Author Topic: 92 passat diesel (Read 5051 times)

holoffs · « **on:** January 03, 2009, 04:26:30 pm »

I just picked upa 92 passat with a 2 litre gas motor and 5 speed. In my shop I have a 1.6 diesel and transaxle from an 87 jetta that I'm thinking of dropping in. Will this motor and trans drop in or will the diesel bolt up to the passat trans (as long as the final drive is good for highway cruising I'm fine with this) If not, can the hydraulic/cable clutch/linkage be converted to the older style mechanical/cable linkage on the 1.6v transaxle? What about drive axle diameters etc? Sorry about all the questions but I'm hoping to sort out the issues before starting to tear things apart.
Thanks for any info.

Smokey Eddy · « **Reply #1 on:** January 03, 2009, 04:47:22 pm »

Don't apologize for asking questions! that's a big part of this forum!
Speaking of which, sorry i can't answer them! :oops:

cyrus #1 · « **Reply #2 on:** January 03, 2009, 10:26:51 pm »

Easiest will most likely be bolting the diesel to the passat trans. It should work just fine but you will need to find the correct flywheel/pressure plate combination.

TurboJ · « **Reply #3 on:** January 04, 2009, 07:34:23 am »

Quote from: "cyrus #1"

Easiest will most likely be bolting the diesel to the passat trans. It should work just fine but you will need to find the correct flywheel/pressure plate combination.

Right. You should stick with the Passat gearbox since otherways you would need different driveshafts too - and the Passat gearbox is much tougher than the Golf / Jetta one. As for the clutch assembly, you can use a TDI or G60 clutch for example.

MJF · « **Reply #4 on:** January 04, 2009, 09:21:35 am »

2,0 gasser Passat has already 228mm clutch.

TurboJ · « **Reply #5 on:** January 04, 2009, 10:13:10 am »

Quote from: "MJF"

2,0 gasser Passat has already 228mm clutch.

And the flywheel will bolt right onto the 1.6 crank?

MJF · « **Reply #6 on:** January 04, 2009, 10:20:28 am »

Quote from: "TurboJ"

Quote from: "MJF"
2,0 gasser Passat has already 228mm clutch.

And the flywheel will bolt right onto the 1.6 crank?

Any 4cyl will bolt right on. 2,0 fw is same as G60.

vanagonturbo · « **Reply #7 on:** January 04, 2009, 03:25:26 pm »

yup. keep the original tranny and clutch setup (obviously buy a new clutch kit) and bolt the diesel into the passat.

Be warned, you are seriously downgrading the power on that car and it will be extremely slow. Passats are heavy.

TurboJ · « **Reply #8 on:** January 04, 2009, 04:26:35 pm »

On the other hand, it's extremely easy to make the TD produce more power than the stock gas engine..

vanagonturbo · « **Reply #9 on:** January 04, 2009, 04:29:02 pm »

Easy maybe, cheap not really. It takes money to get a TD to produce more than 136hp.

i was assuming the OP was referring to an N/A diesel as it was not specified.

cyrus #1 · « **Reply #10 on:** January 04, 2009, 04:29:30 pm »

And it will still get better fuel economy while doing it!

burn_your_money · « **Reply #11 on:** January 04, 2009, 04:36:06 pm »

16v's are high revers. Check the gear ratio out on it before deciding anything. Since you are under-powering the car, a higher revving transmission may work to your benefit to some extent.

You could convert the passat to the older style 020 transmission, but I don't think it's worth the hassle. Finding a good 02a diesel transmission is also an option.

voodoo · « **Reply #12 on:** January 04, 2009, 04:40:19 pm »

the passat has the 16v/tdi/g60 flywheel

the pressure plate has the same bolt pattern for both vr6 and g60 flywheels

4 cylinder and 6 cylinder friction disks have different part numbers

this is just an example and an information source I suggest to shop around for best price and to compare part numbers

the total cost from most vendors is about $150 for those 2 parts.

the final drive on the passat transmission is fine for freeway cruising

02a ayk = .837 5th x 3.684 ring pinion = 3.08:1 final drive

02a agc = .795 5th x 3.94 ring pinion = 3.13:1 final drive

find the code on the transmission on the flat spot on top of the transmission just left of the shift tower

be sure to remove the catalytic converter from the passat if you go diesel

the 16valve engine from your passat is desirable and rare you can sell it on vwvortex.com or craigslist.com to pay for the clutch

my opinion is one sided, I will never buy another gas car as long as I live.

vanagonturbo · « **Reply #13 on:** January 04, 2009, 04:45:12 pm »

Voodoo is correct. Although, finding a diesel 02a might be something to keep an eye out for. Teh ratios are more desirable. But if its NA and you plan to drive it around town it should be fine. I dont think I could deal with the RPM limit that would be imposed if I put an NA diesel in my Passat. I guess it probably wouldnt matter too much as I dont think it would make it to 70MPH lol!

People will pay a decent price for a 2.0l 16v with all the wiring. the last one I sold went for $900.

Oh and dont buy stuff from MJM, they suck. :p

holoffs · « **Reply #14 on:** January 04, 2009, 05:09:02 pm »

Thanks for the info. I'll check the final drive on the Passat and also look into wheel/tire diameters and compare them to the trans/tire size combo in my 87 Jetta diesel. I will be using the car for a lot of highway driving and suspect a final drive over 3:00 will be too revy for what I want. would it be possible/realistic to change the final drive in the Passat trans to something in the 2:60 range?