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changing valve springs without pulling a head
Posted: Thu Jul 28, 2016 10:49 am
by MattStrike
Where can I find the adapter for the spark plug hole to use the air compressor to hold the valve up, and what PSI does it need to be set to? I couldn't find the write-up (maybe I'm being lazy).
Re: changing valve springs without pulling a head
Posted: Thu Jul 28, 2016 11:54 am
by bs009
you could just use the pistons to keep the valves from falling. When I changed the valve stem seals on the Regal that's what I did. I just rotated the crank until the cylinder I was working on was at TDC.
Re: changing valve springs without pulling a head
Posted: Thu Jul 28, 2016 3:03 pm
by Zeik75
I shoved some like 4 gauge power wire in and rotated up to hold the valves up. like the old rope trick without all the little frayed bits left in the cylinder.
Re: changing valve springs without pulling a head
Posted: Thu Jul 28, 2016 5:19 pm
by Luxrain
just thought of maybe a balloon may work too
Re: changing valve springs without pulling a head
Posted: Fri Jul 29, 2016 8:19 am
by 1oldman
Personally, I'd rather rotate the piston in each cylinder to TDC as I did each valve set fr that cylinder than take a chance on loosing the compressed air out of the cylinder. Me, with my luck, I'd loose the air and the valve would drop into the cylinder. - BC
Re: changing valve springs without pulling a head
Posted: Fri Jul 29, 2016 10:57 am
by 95naSTA
When I did this without rotating the crank, I remember using a compression tester fitting with maybe an adapter fitting to a male air line fitting? I used about 100 psi.
Re: changing valve springs without pulling a head
Posted: Fri Jul 29, 2016 11:13 am
by Archon
I used the adapter from the leak down tester from Harbor Freight.
http://www.harborfreight.com/cylinder-l ... 94190.html