aussie heads | The De Tomaso Forums

Guest

Took the plunge for a little more power and installed a set of closed chamber aussie heads. Bought a set used heads--naturally --sent them to the machine shop--magnafluxed--new valves and springs-camshaft--intake--(weiand 7516)etc. Problem is water in the oil--changed head gaskets twice--put in ARP bolts--I have done this 2 times and still have water in the oil. Pressure test is tight when engine is cold--warm engine shows leak in cooling system. The oil breather spews steam--I get no water through the exhaust--so I don't think the problem is the block--didn't have this problem with the stock 4V open chamber heads--it all boils down to the heads or intake-anyone had this problem--I really think one head must be cracked--although magnifluxing showed no anolomies. I don't know what the heads have been through--like excessive machining --anyone know what the formula is for computing the amount of intake machine work is required for x amount of material removed from the heads??????????????

6/3/057:18 PM

Original Post

George PAdmin.

Its not the intake, no coolant flows through the Cleveland's intake. Its most likely a head, unless the deck of the block is scored somewhere or warped. Cracks can occur in unusual places, most likely you have a crack hidden from the magnaflux operators view. Some head service shops have the ability to pressurize the bear head (necessary with aluminum heads), this will reveal cracks magnafluxing sometimes misses.

George

6/4/051:20 PM

<div id="{%=id%}" class="reveal-modal small h-alert-modal-popup" data-reveal>
    <div class="first-modal-focus focus-utility-element" tabindex="0" aria-label="Inside Modal"></div>

<h4 id="{%=id%}_title" class="margin-bottom-10 popup-title"></h4>
    <div id="{%=id%}_body" class="margin-bottom-10 popup-body">
        </div>

<ul id="{%=id%}ButtonGroup" class="button-group h-popup-buttons even-button-group even-1">
    <li id="{%=id%}Okay_buttonContainer"><a id="{%=id%}Okay" href="javascript:void(0);" class="button success no-margin-bottom h-alert-modal-ok-button" role="button">OK</a><script type="text/javascript">
        (function() {
            function {%=id%}Okay_click(event, data) {
            {%=id%}Popup.hide();
        }
        
                $('#{%=id%}Okay').on('click', {%=id%}Okay_click);
        })();
    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
        (function() {
            {%=id%}Popup = new SS.Popup.ModalPopup('{%=id%}');
        })();
    </script>