Taping/Knocking Noise! Foreign Objects in Oil Pump!

[iceviolet 0]

Hello,

Im new to this forum and the corrado scene, would just like some help on my vr6. Its a late 94, ice grey violet with 126,000 miles, totally standard. Loving the car just not loving the noises its making!

Ive had my vr6 since march now and its got a knocking/tapping noise and i cant figure out what it is! I first thought tappets so changed all those. No difference. I then read a topic on here about big end bearings which sounded on the money, just what i was experiencing. So i changed those, still no difference. While i was doing the bearings i decided to whip off the oil pump and give it a check over. When doing this i found part of a tensioner pad and some other bits, does anyone know what these are? There was a few more smaller bits too.

What else could be making the noise apart from the chains? obviously i need to get them done but it doesnt sound like chain rattle, more a tap that that gets quieter slighty but never goes away? could the coilpack make a tapping/knocking noise if it was faulty? its just that i put some new leads on and im sure it quietened it down a for a short time. Maybe it was just me.

Ive added a sound clip of the noise. Any input would appreciated, cheers, sam

[steve @ 0]

Yeah top of the tensioner pad and the two rivets by the looks of things. I would remove the top chain cover and inspect the pad, chains and guides asap!

[iceviolet 0]

Yes, im wanting to get the chains and guides done, dont really have the space and time to do it myself at the moment. Does anyone know of any decent places to get these done?? close to west yorkshire as possible?? and how long would it be off road for??

[boost monkey 0]

tbh, if those bits have gone through your oil pump I'd recommend a new pump too. It's like the heart of the engine, don't really wanna skimp on it!

[iceviolet 0]

The bits hadnt gone through the oil pump, they were stuck to the gauze entering the pump, i stripped the pump down and measured it up and checked clearance and backlash and all was well within tolerance.

[boost monkey 0]

Your pump was blocked and it still drove ok? That sucks!

 

My 16v pump got blocked for like a split second, and the crank munched through the bearings :brickwall:

 

And what is backlash? :scratch:

 

Ta! :clap:

[iceviolet 0]

Backlash is just the play on the spindle before it actually engages the cog. Yes it was running fine, apart from the tapping noise, must of caught it just in time then as my crank was fine when i took the big ends off, the shells were fine too, didnt look like they even needed doing:

So does anybody know anywhere around west yorkshire area for doing timing chains?? or will i have to travel to somewhere like stealth??

[Kevin Bacon 5]

I thought the same as you Boost Monkey. The post does read as if those pieces were found in the oil pump! Which is impossible as it has a strainer gauze on it.

 

Anyway, any garage can do the chains, it's just a matter of trust if they haven't done them before. Why not print off the wiki guide and take it to your local place along with the requisite parts?

 

As for the tapping. I had the exact same problem - a mysterious clatter / tap that wouldn't go away, no matter what part was replaced.....except the serpentine belt that is.

 

Yep, believe it or not, what I thought was dead tappets was in fact the serp' belt!!

 

Stuck a new one on and the engine is now the quietest it's ever been....

[iceviolet 0]

ok, i might do that with the print out, its a good idea. Really? the belt itself? i changed the tensioner pulley bearing, but didnt put a new belt on as it looked fine. Might give it a try though. Would it be worthwhile doing the water pump too?? I have a receipt saying it was changed at 80,000 at VW.

[fla 9]

tbh, i no longer trust the dealers and receipts only show that the owner has paid for certain things to be done. If they've been carried out by the owner (eg from individual receipts) then there is a greater likelihood that its been done. Take the pump out, have a look and see if it seems ok, change the oring as a minimum and see how you get on. Having said that its only about £20 so not too pricey.

[Kevin Bacon 5]

The chains are easy to do, especially when following 2CC's excellent guide. It's just the aggro of removing the gearbox etc etc....

 

Yep. I changed tappets a few times (aswell as cams at the same time) and the tapping always remained.

 

One day I just happened to run the engine for a short spell with no belt on it and it was silent!! Dug a spare belt out of the shed and it's remained quiet for months now, so it can only have been the belt.

 

Incidentally, the belt that was noisy was a pattern Bosch one. The one that is quiet is a genuine VW one made by Continental.

 

May not be the cause of your problem, but worth a try.

