The Guide to (U.S.) 1st Gen cylinder heads. | Page 4 | Ford Escort Owners Association (FEOA)

The Guide to (U.S.) 1st Gen cylinder heads.

Discussion in '1st Gen 1981-1990 CVH' started by scortster, Nov 30, 2004.

  1. bzor

    bzor New Member

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    so i've got a 89 lx with a 1.9 efi.. what is a safe bore?? has anyone machined and bored out the intake and exhaust ports before??
  2. UnexplodedCow

    UnexplodedCow FEOA Member

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    Safe bore for the block - 1mm.
    I don't know anyone who's really opened up the intake ports, however, there used to be a thread in the for-sale section about someone porting 2nd and 3rd gen heads, which would be pretty similar (2nd gen) to your CFI engine.
  3. bzor

    bzor New Member

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    alright sounds good! thanks a lot for the help
  4. Sketch

    Sketch You Tube Tuner-vana

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    heads

    bump does anyone have a 90 roller head?
  5. UnexplodedCow

    UnexplodedCow FEOA Member

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    Yup. I have one sitting in my garage. It needs valve guides.
  6. Sketch

    Sketch You Tube Tuner-vana

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    head

    So I have been told that I can not put the roller cam and lifter in my non roller head. Do you know if this is true or not?
  7. Sketch

    Sketch You Tube Tuner-vana

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    no reply hey
  8. Sketch

    Sketch You Tube Tuner-vana

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    well, bump. i found a roller head in the local yard and bought the roller lifters. i put them in my non roller gt head and have been running them for over a year now with no complicationd so i guess that answers that. so exploded how do you know the 1g heads will fit the ztec block/
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  9. CANDCRENTALL

    CANDCRENTALL FEOA Member

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    Thanks for posting this great information. If I had read this first I would have saved myself a bunch or time and I would not be stuck with a brand new engine that I can't use!
  10. John Sawyer

    John Sawyer FEOA Donator

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    This makes me wonder if Sketch was saying that he was running roller lifters with a flat tappet GT cam (he doesn't say that he also got and installed the roller head's cam), but I wonder about the consequences.

    In any case, here are some more data points to add to that:

    I found a head today in an 89 LX in a local yard that has a casting number the same as my 89 Pony's roller head (RFE8EE-A7A). I pulled and bought this LX's head, because a few days ago the oil on the valve train in my Pony started to look like chocolate milk within seconds after I started the engine after a year of work on the car (and I had just done an oil change as the last task, so I know the oil was good before I started the engine), and because I always wanted two heads. I figured a second head might be handy when I pull my original head to investigate the chocolate milk, because I may find that it's badly warped or cracked, which might have happened when I last drove the car last summer, when it experienced two overheating episodes during the hottest day of the year, one bad enough to turn on the Engine light.

    I brought the LX head home, thinking it must be a roller head due to the casting number. It turned out to be a roller head with a flat tappet/lifter cam and flat tappets installed to go with it. Here's a photo showing the flat cam (on the right) next to my CFI head's original roller cam on the left (which I removed in January to replace it with a 1990 GT roller cam)--on the flat cam, notice the steeper lobe sides that result in a sharper nose, typical of a flat tappet cam found in a 1.6L head:

    Flat tappet cam from 89 LX at Rancho Cordova PNP, reduced 2.jpg

    Here's a wider view of the two cams (89 Pony CFI roller cam on left, 89 LX flat tappet cam on right) (notice the other obvious difference: the two crescents in the circumference of the distributor end of the flat tappet cam):
    Flat tappet cam from 89 LX at Rancho Cordova PNP, next to my reman head's original CFI cam.jpg

    I didn't expect to find a flat tappet cam and lifters in an 89 LX's roller head, but apparently it worked for the car's last owner, since it was driven until it had a collision. From everything I've read, a flat tappet cam isn't supposed to work in a roller cam head, and a roller cam isn't supposed to work in a flat tappet head, but this seems to say different, at least for this particular combination. It makes me wonder if this was an odd Ford production anomaly, or whether someone later replaced an original roller cam and its lifters with these flat ones, possibly from an Escort with a 1.6L engine. There's no wear that I can see on the flat cam's journals or the flat bottom of its lifters, and its cam lobes have no cracking/pitting on their polished surfaces as I've seen on a number of junkyard camshafts, so this implies that these flat parts may be newer than this head. Was it repaired or remanufactured by someone who didn't know Ford made this head for a roller cam and lifters, or who thought (maybe from experience?) that a flat cam and lifters would actually work fine in a roller cam head, or at least this particular roller head casting?

