What is wrong with my engine?

RamboRage

Bought an mk4 golf in june with 80k miles and the engine seems to be acting up. Took it to a mechanic and he told me that the oil pump is breaking and that id need an entire new engine which is already sending shivers down my spine,.

Another mechanic said it could be the oil pressure sensor but I already replaced it and its still the same, I was getting the low oil pressure light for a few days and the mechanic replaced a fan switch for the coolant, and somehow the oil pressure light went away after that, which sounds odd because I dont know what that would have to do with oil pressure. Maybe I am wrong (I'm an IT nerd I know very little about cars)

I also found a blue fuse in the floor of my car. Something has me paranoid that the mechanic took a fuse out so I don't get any low oil pressure alerts. Don't trust any of these dodgy car mechanics at all. Does anyone have any advice on what I should do? I really don't feel like replacing an engine as I am still in education just about making ends meat. Also heres a video of what the sounds are like after I drive around for like a half hour.
have to break up the links abit because im blocked from posting them till i hit 50 posts wtf
http s://www .youtube. com/watch?v= xj7ckGU09uU


also recently this thing keeps making a dodgy noise now aswell and it also has a mad vibration to it when i hold my finger on it. Sounds like something bubbling in a frying pan.
http s://i.gyazo. com/cb4e29b48bcd64679abcdfb5651d5e75.jpg

All help is really appreciated cheers everyone!

porsche boy

Why is your mechanic dodgy? Because you found a fuse on the floor? Looks to me like he gave you the answer but you don't like it and want someone to say everything will be OK.

Does the oil light come on when you turn the ignition on?

Have the engine tested using a mechanical pressure gauge. That will tell you the oil pressure when the engines running.

_Brian

Why are you going to a mechanic you don't trust ??

Find a good trustworthy mechanic and stick with them.

Special Circumstances

The buzzing is a solenoid valve in your evap canister (the black thing pointed to in you pic).

The solenoid valve pulses under certain conditions to allow your engine to draw in fuel fumes stored in a charcoal canister so they are burned rather than just vented out in the air.

I doubt it is meant to buzz all the time. Whether the valve has gone a bit mad, or it's getting a dodgy signal, or it's being deliberately instructed to pulse more than usual due to a problem somewhere else.... couldn't say. Some ECUs have a selftest/unblock mode for those things which would account for noticeable pulsing but that may or may not be the case here.

RamboRage

porsche boy wrote: »

Looks to me like he gave you the answer but you don't like it and want someone to say everything will be OK.

Does the oil light come on when you turn the ignition on?

Have the engine tested using a mechanical pressure gauge. That will tell you the oil pressure when the engines running.

not really a few people told me hes dodgy and absolutely rips everybody off. Also there's no oil light anymore it hasn't popped up in ages, It only comes on when the ignition is on btw yea

RamboRage

Special Circumstances wrote: »

The buzzing is a solenoid valve in your evap canister (the black thing pointed to in you pic).

The solenoid valve pulses under certain conditions to allow your engine to draw in fuel fumes stored in a charcoal canister so they are burned rather than just vented out in the air.

I doubt it is meant to buzz all the time. Whether the valve has gone a bit mad, or it's getting a dodgy signal, or it's being deliberately instructed to pulse more than usual due to a problem somewhere else.... couldn't say. Some ECUs have a selftest/unblock mode for those things which would account for noticeable pulsing but that may or may not be the case here.

cheers I'll point it out to a car mechanic to sort out, I don't mind paying out a few quid just dont want to have to replace my engine as it costs a ton more than anything else

gavman1

There is nothing you can do to a cooling system that could impact on a oil pressure light.im sure you took the mechanic up wrong on this point.its true the oil pump could be dicky but that would only be fixed by replacement.the other major cause of a low oil pressure light is worn big end or main bearings.usually by the time the light comes on its to late.as said before a oil pressure guage is the only real way to tell if there's a problem.

BorneTobyWilde

https://www.youtube.com/watch?v=xj7ckGU09uU

Only way I could view vid was to post it.

Sounds like sticking valves maybe. Is there actual oil in engine.
Typical VW 1.4 . Not exactly a good engine.

gavman1

BorneTobyWilde wrote: »

https://www.youtube.com/watch?v=xj7ckGU09uU

That sounds like it's knocking it's nuts off lad due to oil starvation.sorry it sounds caput.

marathon

Have a 99mitsubishi pajero jeep 2.5 litre and noticed oil leaking but can't find where it coming from any ideas?

RamboRage

Cheers for linking the video properly also I tested the oil a good few times, comes out golden enough and is at a decent level. Also I was talking to a mechanic today and he said its most likely piston slap and that id need to strip the engine to fix it. Not really worth doing seeing as I paid like €850 for the car. Doesn't look like Id be able to sell it either. Mind you I am tempted to try a few of those special liquids that people are talking about all the time, ones that would help with the oil what do you guys think?

