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Replaced intake gaskets now runs bad

Tiny
CHERYL RDBERGEN
  • MEMBER
  • 2004 FORD FREESTAR
  • 3.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 192,000 MILES
My brother replaced intake manifold gaskets. After he finished the first set. He started the car and then white smoke and milky oil. He took it apart again and replaced the gaskets a second time. Now the car is hardly idling, no acceleration and stalls out. He had to drain the oil 3 times and flush the coolant. It did not run this bad before this repair.
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Monday, November 18th, 2019 AT 12:46 AM

5 Replies

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Okay, this is definitely a problem with the coolant mixing the engine oil. It is probably being introduced into the combustion chamber through the intake manifold gasket and then pushing some of it past the piston rings and into the engine oil that way. There is a possibility though, that your intake manifold might be compromised by a crack or something of that nature, causing this condition. I would redo the intake manifold gaskets and reinstall the intake manifold. If there is still a problem then I have included a guide on testing the intake manifold in your vehicle in the diagrams down below. Please get back to us with what you are able to find out.

Thanks,
Alex
2CarPros
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Monday, November 18th, 2019 AT 1:26 AM
Tiny
CHERYL RDBERGEN
  • MEMBER
  • 4 POSTS
Okay, the intake gaskets have been replaced again and seated correctly. Have not done a compression check but newest odII codes are: PO174, PO193, PO113, PO401. Going to removing some of theses items now. Any advice? No oil and coolant mixture and been flushed. Clean oil.
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Monday, November 18th, 2019 AT 9:24 AM
Tiny
CHERYL RDBERGEN
  • MEMBER
  • 4 POSTS
  • 2004 FORD FREESTYLE
  • 3.9L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 192,000 MILES
Replaced intake gaskets stated in a previous question. Now have low compression in 2 cylinders. Would this cause the rough idling, stalling? It was not running this bad before this repair. I agreed to the repair because it was leaking.I can barely afford the parts let alone labor. My brother works for food;)
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Monday, November 18th, 2019 AT 11:07 AM (Merged)
Tiny
CHERYL RDBERGEN
  • MEMBER
  • 4 POSTS
So compression check resulted in both cylinder 4 and 5 register ing negative compression. #4 was -42/50 #5 was - 37/42. Is it worth it for me to even fix this problem? I am pretty sure that all in all these cylinders are froze or stuck shall we say.
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Monday, November 18th, 2019 AT 6:39 PM
Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

There Is no way for a vehicle to have negative compression. You might want to rent a compression gauge from your local auto parts store, like AutoZone, which is available for rent for a refundable deposit. Here is a link explaining how to do a compression check below:

https://www.2carpros.com/articles/how-to-test-engine-compression

Please go through this guide and get back to us with what you are able to find out. We can go from there.

Thanks,
Alex
2CarPros
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Monday, November 18th, 2019 AT 10:57 PM

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