 

On the water pump, that will also become apparent if you run the engine with no belt, but they're cheap to replace, so a good "Whilst you're down there" excercise....

[iceviolet 0]

Yes ive been reading the quide, seems quite simple to do its just the space and time i dont have to do it myself. If i could do it in a day i would have a go myself. Ive only got a small driveway and a garage half full of crap, cant get the car in, so cant just shut the garage door and carry on tomorrow.

Think ill change the belt and pump just as a matter of course, eliminate two more items!!!!!

[fla 9]

The chains are easy to do, especially when following 2CC's excellent guide. It's just the aggro of removing the gearbox etc etc....

 

Yep. I changed tappets a few times (aswell as cams at the same time) and the tapping always remained.

 

One day I just happened to run the engine for a short spell with no belt on it and it was silent!! Dug a spare belt out of the shed and it's remained quiet for months now, so it can only have been the belt.

 

Incidentally, the belt that was noisy was a pattern Bosch one. The one that is quiet is a genuine VW one made by Continental.

 

May not be the cause of your problem, but worth a try.

 

On the water pump, that will also become apparent if you run the engine with no belt, but they're cheap to replace, so a good "Whilst you're down there" excercise....

 

Kev? Can you use a belt dressing on noisy belts? I used it on a squeeky one on the Yaris and it worked a treat, not sure about the C though?

[Kevin Bacon 5]

You can but it didn't work on this belt.

 

Vince has seen this before aswell, although it's very rare.

[iceviolet 0]

Took the car to my local garage and the guy couldnt be anymore un-helpfull!! Said he wouldnt take the job on of doing the chains and said he didnt know anyone in the area who would. Said it was a ball ache of a job and he could make 3 tinmes more money doing smaller jobs! Looks like i might have to try tackle it myself!

[Kevin Bacon 5]

Another typical lazy arse mechanic who can't be bothered to take the gearbox off.

 

Or more likely, he doesn't trust himself to be able to time it up properly again afterwards!

 

Well if he can afford to turn business away like that, then I'm in the wrong business!!

[iceviolet 0]

Thats what i was thinking! must be a gap in the market!

[Critical_Mass 10]

Took the car to my local garage and the guy couldnt be anymore un-helpfull!! Said he wouldnt take the job on of doing the chains and said he didnt know anyone in the area who would. Said it was a ball ache of a job and he could make 3 tinmes more money doing smaller jobs! Looks like i might have to try tackle it myself!

 

Where in West Yorkshire are you?

[iceviolet 0]

I live in Batley/Birstall

[Critical_Mass 10]

I live in Batley/Birstall

 

Was gonna say i go up to a VW specialist in Castleford if its not too far for you. Good mechanic and trusted. Let us know if you need details.

[iceviolet 0]

I live in Batley/Birstall

 

Was gonna say i go up to a VW specialist in Castleford if its not too far for you. Good mechanic and trusted. Let us know if you need details.

 

yeah would be good if you could give me some details. cheers

[iceviolet 0]

Thanks a lot for that info on that garage. Ill try have a drive over sometime this week!

[Critical_Mass 10]

Thanks a lot for that info on that garage. Ill try have a drive over sometime this week!

 

 

heh, theres a problem with doing that, only found out yesterday he's off to the le mans 24hr and will be away for 2 weeks. Apologies. Though he's still worth a try when he gets back. He charges about £26 per hour.

[iceviolet 0]

Ok, no worries

[iceviolet 0]

hello,

Changed the serpentine belt and i think it has made it slightly quieter. The old belt was actually a bit stiff compared to the new one. So just the chains and tensioners to do now, not much else left to change that would make a noise! Think im going to wait a few weeks to get them done, not using the car much at the minute as i have a work van to drive aswell. Plus this weekend im going to change the front wheel bearings, Ive had a kind of droning noise ever since i got the car, sounded like it was coming from the rear, changed both rear bearings, discs and pads and the noise was still there. Locating noises is quite deceiving sometimes. I noticed that when i steer to the left slightly the noise gets slightly louder??? its not a loud noise just a droning. Any know what this could be??

Ive got 2 new wheel bearing kits, 2 hubs, 2 ball joints and 2 top mount kits to put on at the same time. Would anyone suggest anything else to change while i was in there?? I was thinking about replacing the tie rod ends and ARB links but then thought they would cause any noises like that would they??