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Reged: 07/22/04
Posts: 27
A long time since I have posted here
#1296514 - 08/09/06 02:32 AM

I need the help of your membership. I have a '97 GL Bi-Fuel Zetec that runs on natural gas most of the time. Within the last few months I've lost compression on the end cylinders, down to around 30 -> 65 psi. I don't think this is a ring problem as the oil level never goes down as I would expect from wall or ring wear or breakage. The engine has 67K and early in it's life the head was milled to true the surface.
I am suspecting a warped or burnt valve surface and my question is: Is the Bi-Fuel head the same component as the gasoline engine head assembly. From what I researched on they are the same part # but seeing as this is a bit of a rare bird, I'm coming to the well of knowledge to help me confirm this.


Grow up! Quit asking stupid questions! And quit acting like you know it all!!!!

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"Absolut Rara."

Reged: 09/09/00
Posts: 3223
Loc: Westland, MI
Re: A long time since I have posted here new
#1296525 (Re: BradfordScales) 08/09/06 02:39 AM

I don't know for sure on the 2.0L Zetec, but typically the differences between a standard gas head, and a flex-fuel head is the engine valves and seats. The flex-fuel valves and seats tend to be made of a different material to improve wear when using the E85 fuel.

For all practical purposes, you are very likely to be just fine using a standard head in your situation.

Balance is the Key.

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I have no life

Reged: 05/14/02
Posts: 21653
Loc: Albany, Georgia
Re: A long time since I have posted here new
#1296562 (Re: Rara) 08/09/06 03:37 AM

The car he is speaking of does not run e85, it runs cng ... natural gas. So it would be different than a vehicle set up to run e85.

I have never seen any part numbers as far as the cylinder heads and valves go for the bi-fuels, so I expect them to be identical to regular zetecs.

98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)

FS: SVT rear sway bar
WTB: Very cheap beater

CEG Dragon Run - October 13-15

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