Bigus

RamboRage wrote: »

Cheers for linking the video properly also I tested the oil a good few times, comes out golden enough and is at a decent level. Also I was talking to a mechanic today and he said its most likely piston slap and that id need to strip the engine to fix it. Not really worth doing seeing as I paid like €850 for the car. Doesn't look like Id be able to sell it either. Mind you I am tempted to try a few of those special liquids that people are talking about all the time, ones that would help with the oil what do you guys think?

Noise Normally ispiston slap on those 1.4 golfs , but the video sounds like camshaft worn or a dodgy hydraulic tappet , which would be a handy fix,

however a worry would be the cause, Probably dodgy oil pump or blocked strainer/ filter. I'd start by dropping the sump and clean the strainer , 0 parts cost and about an hours labour , if the strainer is dirty a clean up will help the hydraulic tappet to refill , problem solved .

Special Circumstances

RamboRage wrote: »

cheers I'll point it out to a car mechanic to sort out, I don't mind paying out a few quid just dont want to have to replace my engine as it costs a ton more than anything else

Listening to that video you have much bigger issues!!! Forget about that charcoal canister a while.

gavman1

I don't know how much you understand these things so please forgive me if it seems like I'm talking down to ye.if ye have worn bearings you will still have clean oil if it's fresh and the level won't drop (unless it's leaking out somewhere). The bearings is were the oil builds it's pressure so that it can be squeezed around the engine.when they Ware the pressure drops and you won't get sufficient oil to the top of the engine which kills the camshaft.in more severe cases the oil doesn't stay on the crankshaft bearings were it's supposed to provide a thin layer between the bearing and the shift itself.piston slap has nothing to do with oil pressure as it's due to excessive movement between the actual piston and the cylinder wall.alot of people say it's not terminal but very annoying.my guess based on your previous oil light issues would be bottom end.again check with oil pressure guage to be sure.hope this helps

RamboRage

gavman1 wrote: »

I don't know how much you understand these things so please forgive me if it seems like I'm talking down to ye.if ye have worn bearings you will still have clean oil if it's fresh and the level won't drop (unless it's leaking out somewhere). The bearings is were the oil builds it's pressure so that it can be squeezed around the engine.when they Ware the pressure drops and you won't get sufficient oil to the top of the engine which kills the camshaft.in more severe cases the oil doesn't stay on the crankshaft bearings were it's supposed to provide a thin layer between the bearing and the shift itself.piston slap has nothing to do with oil pressure as it's due to excessive movement between the actual piston and the cylinder wall.alot of people say it's not terminal but very annoying.my guess based on your previous oil light issues would be bottom end.again check with oil pressure guage to be sure.hope this helps

It sounds understandable enough thanks man, I'll get a mechanic to use a pressure guage then and see what he says

RamboRage

Bigus wrote: »

Noise Normally ispiston slap on those 1.4 golfs , but the video sounds like camshaft worn or a dodgy hydraulic tappet , which would be a handy fix,

however a worry would be the cause, Probably dodgy oil pump or blocked strainer/ filter. I'd start by dropping the sump and clean the strainer , 0 parts cost and about an hours labour , if the strainer is dirty a clean up will help the hydraulic tappet to refill , problem solved .

So what would you recommend me using to clean the strainer also what does dropping the sump mean? I feel horrible for not knowing this haha

Bigus

RamboRage wrote: »

So what would you recommend me using to clean the strainer also what does dropping the sump mean? I feel horrible for not knowing this haha

The sump is the whole oil pan on the bottom of the engine block where the oil drain plug is.

In reality this needs to be done on a ramp, cleaning the strainer is simple , access to it is the problem , the only way to do this is drop the sump. The stainer is for all the world like a metal tea strainer which just needs to be unbolted and cleaned of "varnish " and sludge and blockages.

I've seen this solution work successfully in the past on this type of engine.

https://www.youtube.com/watch?v=IOidWGvnqV0

RamboRage

Bigus wrote: »

The sump is the whole oil pan on the bottom of the engine block where the oil drain plug is.

In reality this needs to be done on a ramp, cleaning the strainer is simple , access to it is the problem , the only way to do this is drop the sump. The stainer is for all the world like a metal tea strainer which just needs to be unbolted and cleaned of "varnish " and sludge and blockages.

I've seen this solution work successfully in the past on this type of engine.

https://www.youtube.com/watch?v=IOidWGvnqV0

looks easy enough, will i need to top up all my oil again if I do this? Also I was thinking it could have been the oil that I am currently using, someone told me it might not be heavy enough oil or something.

Esel

RamboRage wrote: »

looks easy enough, will i need to top up all my oil again if I do this? Also I was thinking it could have been the oil that I am currently using, someone told me it might not be heavy enough oil or something.

Not a DIY job for a beginner, imho. The oil can be re-used.

TeaBagMania

Considering you only paid 850 if the oil strainer cleaning doesn t work id sell it for parts and find another vehicle