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Old 06-28-2002, 07:37 PM
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Post 305 engine valve stem seals

Hi chevy friends,
my bone stock, mint Caprice Classic Brougham, (V8, 305?)"89
starts with a blue smoke after a nightlong standstill.
I guess thats the valve stem seals; I'm living in Dominican Republic and nobody around here has the recommended tool to change the seals. Question: is there a way to change them without that special tool? (I don't want to take the heads of)
Is this a very difficult job? Following Haynes or chilton manual it looks pretty easy. Any help? Suggestions?
Pablo
<a href="http://www.casalindaonline.com" target="_blank">web page</a> casalinda@codetel.net.do [code] </pre><hr></blockquote>

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Old 06-29-2002, 08:55 AM
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Pablo....I just changed my valve seals this past weekend. I never realized how simple heads are until then. I pulled my heads off but I have heard that you can change the seals with the heads on. Now this is just what I've heard, so I don't know how true it is, but I was told that you can put air pressure in your cylinders to hold the valves up (if you don't do this the valves will fall into the cylinder and you will have no choice but to pull your heads). I think this is done by putting the right fittings on an air tank and hooking it up where your spark plugs go. You will have to have a spring compressor. I would recommend going to auto zone and renting one for a few bucks and then returning it when you're done...they'll give all your money back. Make sure you tell them you're not pulling your heads so that they give you the right compressor (the one I used was really old and looked like a big c-clamp..heads had to be off to use it). I'm sure there is someone on this site that knows more about this than me and I feel pretty confident that they will post more info for you so wait a couple days and see what these guys have to say. I hope I have helped...HRS10
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Old 06-29-2002, 09:06 AM
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thanks, Hotrod, but there is no such thing as Autozone down here in Domincan Republic. you don't know how lucky you are in the US, just drivin to the next speed shop, buy the part or tool and that's that.
Anyhow, thanks for the reply, will try my luck. Maybe it's even better to take the heads off and check heads and bore and so on.
pablo
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Old 06-29-2002, 11:42 AM
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Dont know if summit delivers there but heres the address summitracing.com they have the tool you need.if you dont have a air compressor take a 1/4 inch cotton rope about 8 feet stuff it in your cylinder leaving about foot hanging out turn motor over by hand till piston smashes the rope agaist the valves then you can remove the springs.this will hold the valves in place.hope this helps.(wrenchturner)
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Old 11-21-2007, 11:30 AM
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Valve seal replacement

Just to confirm that the comment about the cotton rope is good advice and really important and easy to do. Make sure when you get an air compressor that it's big enough to maintain good pressure because you'll get a little leak-down while the air's holding the valve closed so the pressure's got to be maintained well. There are several different designs for the lever that you'll use to compress the valve spring, remove the keepers and retainer, etc. The simplest one is just a stamped steel lever with a slot in the end and it's very hard to use and requires strength in your arms. Go for a tool that is adjustable and provides good lever action...it makes it much easier when you're reassembling the valve spring, retainer, keeper.

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