Loud tapping/ticking noise

[gazmangti]

Hi all,

Got a mk3 polo coupe 1.3 and ever since i got it has made a loud tapping/ticking noise and just can get to the bottom of it.

I have carried out the following work.
Changed the tappets,
Several out flushes,
Changed the exhaust manifold gasket and downpipe gasket,
checked for air leaks.
checked the injector.

Now I am lost for ideas and was wondering if it something more serious like piston slap or big end wear.

Any ideas.

When I changed the tappets it did go quite for 30 seconds. But started agian. Could the oil pump not be pumping properly?

Cheers

Gaz

[gazmangti]

anyone

[MrP]

I'd say oil pump, if not your engine is poooped!

[SpikeyG40]

is it a multi point injection engine or the single?

sometimes the injectors get a bit tappy/ticky!

other than that, i'd say the tappets, but as you've changed them already, it couldn't be them! i'll have a think!

[gazmangti]

Single point injection. Also it eats through spark plugs. If that has anything to do with it. Only changed them two months ago and now they need changing again.

[gazmangti]

This is another thing that makes me wonder. Every couple of months the plark plug on number 1 cyclinder cracks and has to be replaced. Have a look. Could this be an inlet or exhaust valve sticking?

No.2,3 and 4 look great like this.


BUT. No.1 looks like



What do you guys think?

Cheers
Gaz

[SpikeyG40]

hmm, is it misfiring on number 1? it looks like she isn't burning the fuel off!

have you changed the HT leads at all? also, might be worth checking that they are the correct plugs for the car. they probably are, but i thought they would have been single pronged plugs and not the three pronged!

[gazmangti]

The ht leads are fine. They are pretty much brand new. They are NGK BP5ET.

These are different plugs to others. Still only happens on this cyclinder.

[JWC]

Hi all,

Got a mk3 polo coupe 1.3 and ever since i got it has made a loud tapping/ticking noise and just can get to the bottom of it.

I have carried out the following work.
Changed the tappets,
Several out flushes,
Changed the exhaust manifold gasket and downpipe gasket,
checked for air leaks.
checked the injector.

Now I am lost for ideas and was wondering if it something more serious like piston slap or big end wear.

Any ideas.

When I changed the tappets it did go quite for 30 seconds. But started agian. Could the oil pump not be pumping properly?

Cheers

Gaz

Forget what everyone tells you. This engine does this its piston slap, you will notice the noise changes slightly when you vary the load. Mine did that all the time, from 34,000 miles up til when I sold it. Its just the piston skirt flapping on the cylinder wall and will not cause you any problems.

Your plugs show that the engine is in great shape! Your cracked insulator is nothing to worry about, provided it doesn't keep happening. Its often due to the way they were treated *before* they were put in. Also its advisable to find out what happened to the bit wot fell off.... But its most likely it just got blown out staright away.

My mum has a 1.0L though, and its never done it, still doesn't the question in that case is why doesn't it when all the others do!!!! (In other words, I sometimes worry that it doesn't)

[GreenMachine]

Never heard of what he said above but

Polo engines tend to make alot of noise generally anyway

Also sounds like there running out of oil but after owning about 10 I have come to love the noise

Best thing buy a G40 so you can't here it over the charger lol