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oprn
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PostPosted: Tue Nov 15, 2022 11:13 pm    Post subject: 1.8T Reply with quote

I am looking at buying an Audi A4 with a 1.8T engine. Anyone had experience with these? Does VW state in the owner's manual that they require premium fuel?
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TDCTDI
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PostPosted: Wed Nov 16, 2022 7:50 am    Post subject: Re: 1.8T Reply with quote

IMO, the 1.8t (up to 2005) is arguably the best engine that VW has ever made. The biggest issue that it had was “sludging” due to manufacturer suggested 7-10,000 mile oil service intervals, and then the engines not getting the proper synthetic oil put in them (even at the dealer).


The engines ran hot enough internally to “cook” the oil, which built up as carbon on the inside of the block (like cooking oil in a frying pan.). Most of the engine failures were due to this carbon coming off (usually after a quick lube type place upsold an “engine flush”.), and blocking the oil pump pickup screen. This obviously led to oil pressure loss & subsequent failure of the engine and/or turbo.


Past that, most of the other issues (check engine light) were vacuum related.



They do require premium. You can run low grade, but the fuel economy plummets & any $ saved is lost in the difference of mpg.
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PostPosted: Wed Nov 16, 2022 8:47 am    Post subject: Re: 1.8T Reply with quote

I would agree with that assessment. Don't forget to maintain the timing belt. Too early is better than too late.

Come to think of it, too late is not good at all.
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PostPosted: Wed Nov 16, 2022 9:15 am    Post subject: Re: 1.8T Reply with quote

This is a 2007 with 48 K miles so hopefully still ok. I am a 3000 miles/oil change kind of guy, always have been.
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PostPosted: Wed Nov 16, 2022 5:31 pm    Post subject: Re: 1.8T Reply with quote

I have to agree also. If I ever end up with one, the first mod would be an Oil Cooler w/ a thermostatic sandwich plate.
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PostPosted: Wed Nov 16, 2022 5:59 pm    Post subject: Re: 1.8T Reply with quote

The 2.0t FSI engine is horrible, the 09+ 2.0t TSI engine is far worse.


The FSI regularly wiped out camshafts due to driving the high pressure fuel pump with a flat tappet.


The TSI shits timing chains around 70,000 miles, and then the piston rings/pistons start their oil consumption issues starting around 50,000. 1qt oil/1,000 miles is “within spec”.
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PostPosted: Wed Nov 16, 2022 8:26 pm    Post subject: Re: 1.8T Reply with quote

ps2375 wrote:
I have to agree also. If I ever end up with one, the first mod would be an Oil Cooler w/ a thermostatic sandwich plate.

I was thinking about that after reading that they run hot. Is there a source of sandwich plates for those engines that springs to mind?
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Last edited by oprn on Wed Nov 16, 2022 8:37 pm; edited 1 time in total
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PostPosted: Wed Nov 16, 2022 8:32 pm    Post subject: Re: 1.8T Reply with quote

TDCTDI wrote:
The 2.0t FSI engine is horrible, the 09+ 2.0t TSI engine is far worse.


The FSI regularly wiped out camshafts due to driving the high pressure fuel pump with a flat tappet.


The TSI shits timing chains around 70,000 miles, and then the piston rings/pistons start their oil consumption issues starting around 50,000. 1qt oil/1,000 miles is “within spec”.

Interesting! The German car specialist (he only works on VW, Audi, BMW and Porsche) that I have used for years and trust told me that the '06 & '07 2.0L TSI was a good one and recommended it. His sister in law had one that he serviced and it gave her 275,000 trouble free miles before it failed. Maybe different years had different issues?
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PostPosted: Thu Nov 17, 2022 7:09 am    Post subject: Re: 1.8T Reply with quote

The FSI is an extraordinary engine…. When compared to aTSI.


The 1.8t is a far better engine.


I wouldn’t worry about the high internal temps, it helps them run more efficiently. Just keep the proper synthetic oil in it & change it out every 5,000 miles.
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PostPosted: Thu Nov 17, 2022 8:31 am    Post subject: Re: 1.8T Reply with quote

What about the CVT transmission? Any issues with those?
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PostPosted: Thu Nov 17, 2022 8:58 pm    Post subject: Re: 1.8T Reply with quote

oprn wrote:
What about the CVT transmission? Any issues with those?


