About to drop a valve!?
#11
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I think if the motor was over-revved at least 70k miles ago (prior to you owning the car) and it was enough to crack retainers they would be very obvious by now with a further 70k+ miles on them. You probably would have dropped a valve already. Before you throw money at them get some more opinions as the pics don't show much. Definitely wait for Billman250 to chime in.
#12
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you don't need to be a mechanic to replace your intake retainers. you sure as hell shouldn't spend $500 on it.
you can buy the parts for around $80
as far as tools all you really need is an overhead valve spring compressor, 30$ from amazon.com
an air compressor with a spark plug adapter will make it easier when you need to support the valve with the keepers out but you can always move the cylinder to TDC to support it.
i did mine by myself following the DIY on this site. the hardest part was getting the cams back in timing but now that I look back at it, i wasn't paying attention enough.
you can buy the parts for around $80
as far as tools all you really need is an overhead valve spring compressor, 30$ from amazon.com
an air compressor with a spark plug adapter will make it easier when you need to support the valve with the keepers out but you can always move the cylinder to TDC to support it.
i did mine by myself following the DIY on this site. the hardest part was getting the cams back in timing but now that I look back at it, i wasn't paying attention enough.
#14
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they are exhaust springs. Thats why I want billman to attend this convo. You can see the wall of the retainer, they arn't flush. Which would indicate a cracked retainer correct?
#15
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I was under the impression that only AP1 intake retainers crack from overrev. You'd break other stuff from valve float before you'll crack the exhaust retainers.
#19
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That first pic sure looks like a broken retainer, but its too blurry to be sure. Just take a better pic. Even todays cell phones have a "flower" setting that lets you get detailed up close pics.