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Original Message

Maybe the worn guides caused the contact.

By Dave Shoe - 02/08/2004 9:42:45 AM; IP 216.243.176.34

This is not scientifically rigorous, since I can't see whether the guides were worn out, or fatigued, or damaged, but if fast-wearing guides were the origin of the failure, this might cause valve head misaligment sufficient to contact the piston outside the relief area, especially if the valve had to "bounce" a little to find the seat.

High res photos are really needed to make a preliminary determination here. You can email some to me if you wish, but I'm not going to be able to offer a professional diagnosis at this distance, even with photos. Maybe I can offer some strong clues, however.

I remain confused by the "blown headgasket" statement, as that was a major original issue which seems to have disappeared. What was the deal with the headgaskets?

Shoe.

This thread, so far...

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Collapse <a href=../ForumFE/reply.aspx?ID=20082&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20082" onclick="return false;">Bent Pushrods</a> -- <font color=#0000ff>Tim P., <i>02/06/2004</i></font><script type="text/javascript">
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Bent Pushrods -- Tim P., 02/06/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20088&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20088" onclick="return false;">What do the tops of the pistons look like?</a> -- <font color=#0000ff>Royce Peterson, <i>02/06/2004</i></font><script type="text/javascript">
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What do the tops of the pistons look like? -- Royce Peterson, 02/06/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20091&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20091" onclick="return false;">RE: What do the tops of the pistons look like?</a> -- <font color=#0000ff>Tim P., <i>02/06/2004</i></font><script type="text/javascript">
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RE: What do the tops of the pistons look like? -- Tim P., 02/06/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20092&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20092" onclick="return false;">The crank is probably fine.</a> -- <font color=#0000ff>Royce, <i>02/06/2004</i></font><script type="text/javascript">
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The crank is probably fine. -- Royce, 02/06/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20094&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20094" onclick="return false;">RE: The crank is probably fine.</a> -- <font color=#0000ff>Tim P., <i>02/07/2004</i></font><script type="text/javascript">
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RE: The crank is probably fine. -- Tim P., 02/07/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20095&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20095" onclick="return false;">Are you sure the head gasket failed?</a> -- <font color=#0000ff>Dave Shoe, <i>02/07/2004</i></font><script type="text/javascript">
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Are you sure the head gasket failed? -- Dave Shoe, 02/07/2004

RE: Are you sure the head gasket failed? -- Tim P., 02/07/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20105&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20105" onclick="return false;">The "steel" guides are actually cast iron.</a> -- <font color=#0000ff>Dave Shoe, <i>02/07/2004</i></font><script type="text/javascript">
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The "steel" guides are actually cast iron. -- Dave Shoe, 02/07/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20107&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20107" onclick="return false;">RE: The "steel" guides are actually cast iron.</a> -- <font color=#0000ff>Tim P., <i>02/07/2004</i></font><script type="text/javascript">
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RE: The "steel" guides are actually cast iron. -- Tim P., 02/07/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20108&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20108" onclick="return false;">Stock valve springs? Red flag!</a> -- <font color=#0000ff>Royce, <i>02/07/2004</i></font><script type="text/javascript">
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Stock valve springs? Red flag! -- Royce, 02/07/2004

RE: Stock valve springs? Red flag! -- Tim P., 02/07/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20116&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20116" onclick="return false;">Hey Royce: What FE replacement piston has...</a> -- <font color=#0000ff>Dave Shoe, <i>02/08/2004</i></font><script type="text/javascript">
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Hey Royce: What FE replacement piston has... -- Dave Shoe, 02/08/2004

RE: Hey Royce: What FE replacement piston has... -- Tim P., 02/08/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20120&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20120" onclick="return false;">They are not necessarily mis positioned but</a> -- <font color=#0000ff>Royce, <i>02/08/2004</i></font><script type="text/javascript">
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They are not necessarily mis positioned but -- Royce, 02/08/2004

Collapse <b>Maybe the worn guides caused the contact.</b> -- <font color=#0000ff>Dave Shoe, <i>02/08/2004</i></font>

Maybe the worn guides caused the contact. -- Dave Shoe, 02/08/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20127&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20127" onclick="return false;">RE: Maybe the worn guides caused the contact.</a> -- <font color=#0000ff>Tim P., <i>02/08/2004</i></font><script type="text/javascript">
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RE: Maybe the worn guides caused the contact. -- Tim P., 02/08/2004

Collapse <a href=../ForumFE/reply.aspx?ID=20128&Reply=20082><img src=../images/reply.png width=30 height=10></a> <a href="#" id="anchor20128" onclick="return false;">RE: Maybe the worn guides caused the contact.</a> -- <font color=#0000ff>Tim P., <i>02/08/2004</i></font><script type="text/javascript">
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RE: Maybe the worn guides caused the contact. -- Tim P., 02/08/2004

RE: Maybe the worn guides caused the contact. -- Mike, 06/30/2005

very odd clues -- John, 06/30/2005