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(Post Link) post #1 of 23 Old 08-08-16 Thread Starter
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Fear of running the motor

Back again guys, possibly due to my own demise. I have a noise problem and I'm fearful what it is. The motor has been running great since the head rebuild earlier this year.

It may be just a coincidence, but a few days ago I drove down a road that tidal floods a few inches twice a day. The section that floods is about 20-30 meters. Went through at a steady 10-15mph. Car went through without any issues. Another 20-30meters after exiting the flood as I accelerated away, there was a small hiccup, but nothing that concerned me and as I kept accelerating the engine ran normal all the way home.

The next day, I got into the car, and when starting, it was a little rough. I then drove about 2miles and when it is sitting on idle I could hear a different/extra note from the engine. The rev needle wobbles very slightly, nothing I wouldn't expect from a diesel. I investigated today and the noise sounds like it could be low down inside, when revved it seems to disappear. I jacked the car up and closest I could get to where I think the noise is coming from is the oil sump but I can't be 100%.

My fear which u may be thinking, is the possibility some water got sucked up the air filter (in the 159 this is positioned low down in the front bumper) into the engine causing damage to Pistons, conrod, bearings etc.

I may be over dramatising, but I drive this car every day with a fear of what noises I may hear as there has been a dozen noises Iv delt with since Iv owned it that haven't lead to anything good.

What I need to know, If a small amount of water has entered the engine what damage could be done? Can it survive without a major repair? Car drives fine and noise seems to disappear when driving which confuses me as what Iv read online states that conrod damage when revs increased would get louder. What do I need to do next as I'm stumped with what to do and I'm fearful running the motor with this small noise is only causing more damage? Most information online talks about hydrolock which clearly isn't the case.
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Is the air filter waterlogged?

Check the oil by draining it to see if there any water in it.
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First thing is drop the air box out and check if its wet inside...or even the inlet hose to check for water.
One of the reasons why I take the trouble to take the front bumper off.
Not only can I deal with any potential corrosion issues easily but also make sure the air inlet is water tight and only takes air from the nozzle high behind the grill
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Is the air filter waterlogged?

Check the oil by draining it to see if there any water in it.
The oil is fairly new, can I drop oil and reuse it? Wana keep cost down diagnosing this as much as possible.

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First thing is drop the air box out and check if its wet inside...or even the inlet hose to check for water.
One of the reasons why I take the trouble to take the front bumper off.
Not only can I deal with any potential corrosion issues easily but also make sure the air inlet is water tight and only takes air from the nozzle high behind the grill
If the air box has water inside or the filter is waterlogged can it just be dried or does it require a replacement?
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The oil is fairly new, can I drop oil and reuse it? Wana keep cost down diagnosing this as much as possible.



If the air box has water inside or the filter is waterlogged can it just be dried or does it require a replacement?
Really?? You're concerned about a ruined engine and you're hesitating over a few litres of oil and a filter?
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I would also check air filter first.
Airfilter case it equipped with small hole any water could drain. This hole is jammed often though.
It depend how much water it has been sucked in if any.
My view engine would stop one moment fed water up with. There exist a special name for this either - hydro shock. If engine runs perfect apart of idling there are no direct relation in it.
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I would also check air filter first.
Airfilter case it equipped with small hole any water could drain. This hole is jammed often though.
It depend how much water it has been sucked in if any.
My view engine would stop one moment fed water up with. There exist a special name for this either - hydro shock. If engine runs perfect apart of idling there are no direct relation in it.
I'd agree with this. A small amount of water would just go through (as steam ). You know if an engine hydrolocks. I would suspect some electrical bits got a little damp.
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Air Filter if OEM will be junk once wet as it is a aper base.
Air Box can be dried out. A quick quick on the inlet hose will confirm water.
You might be lucky the issue might be unrelated and/or minor.
I am fairly sure you would know if the engine was hydro-locked - it is quite final
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Originally Posted by Resolution View Post
The oil is fairly new, can I drop oil and reuse it? Wana keep cost down diagnosing this as much as possible.



If the air box has water inside or the filter is waterlogged can it just be dried or does it require a replacement?
Don't see why you can't reuse the oil if it's ok. Drain it, let it stand and the water, if present, will obviously seperate.

If you're on a tight budget the damp filter will dry out, it is paper as pointed out, but they are sturdy.
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Really?? You're concerned about a ruined engine and you're hesitating over a few litres of oil and a filter?
Yes, really!! Doesn't take long for an insult to appear. It may seem ridiculous to some with petty quibbles about paying 50 to replace the oil. But when someone is long term redundant, one income, no other income assistance, mortgaged, three kids, and a car that been owned a year and paid over 2500 on repair bills with the fear another problem has developed which is joining a list of 2-3 other issues. Then that's when you get someone who throws out ridiculous comments.

For all those who have actually helped, thank you. I will check the air filter and box today, and if there is any sign it's damp I will replace it.
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I forgot to mention. The under tray of the engine was not present at the time of driving through the flood. Some may say, why on earth did I risk driving through a flood also. There are two roads to my property the direction I was traveling and the other road had an accident so this was a diversion everyone was taking.
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Wouldn't have thought the undertray being fitted would have made a difference.

