulley/compression

[josh11490]

I've recently bought a clio 200, but its down on compression.

Its also got a rattle on over run and fairly flat in the rev range, so I'm assuming it's not been timed up correctly.

My question is, will it not being timed correctly snd the dephaser pulley failing, cause low compression?

Cylinder 1 being the drivers side and then across to gearbox.

Cyl 1 - 150psi
Cyl 2 - 130psi
Cyl 3 - 120psi
Cyl 4 - 130psi



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[robzracing]

I’m short, no. You won’t get low compression through bad timing UNLESS it’s so far out that the valves have touched the pistons and bent.
The fact that the compression is uneven across cylinders is also not a good sign.
Does the engine run? Any signs of burning oil?


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[robzracing]

In short. Not I’m short!! (I’m 6ft)


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[josh11490]

I’m short, no. You won’t get low compression through bad timing UNLESS it’s so far out that the valves have touched the pistons and bent.
The fact that the compression is uneven across cylinders is also not a good sign.
Does the engine run? Any signs of burning oil?


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Runs and drives ok. No oil being used.

It's flat through the revs and there's a rattle on over run.

Just not sure what it could be. I have got a video of the noise if that helps.

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[robzracing]

Have you checked for fuel in the coolant or mayonnaise in the cam cover. Possible a head gasket problem but unlikely.
I would definitely check the timing and perhaps disregard the compression test.
Have you had any over Rev or missed gear incidents recently? This can cause timing to slip and occasionally valves might slightly kiss a piston bending a valve very slightly but not enough to be a catastrophic failure.


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[josh11490]

Have you checked for fuel in the coolant or mayonnaise in the cam cover. Possible a head gasket problem but unlikely.
I would definitely check the timing and perhaps disregard the compression test.
Have you had any over Rev or missed gear incidents recently? This can cause timing to slip and occasionally valves might slightly kiss a piston bending a valve very slightly but not enough to be a catastrophic failure.


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I only bought it Wednesday lol done about 100 miles and thought it didjt feel right but was in my head coming from a faster car. But had a friend drive it and they said nope mot right.

No signs or coolant or HG failure. I got a garage looking at ut over the next week or so. Was just wondering whether I'm looking at a new engine or will get away with belts etc

It's the tapping that concerns me mostly.

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[robzracing]

Post up a video if you can but it’s difficult to tell without it right in front of you.


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[josh11490]

Post up a video if you can but it’s difficult to tell without it right in front of you.


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Appreciate the input so far bud. Had to upload to YouTube





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[barnesautos]

Link above didn’t work for me.

Sounds like a dephaser for sure .

Copy paste this into YouTube

GYcRvyWvYus

 

[robzracing]

Definitely sounds like a problem with the valve train. You might have a broken lifter.


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[josh11490]

Link above didn’t work for me.

Sounds like a dephaser for sure .

Copy paste this into YouTube

GYcRvyWvYus

I think it was because I had literally uploaded it, it works now.

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[josh11490]

Definitely sounds like a problem with the valve train. You might have a broken lifter.


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Head rebuild job then? Hmmm

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[robzracing]

I’d say so I’m afraid.
Private purchase I assume


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[josh11490]

I’d say so I’m afraid.
Private purchase I assume


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Sort off, long story! But I've had a fairly decent amount of cash back to fix the car. So I'm not annoyed.

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[robzracing]

Fair enough. Hope you’ve got a good garage nearby to sort it. Assuming you’re not doing it yourself.


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[josh11490]

Fair enough. Hope you’ve got a good garage nearby to sort it. Assuming you’re not doing it yourself.


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Depends what it is tbh, I can do with with my dad. But gotna 4 month old and work a lot of hours, so will see! Cheers for the advice

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[robzracing]

Good luck!


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