    I wondered if the diameter of the bearing journals on the flat tappet cam was different from my CFI roller cam, or my GT roller cam, so I took some measurements with a digital caliper. Here are the dimensions I measured on all three cams, and on the tappets that each cam came with (the range in my measurements reflects variations in my digital caliper as I repeated measurements, not actual dimension differences I measured):

    Bearing journal diameter, all three cams: 45.7-45.9mm (Ford spec: 45.7625-45.7375mm)

    Tappet/lifter diameter, all three cams: 22.22mm (Ford spec: 22.212-22.200mm)

    Lobes:
    89 LX head's flat tappet cam (today's junkyard discovery):
    Nose to base: 38.3mm-38.4mm
    Base to base (from each side of base): 32.3mm-32.4mm
    Lobe lift: 38.35 - 32.35 = 6mm (I don't have the Ford spec for a flat tappet cam, but this figure is essentially the same as the CFI roller cam below)

    1989 Pony CFI roller cam (my original):
    Nose to base: 38.5mm
    Base to base: 32.57mm
    Lobe lift: 38.5 - 32.57 = 5.93mm (Ford spec: 6.096mm)

    1990 GT EFI HO roller cam (the one that's in my head now):
    Nose to base: 38.68mm
    Base to base: 32mm
    Lobe lift: 38.68 - 32 = 6.68mm (Ford spec: 6.732mm)

    The base to base figures for the flat tappet cam and the CFI roller cam are closer to each other than the base to base figure for the GT roller cam, so though the 1.6 flat tappet cam is often described as a "performance" cam (or at least some of them are), I'm guessing that I might get better performance from the GT cam, though I don't know. Does anyone who has read this far know?

    So, I'm wondering if the rule that flat tappet cams and lifters can't be used in roller heads, and vice versa, is true of some cams and heads, but not true of them all?
    Last edited: Sep 15, 2017
  11. Tnashua

    Tnashua Gearhead / hot rodder with a soft spot for Scorts

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    Here is the little I know (have experienced) on the subject (my .02 worth):
    "Roller heads" can accept any cam. They were often fitted with hyd. cam/lifters...
    Non-roller heads lack the machining needed to fit the roller lifter retainers (a machine shop should be able to modify a non roller head to work with the lifter retainer if so desired)... The HO cam is supposed to trump most of the other cams based on lift numbers (the roller version being preferred due to the decrease in frictional losses). I don't recall exactly & don't have time to check for you (so don't hold me to this), but I think it was the European 1.6l and possibly the American 1.6l turbo cams that were racier than the HO cam, but they were all Hyd... I'm bushed- hopefully this helps (and in my exhaustion I haven't steered anyone wrong)...
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  12. John Sawyer

    John Sawyer FEOA Donator

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    Tnashua, thanks for the info! I was just reading your post about this, at the thread at https://www.feoa.net/threads/1987-98-efi-flat-or-roller-tappets.88457/, where I incorporated your info into a post I made there. My reading during the past year (mostly here at FEOA, but confirmed on other sites too) is that you're probably correct in thinking that the racier 1.6L cams all require flat tappets, which I'm not sure I'm interested in having, due to the friction issue you mention, and I don't want to have to do lash adjustments. Maybe I'll change my mind later if I'm not satisfied with the performance of the 1990 GT cam I've put into my head, though I'm not intending to do any racing with the 89 Pony I'm restoring (actually making into a hybrid of a Pony and a GT, without going so far as to replace the engine, head, intake, etc.). I'm pretty sure that the flat cam I found in the 89 LX head yesterday isn't one of these racier cams, since its lobe lift is essentially the same as my CFI roller cam, so maybe it was originally from a non-HO, non-turbocharged 1980-1985 1.6L Escort.

    Here's a photo of the 89 LX head's tappet bores, with the milled area around their tops that you describe for the roller tappet guide:
    89 LX head which had flat cam and lifters--view with rockers, lifters, etc. removed.jpg
    Last edited: Feb 10, 2016
  13. Sketch

    Sketch You Tube Tuner-vana

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    I am now i need of a Gt Cylinder head. Does any one have one they would sell?
  14. jjs3

    jjs3 New Member

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    I have a 1.9SOC type head (RFE5EE6090 A4E). I completely prepped for use on Mother-in-laws 95 Escort wagon, but she replaced car, so change in plans left me with extra head. Has been hot- tanked, pressure tested,& re-surfaced, valves & seats ground ( with parts replaced as needed),PC seals installed. Asking $250 +shipping. (Don't know if USPS has Priority Mail box to fit. If Not, suspect I can double cardboard- wrap & tape then Parcel Post for ~$20 , (exact quote with address). If interested I will email or upload photos. Not a hap-hazard build! Have been a Mechanic (professionally & hobbyist for 60+ years) and use best local machine shops. Located in Walla Walla WA, local pick-up vs. shipping OK. Cell # (541) 861-0456.
    Last edited: Aug 10, 2016
  15. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    Here's another I came across on ebay.

    Hemispherical chambers, casting number RF-F4CE-BA. Ford part number E8FZ 6049 B.
    Interesting that it is a 1994 casting number, I think it might be a service replacement for the first generation GT head. The seller listed it as follows:

    New OEM 1987-1990 Ford Escort EXP 1.9L Bare Engine Cylinder Head

    I'll see if I can get some pictures of it later.
  16. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    Pictures:

    RF-F4CE-BA cylinder head 1.9 GT 1.png RF-F4CE-BA cylinder head 1.9 GT  2.jpg RF-F4CE-BA cylinder head 1.9 GT  3.jpg RF-F4CE-BA cylinder head 1.9 GT  4.jpg RF-F4CE-BA cylinder head 1.9 GT  5.jpg RF-F4CE-BA cylinder head 1.9 GT  6.jpg

    Also, on the second image there is a B 95 visible cast into the head, probably indicating a casting date of 1995.

