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post #1 of 3 (permalink) Old 06-08-06, 05:34 AM Thread Starter
Injection is nice But
 
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Join Date: Mar 2004
Location: Perth WA
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mad Information 5.4 valves springs

My car has broken two valve springs & I need the factory specs to check the rest .
Ford only wants to replace the broken ones I want them to replace the set.

Does anyone have the Valve spring seat & open pressure for a boss 290?

Any help would be appreciated


Last edited by BAGTHO; 06-08-06 at 05:35 AM. Reason: spelling
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post #2 of 3 (permalink) Old 06-09-06, 04:44 AM
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Re: Information 5.4 valves springs

If it's the eame spring the generic 4v heads use, 60 pounds seat and around 160 open. Broken springs in a dohc are very rare. I have rebuilt hundreds of them and never seen a broken spring.

'97 Cobra dohc 5.4 590+rwhp
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post #3 of 3 (permalink) Old 06-09-06, 06:48 PM Thread Starter
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Re: Information 5.4 valves springs

If the geniric 5.4 springs are made in Germany. They would be the same as we use on the 290. I spoke to Ray fron Crow Cams the company that made the cams for the Boss 290 in Australia & he said the same thing , Stock springs made in Germany with about 60lb seat pressure .

Very rare to break.
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