Don't start that. Popcorn

I'll just say I'm not a fan. Never worked on one and never plan to own one.
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PostPosted: Thu Nov 17, 2022 9:01 pm    Post subject: Re: 1.8T Reply with quote

oprn wrote:
ps2375 wrote:
I have to agree also. If I ever end up with one, the first mod would be an Oil Cooler w/ a thermostatic sandwich plate.

I was thinking about that after reading that they run hot. Is there a source of sandwich plates for those engines that springs to mind?


My current car (MKIII 2.slow) has one from a Volvo, but I'm sure there are plenty of suppliers selling good ones out there in the kits or separate.
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PostPosted: Fri Nov 18, 2022 9:23 am    Post subject: Re: 1.8T Reply with quote

Although CVT's have been out awhile [I believe the Subaru Justy had them first in the USA, mid 80's] they have improved. They are basically a throw away transmission that cannot be rebuilt. Getting a used one is not a good idea because those are probably just as bad as the one you are replacing.

It's one part in the car that will total it real quick.
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PostPosted: Fri Nov 18, 2022 9:25 am    Post subject: Re: 1.8T Reply with quote

As for the oil cooler, I believe the stock V6 coolers are similar but larger. With the right stand pipe, I believe it is a simple swap.

There are two camps about oil cooling. Those that love air and those that love liquid. There is no right way so pick you camp and be happy with it.
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PostPosted: Fri Nov 18, 2022 9:54 am    Post subject: Re: 1.8T Reply with quote

I have both on my car, liquid is good for warming the oil and the air cools the oil. If the liquid coolers were bigger to give more time for heat transfer, I'd be good with that, but for the actual diff in temps between the cooling media and the liquid to be cooled, the amount of time the oil is there just doesn't seem to cool it enough for me.
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PostPosted: Fri Nov 18, 2022 9:59 am    Post subject: Re: 1.8T Reply with quote

Oil temperature is not the problem, the problem is where the oil comes in contact with the walls of the block & cylinder head that causes the oil to burn. This only happens with conventional oil, not the synthetic.


I believe that the CVT transmission was only for front wheel drive models, I gots two of them on the floor, it was cheaper to buy whole wrecked cars than getting an engine for one.
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PostPosted: Fri Nov 18, 2022 3:40 pm    Post subject: Re: 1.8T Reply with quote

ps2375 wrote:
I have both on my car, liquid is good for warming the oil and the air cools the oil. If the liquid coolers were bigger to give more time for heat transfer, I'd be good with that, but for the actual diff in temps between the cooling media and the liquid to be cooled, the amount of time the oil is there just doesn't seem to cool it enough for me.

My thoughts exactly! The liquid to liquid ones are oil heaters for quick warm ups not coolers really. And that's all good but they do very little to cool the oil. Essential really on the diesels because without them the oil would rarely reach proper operating temps.

I will drop a temp probe down the dipstick hole and see what the actual running temps are before changing anything. I have no issue running synthetic, we run it now in our Jetta ALH engine.

I will avoid the CVT like the plague then! We wanted a standard transmission but those are like looking for hen's teeth now! Rolling Eyes I am not disabled or anything... don't need a computer to find the gears for me. Funny thing, the general public is all for grinding their own coffee beans these days but not their own gears... personally I get more joy out of doing the gears. Wink
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PostPosted: Sat Nov 19, 2022 9:25 am    Post subject: Re: 1.8T Reply with quote

Not trying to convince anyone which is better, but if the oil is at 130C and the coolant is 90C, I would suspect the oil to come out cooler. If the oil is at 60C and the coolant is at 90C, then I suspect the oil will come out warmer. Getting the oil at operating temperature sooner does not really have any drawbacks.

As for CVT's, I agree, they only came in 2WD that I know of. Good thing Audi makes a lot of Quattro's.
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PostPosted: Sun Nov 20, 2022 5:57 am    Post subject: Re: 1.8T Reply with quote

Well I missed out on that car. Crying or Very sad

I will see what comes up next and shoot for a 1.8T or a 2.0 FSI then in a Passat wagon or an Audi A4 wagon. Too bad VW never put the standard gearbox in those.
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PostPosted: Mon Dec 05, 2022 11:08 pm    Post subject: Re: 1.8T Reply with quote

I'm fairly certain I've had a 1.8T 5spd passat wagon before.. Idea
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