    Since the ebay seller has 5 or 6 of these for sale, it's likely that they came from Ford as a lot that was made for service replacements. It's also good to see the Ford part number on the box, assuming that indeed it is the correct box for the part.

    Ford casting numbers, or numbers stamped or printed onto parts, which are termed "Engineering numbers", are not the same as Ford part numbers. Often more than one Engineering number is associated with one part number. And part numbers can be superceded.

    There is a whole field of study of Ford part numbers. Those into 1960's cars have probably done the most research.
    Last edited: Jan 21, 2017
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  17. John Sawyer

    John Sawyer FEOA Donator

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  18. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    That's a pretty good read about Ford part and engineering numbers, but I think the classic Ford numbering system begins to change a little in the 1990s.

    Consider the part number of the head I pictured above, which has an E8FZ prefix.

    E8= 1988 original application, which is when the GT roller cam head was introduced, that part jibes.

    F in third position= Foreign sales / Trans Am Racing. Was it made for either? Seems doubtful.

    Z= Service part. Almost certain, since the casting date was five years after that particular style head was ever used in a new car.

    Unfortunately the Fordification article does not cover the 1999-up numbering system,

    The newer numbering system, while not relevant to first and second generation Escorts, is needed for studying the later Escorts, but is harder to find information about.

    Another problem is that we almost never know the real part number of the parts we are working with, rather we are using casting and marking codes, which could encompass several part numbers, as explained in the article.
  19. John Sawyer

    John Sawyer FEOA Donator

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    Ford does play a little loose with their part numbering systems.

    My guess about Ford using "F" in the third position of the four-digit prefix for some Escort parts, is that maybe these are the parts they designed for the GT models, and once these parts began shipping as service parts, Ford wanted a way of distinguishing them from the non-GT versions of these parts, and "Trans Am Racing" was the only description that came slightly close for this, within the parts numbering system they had at the time. Maybe once these parts, as service parts, started being installed outside of Ford manufacturing plants, Ford figured they'd help service techs to be able to distinguish between GT and non-GT parts.

    But judging by some other Escort part numbers I've seen, Ford also used "FZ" for some non-GT-specific service parts that also work in the GT. Maybe Ford figured that it made sense to label the service parts that work in both GTs and non-GTs using the same prefix for simplicity, but I'm guessing that there may be exceptions to this too.

    It's definite that, for at least some GT parts, their original part number contained a character other than "F" for the third position (probably usually "A" for "Ford"). For instance, when I went looking online in 2015 for a Ford 1.6L head gasket to use on my 89 Escort's 1.9L CFI (following UnexplodedCow's recommendation), I searched for E8FZ-6051-B since that's what I'd seen referenced as the proper part number. I ordered it from www.nospartswarehouse.com. When it arrived, the gasket itself was marked E8AJ-6051-AA along one edge, with "1.6" embossed to the right of this part number, but the box it came in had a label on one end that was printed E8FZ-6051-B.

    Ford published a part number reference that might be useful, their "1980-1989 Ford-Lincoln-Mercury Car Parts". I haven't seen it, but it was originally a paper publication, though some manuals dealers now sell it as a CDROM (last price I saw was $49.95). One source for this is www.faxonautoliterature.com, or from their eBay store (http://stores.ebay.com/Faxon-Auto-Literature). Here's their description: "This .pdf-format CD-ROM offers page-for-page reproductions of two Ford Motor Company parts catalogs - the 1980-1989 illustration catalog and the 1980 master parts and accessories catalog text. These books were written by Ford for the parts departments at their dealerships. You will find the original part numbers, which are still useful today because most parts vendors still use the original manufacturer's numbers to keep track of their parts. Use this CD to make your search for parts both quicker and easier. The illustrations will help you identify parts, and the exploded views of mechanical parts can aid you with the assembly or disassembly of some parts of the vehicle; you'll see many illustrations of mechanical parts. You will find thorough list of parts names and numbers for your entire vehicle including: wheels, hubs, drums, brakes, front axle, steering gear, rear axle, coupling shaft, frame, muffler, springs, engine, transmission, clutch, radiator, fuel system, generator, battery, starting motor, distributor, ignition coil, lamps & wiring, fenders, hood, windshield wiper, shock absorbers, standard parts, bumpers, accessories, and body parts. Find out if the parts on your car and the parts you are buying are original and complete. Find out which parts interchange with other years and models in the books."
    Last edited: Sep 15, 2017
  20. Joey_Twowagons

    Joey_Twowagons FEOA Member

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    I'd like to own that parts catalog, but I don't buy CD copies. I like the printed books. Maybe I'll add that to my ebay search list.

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