Searley

On ‎28‎/‎12‎/‎2017 at 0:15 AM, Mr Polson said:

No matter how you look at it, a stock 4.0 is a much more efficient, cleaner engine than a xflow.
Remember a xflow was introduced in the 70's, made for leaded fuel, and has a whole heap of anti-pollution gear - EGR, pulse air injection, very restricted carbies (worse as time went on).

A 4.0 was designed for unleaded and to meet much more stringent rules - which is why they don't have things like the EGR or pulse air.

I'd hazard a guess that there may be different ADRs for a 4.0 which a xflow would never be able to meet.
That's the way with just about everything.

We almost never sell heads at work, it's whole engines and even then that's very rare these days. Cars are just disposable once they become faulty to a lot of people.

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Hello Mr.Polson,Searley here again.Before I take my El 1999 XH Ford Head to a shop to get Crack/Pressure Tested & Shaved There's a Guy that has an AU Motor 200,000Kms with a Jim Mock Head Kit Dev3,meaning Double valve springs & Hi-Lift Cam,Variable valve timeing.Can this AU Head be Fitted Ok to my existing enginge?If so do I use my existing fuel injection system or keep with the already attached System.I can see from the photos it has different type of manifold? What about Fords Multi-Coil Ignition system.Can that be adapted? Anyway Send me some of your Wisdom & Knowledge.Much Appreciated,Searley.

On ‎25‎/‎12‎/‎2017 at 11:11 PM, deankdx said:

new head bolts and an AU head gasket is the recommended fix..

assuming the head is still dead flat(could get it machined while off but at least check it's not corroded around water ports or warped by using a straight edge across it, should be fine if not overheated

Hi deankdx,Thanks For Your Time And Advice,@ Least I'm On The Right Track Now,Best Regards Searley.

On ‎26‎/‎12‎/‎2017 at 6:34 AM, Valvebouncer said:

Ok. Firstly to clear up the misunderstanding, the only reason ef/early el and xh ohc blew head gaskets from factory were because of defective head bolts. The head of the bolt would break off. Ford themselves took responsibility for this back in the day and did a recall to replace head bolts before their clamping pressure released from the head breaking off and blowing the head gasket as a result.

I run a mls (multi layer steel) head gasket in my ute with the block decked 5 thou and 20 thou off the head. As Chris and Dean have said, you must have the head serviced and machined flat. Also you need to check the block, if there is pitting around the coolant galleries it will need to have the face machined. An mls head gasket has no give like a graphite head gasket. The mls one is actually designed so that the outer 2 layers will adhere to the head and block then as it heats and expands (remember aluminium head will expand more than an iron block) then once cool return to its normal seated position. Ford did this so they could run cylinder shut down technology in the case of over heating in au falcons.
Go buy yourself a good quality permaseal mls head gasket and be prepared to pay. Buy permaseal head bolts also. Any company willing to cast the part number in the head is worth using. I sprayed a light coating of hylomar on the head gasket before fitting. Follow the torque specs that come with the gasket. They are different from the graphite ones.
A Barra conversion into a xh is harder than all other x series because it runs a ef/el sub frame with less clearance for the alloy sump.

Greetings Mr.ValveBouncer,Thanks For The Experienced Knowledge.If The Block Has To Be Machined I Assume That The Motor Has To Come Out.Funny Thing I Took The Head To Be Tested And Shaved To Places That Have The Equipment And Used To Do Them But They Don't Do That Work Anymore Because It's Not As $Profitable. When I Took Off The Rocker Cover All The Heads Were On The Bolt But The Last 2 Bolts At The Rear Of Motor Were Incredibly Tight/Hard To Undo.Anyway I'll Take The Head To A Proper A Head Place Get It Tested & Shaved And The Block As Well,Permaseal AU Gasket,Permaseal Head Bolts & Hylomar,etc.Once Again I Appreciate Your Input.It's Nice To Have Success When Fixing Stuff.Best Regards Searley.

On ‎25‎/‎12‎/‎2017 at 10:39 PM, Mr Polson said:

AU motors are probably the most reliable of the Ford 4.0 SOHC. By then Ford went with a multi layer steel head gasket which solved the head gasket issue.

You can install an AU gasket into the older 4.0

Did you have the head machined? If not it was almost always going to blow again.

DOHC 4.0 (Barra) swaps are fairly simple and straightforward into the older X series.
Whether it would need a mod plate seems to vary greatly depending on who you ask and what state you're from.
Probably the best way to get a more powerful motor.

Xflow swap would never be legal due to emmisions, even if you went injected. Could also have clearance issues with the XH steering setup.

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Hi Mr.Polson,Thank You For Clarifying The Answer Picture,Why Do You Say The X-Flow Would'nt Be Legal Due To Emissions?I'd Still Use A Catalytic Converter. Still It Would Have To Be Legal Due To Insurance Reasons.If I Had A Prang With A $Hi-Dollar Car The Insurance Companies Will Do Anything To Get Out Of Paying!Anyway Thanks.

Hello Fellow Ford Men & Women.My XH Longreach Starting Blowing Pure Snow White Smoke Like A Nightclub Fog Machine While Playing Deep Purples "Smoke On The Water "Dureing The Victor Harbor Rock & Roll Festival.Lucky The Cops Did'nt See Me.It Was'nt Hot Or Overheating Or Working Hard.I Bought a Chinese Made Head Gasket That Some Of The Holes Were Not Even On The Gasket Compared To The Old Original Ford Gasket.I Heard Different Stories Of :Don't Use Any Sealant"To Use Just A Little Bit Around The Water Port Holes.Anyway It Did'nt Work.Some Very Knowledgeable People Said That These Type Of Ford Motors Are Reknown  For Having Head Gasket Problems Even If The Don't Overheat Or Low Mileage. Is There A Better Type Of SOHC Motor That's Reliable?Is It Legal To Put A DOHC Barra Motor In That 1999 Year In South Oz.I'm Even Thinking Of Putting In A 200 Cu/In Cast Iron Head Crossflow And Adapt The Fuel Injection Manifold Just To Have A Reliable Car.Can Anybody Help Me.Thank You For Your Time.

Hello,Does Anyone Know What's Involved In Converting A 200 X-Flow To Cast Iron Head(ie It Used To Be An Allow Head,To Be Converted/Marinized) I Heard It Can Be Done But There's A Few Things That Need To Be Done.What About Upgradeing The Distributor/Ignition System.