Exhaust gas recirculation? | 356 Speedster, 550 Spyder, Replica, Automotive Community

Former Member

I have a 2002 VS with a new 1641 with dual solex carbs and a pacesetter exhaust system. On the rear cylinder header's(closest to me when I am looking on the engine compartment) there are holes with flanges for bolts. From what I know this is the exhaust gas recirculation. In my '72 super beetle with a single carb, one of these holes has a tube leading into the header below the carb, and one leads into the air cleaner above the carb... from what I can tell. I have read a couple of books on vw's and motors and still can't quite comprehend this aspect.

1- is this in fact what I think this is.
2- is this essential for the engine to work properly, will I cause damage without it
3-would it be a really bad idea just to cap these holes off.

any suggestions for a rookie would be helpful.
Thanks, Wil

8/31/021:36 PM

Original Post

Replies sorted oldest to newest

Former Member

I have a 2002 VS with a new 1641 with dual solex carbs and a pacesetter exhaust system. On the rear cylinder header's(closest to me when I am looking on the engine compartment) there are holes with flanges for bolts. From what I know this is the exhaust gas recirculation. In my '72 super beetle with a single carb, one of these holes has a tube leading into the header below the carb, and one leads into the air cleaner above the carb... from what I can tell. I have read a couple of books on vw's and motors and still can't quite comprehend this aspect.

1- is this in fact what I think this is.
2- is this essential for the engine to work properly, will I cause damage without it
3-would it be a really bad idea just to cap these holes off.

any suggestions for a rookie would be helpful.
Thanks, Wil

Former Member

This is a preheater pipe for your intake manifold. It is not necessary and is not used on dual carb applications. This is simply to warm the intake manifold for cold winter days to enable a consistent running temperature for gas air mixture.

Former Member

if they are not already, make sure they are sealed off.

8/31/0210:03 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>