Fox Burning oil... Does my theory make sense?

79 Fox

Active Member

May 21, 2019

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A van down by the river

Jun 6, 2019

#1

• Jun 6, 2019

• #1

Recently built a 302 for my Fox. Completely rebuilt. First time we fired it up, no oil was burning. When we hooked up exhaust, it started to profusely burn oil from the tailpipes. I think that the exhaust (which is brand new) is the culprit. Would there be oil left inside the exhaust system from manufacturing? Or are the band clamps (which I'm pretty sure have rubber on them somewhere) causing some issues? Please help!

 

KZGUNS

I can swing up to 11”

5 Year Member

Jul 23, 2018

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chardon, Ohio

Jun 6, 2019

#2

• Jun 6, 2019

• #2

79 Fox said:

Recently built a 302 for my Fox. Completely rebuilt. First time we fired it up, no oil was burning. When we hooked up exhaust, it started to profusely burn oil from the tailpipes. I think that the exhaust (which is brand new) is the culprit. Would there be oil left inside the exhaust system from manufacturing? Or are the band clamps (which I'm pretty sure have rubber on them somewhere) causing some issues? Please help!

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did it stop after warm up? if theres oil in the exhaust it wont be for long. have you pulled any plugs to see if they're oil fouled? Theres a lot of places the oil can come from. valve seals, did you stagger the ring gaps? how long has it been run? rings seated? theres lots of places it could come from.

 

79 Fox

Active Member

May 21, 2019

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A van down by the river

Jun 6, 2019

#3

• Jun 6, 2019

• #3

Thanks for the help! It kept smoking for about 30 seconds after shut off. Haven't pulled plugs. (at summer school right now, cant get to the car for a few hours. The car has run for less than 3 minutes in total. Rings should be properly seated, they are staggered

 

KZGUNS

I can swing up to 11”

5 Year Member

Jul 23, 2018

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chardon, Ohio

Jun 6, 2019

#4

• Jun 6, 2019

• #4

Ok. Run it till it’s fully warm and see where you’re at. Could just be residual burning off

 

79 Fox

Active Member

May 21, 2019

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A van down by the river

Jun 6, 2019

#5

• Jun 6, 2019

• #5

And I havent adjusted timing or carb...

 

79 Fox

Active Member

May 21, 2019

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A van down by the river

Jun 6, 2019

#6

• Jun 6, 2019

• #6

I'll be pulling a plug when I get home. I'll have results soon enough.

 

General karthief

wonder how much it would cost to ship you a pair

Mod Dude

Aug 25, 2016

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polk county florida

Jun 6, 2019

#7

• Jun 6, 2019

• #7

You may be over reacting.

 

Wayne Waldrep

Before I post a pic, do you have one of yours?

20+ Year Stangneter

Apr 14, 2003

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Cuba, AL

Jun 6, 2019

#8

• Jun 6, 2019

• #8

I agree on the over reacting. Everything I ever put back together has an initial burn off. It's just part of the process. If it doesn't stop, then worry about it.

 

79 Fox

Active Member

May 21, 2019

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A van down by the river

Jun 7, 2019

#9

• Jun 7, 2019

• #9

Ok. We do have another issue though. We drove it down the block, and it started smoking under the hood profusely. We had repainted the block. I asked my dad if he thought that it could be the fresh paint baking off, and he said no.
We have a couple more big problems. When in park or drive, the car rolls freely as if it was in neutral. When under power, it feels about as fast as my mom's subaru outback... When my dad put the new torque converter in, he pulled it and the trans to the block using the bolts, because he can't read instructions. We both believe that something is seriously screwed up with the trans

 

90sickfox

Wasn't a pretty sight...and I've got big hands

SN Certified Technician

Mar 2, 2015

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Jun 7, 2019

#10

• Jun 7, 2019

• #10

In drive the car will roll...they all will however....the parking pawl isn't engaging. On an AOD not sure if you can get to it in the pan or not. Could be a linkage adjustment too. The shifter may say park...but the transmission lever may not be in park.