Author Topic: oil in exhaust on rebuilt 1.6na  (Read 14655 times)

Reply #15February 22, 2025, 12:35:24 pm

oblique

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Re: oil in exhaust on rebuilt 1.6na
« Reply #15 on: February 22, 2025, 12:35:24 pm »
ok so warm comp test was 460-460-470-480

BUT...in the process I noticed a leaky injector....taking it out revealed fuel in the bore as well...turns out the nozzle wasnt seated flat as there was corrosion on the inside of the injector body that the nozzle sits in.

Idles better for sure, we will see how it starts up cold.

The return line is rubber but the supply is the translucent blue one that McMaster-Carr sells. no bubbles in there.
Humbly rolling coal.
90 1.6TD Jetta
79 1.6Na Rabbit

Reply #16February 22, 2025, 04:41:09 pm

fatmobile

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Re: oil in exhaust on rebuilt 1.6na
« Reply #16 on: February 22, 2025, 04:41:09 pm »
 I took an old heat shield, cut an emory cloth disc over it,
and a small, long bolt through it.
 It's used to clean up the area where the heat shield sits.
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
MK4s: 2000 TDI jetta, 2003 TDI wagon, 2000 golf 2.0 gasser.
'84 Rabbit with 1.7TD KY block pistons bored to 80mm, VNT-15
'84 GTI with stock 1.6TD starion intercooler.

Reply #17February 22, 2025, 04:55:20 pm

oblique

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Re: oil in exhaust on rebuilt 1.6na
« Reply #17 on: February 22, 2025, 04:55:20 pm »
the issue was the injector itself...the nozzle wasnt seated parallel to the body...there was built up corrosion in the bottom half of the injector body that was preventing it from sitting straight in the injector body...so wasnt sealing against heatshield OR injector internals.
Humbly rolling coal.
90 1.6TD Jetta
79 1.6Na Rabbit

Reply #18February 22, 2025, 05:41:51 pm

ORCoaster

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Re: oil in exhaust on rebuilt 1.6na
« Reply #18 on: February 22, 2025, 05:41:51 pm »
See doing a comp test on it solved all your worldly problems.  Just like I thought.    Ahem, ahem.

Nice to find those never knew that before things on the car as you wrench on it.  Definitely a great find.  Hope all is well now.  MPG should go up as well as smoothed out idle speed.


Reply #19March 04, 2025, 06:19:38 pm

oblique

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Re: oil in exhaust on rebuilt 1.6na
« Reply #19 on: March 04, 2025, 06:19:38 pm »
The saga continues...

Turns out I was running full synthetic the whole time....Mopar Diesel DPF 10902 is full despite no mention on the labels. Switched to T4, now my exhaust smells like cats a$$hole.

I get hesitation at low throttle position. Coasting in town the car will start to bog down and lurch forward and back, I have to give it juice to get over it but then my 1.6 powerplant takes over and puts me back in my seat..since my floor and seat support bridge is gone I go WAY back.

Cold start issues persist.

Going to give it some more miles with the other oil but it doesnt explain everything, I dont think.
« Last Edit: March 05, 2025, 11:07:39 am by oblique »
Humbly rolling coal.
90 1.6TD Jetta
79 1.6Na Rabbit

Reply #20March 05, 2025, 07:08:55 pm

fatmobile

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Re: oil in exhaust on rebuilt 1.6na
« Reply #20 on: March 05, 2025, 07:08:55 pm »
I'd try advancing it more than .97
Tornado red, '91 Golf 4 door, with M-TDI 12mm pump, south bend clutch, VNT-15 turbo, 02A trany
MK4s: 2000 TDI jetta, 2003 TDI wagon, 2000 golf 2.0 gasser.
'84 Rabbit with 1.7TD KY block pistons bored to 80mm, VNT-15
'84 GTI with stock 1.6TD starion intercooler.

Reply #21March 11, 2025, 01:39:19 am

chi1337

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Re: oil in exhaust on rebuilt 1.6na
« Reply #21 on: March 11, 2025, 01:39:19 am »
that lurching sounds like fuel pump issues;
- air in the fuel lines
- give it some more fuel (fuel screw), 1/4 turn
« Last Edit: March 11, 2025, 01:40:51 am by chi1337 »

Reply #22March 12, 2025, 12:22:04 pm

oblique

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Re: oil in exhaust on rebuilt 1.6na
« Reply #22 on: March 12, 2025, 12:22:04 pm »
What typically causes white smoke on a warm motor without the advance pulled? I get a fair amount even on medium accel. Am I still dealing with timing or do I have injector issues...I rebuilt and set them up properly but with used nozzles that I cleaned and polished.

Haven't adjusted anything yet.
Humbly rolling coal.
90 1.6TD Jetta
79 1.6Na Rabbit

Reply #23March 12, 2025, 07:44:40 pm

ORCoaster

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Re: oil in exhaust on rebuilt 1.6na
« Reply #23 on: March 12, 2025, 07:44:40 pm »
White smoke is either bad timing, or a leak in the cooling system as far as I know.  Bump that timing up to 1.0 - 1.05 and see if it goes away.