Driving more carefully would especially knowing the stupid placement of the air intake

Hope it works out for you.
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Air filter could also be dried at sunshine...
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Wouldn't have thought the undertray being fitted would have made a difference.

Driving more carefully would especially knowing the stupid placement of the air intake

Hope it works out for you.
Indeed a ridiculously placed air filter. I'm sure they could have rearranged things for better placement. I'm **** scared of taking it any where near water. The current photo challenge thread wants a picture of it near a swimming pool. Who do they think I am
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If you have driven into water and damaged your engine, as far as your insurance company is concerned it isn't any different to driving into a wall and damaging the bumper. If you're fully comp you could get insurance to deal with the repair (or they will write the car off).

If you've sucked in a bit of water it might have bent a conrod ever so slightly, it wouldn't be easy to identify this without stripping the engine down. You could do a compression test, but it might not show anything if the bend is only slight. It would be my first port of call though after making sure there isn't any water still in the air intake system and the air filter has been changed.

One of my customers managed to hydrolock his Twinspark on the same day my workshop was flooded last December, after removing the spark plugs and drying the engine out it fired up and he used it for 3 or 4 months but it never sounded right, and then one day without any warning it threw a conrod through the side of the block. We replaced the engine for him last week, a 2.0 TS to replace his previous 1.8.

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Originally Posted by Resolution View Post
Yes, really!! Doesn't take long for an insult to appear. It may seem ridiculous to some with petty quibbles about paying 50 to replace the oil. But when someone is long term redundant, one income, no other income assistance, mortgaged, three kids, and a car that been owned a year and paid over 2500 on repair bills with the fear another problem has developed which is joining a list of 2-3 other issues. Then that's when you get someone who throws out ridiculous comments.

For all those who have actually helped, thank you. I will check the air filter and box today, and if there is any sign it's damp I will replace it.
Didn't mean to sound like an ass but I obviously did and I apologize. I guess that I just wanted to make the point that it would be better to spend 50 to 100 euro as opposed to losing an engine which would be a far higher financial hardship to bear. My apologies once again.
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If you've sucked in a bit of water it might have bent a conrod ever so slightly, it wouldn't be easy to identify this without stripping the engine down. You could do a compression test, but it might not show anything if the bend is only slight. It would be my first port of call though after making sure there isn't any water still in the air intake system and the air filter has been changed.

One of my customers managed to hydrolock his Twinspark on the same day my workshop was flooded last December, after removing the spark plugs and drying the engine out it fired up and he used it for 3 or 4 months but it never sounded right, and then one day without any warning it threw a conrod through the side of the block. We replaced the engine for him last week, a 2.0 TS to replace his previous 1.8.
Interesting. I didn't know that. Delayed Hydrolock. The airbox being so low is obviously a stupid design on the 159/Brera. I did not think it was that low on the 916. It's not on top but I thought it higher up than the pesky 159.
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My customer did lock his engine up properly - it stalled in the puddle and he was dragged out, it wouldn't even turn on the starter. He got it recovered to a non-flooded garage who took the plugs out and changed the oil/filter and put it back together for him whereupon it ran but didn't quite sound right. At that point there was probably very little he could have done about it anyway other than to strip the engine down and get all the components checked.
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Didn't mean to sound like an ass but I obviously did and I apologize. I guess that I just wanted to make the point that it would be better to spend 50 to 100 euro as opposed to losing an engine which would be a far higher financial hardship to bear. My apologies once again.

Thanks for apology. I can totally understand the original comment. Unfortunately I'm in difficult circumstances and this car has given me equal amount of stress as well as joy. And I love this car a lot which will tell how much of a headache it's been. But I'm a much more educated car fan and miles more mechically able capable. So can't be that bad I guess.

Update on the car. Noise disappeared after a few days. I believe a slightly soggy air filter and a few possible soggy electrical connection could have been to blame. Not a great diagnoses I'm afraid, more of a guess. All that matters is it's driving fine. With my history with this car, I'm paranoid with every noise it produces, even the tiniest of farts can send my heart rate where it shouldn't be. I'm pleased to say I'm back to enjoying 3rd gear again.
Thanks for all participants input. Awesome as usual.
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Richard Hammond didn't have that much of a problem with Oliver in Africa, you should be ok
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I'm paranoid with every noise it produces, even the tiniest of farts can send my heart rate where it shouldn't be.
That's exactly the reason I got rid of my 159, even after power flexing the front suspension to stop the creaks and groans I had to then put up with the incessant squeaking from that "improvement"

The rest of the car was brilliant.

Glad you got sorted my friend without having to shell out more cash, I read you and your mates thread with interest, one of the best I've followed
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That's exactly the reason I got rid of my 159, even after power flexing the front suspension to stop the creaks and groans I had to then put up with the incessant squeaking from that "improvement"

The rest of the car was brilliant.

Glad you got sorted my friend without having to shell out more cash, I read you and your mates thread with interest, one of the best I've followed
I always felt like that with my GT. The one thing this 159 does not do is creak apart from some mornings when I go over the first speed bump.
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159s only seem to wear out at half the rate of 156/147/GTs. But when they do wear out, they cost a hell of a lot more to fix.
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