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Registered
Join Date: Nov 2001
Location: Austin, TX
Posts: 1,417
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Replacing valve springs with head installed
87 924S- 120,000 miles, recent front end service (10,000 miles ago)
Looks like valve springs on #3 are broken. Can I set to TDC, apply compressed air and replace the springs with the head on the motor? Trying to mitigate cost but do not want to be foolish either. Shop is willing to try this as I do not have time to do myself unfortunately. Thoughts? Morrie
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68 912 Coupe, 76 914 2.0 backdated, 76 912E SR Coupe" Gone but remembered- 76 911S SR Coupe "The Clown Car", 89 944S2 SR Coupe, 76 912E "Green Rat", 67 912 outlaw, 68 912 Coupe, 87 924S |
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03-25-2010, 09:16 AM
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Registered
Join Date: Mar 2008
Location: Chicagoland
Posts: 2,695
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yea u can do that. or another method is to feed in a rope.
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03-25-2010, 09:53 AM
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Registered
Join Date: Jan 2008
Location: Central California
Posts: 462
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I haven't done it on the 944, but I've used both methods on other cars to change valve seals/springs. I prefer the more old school way of pulling all the spark plugs, feeding a rope into the spark plug hole and gingerly turning the motor squish it and put pressure on the valve.
The other way works great on a newer motor. On older ones it can be hard to keep enough air pressure due to blow by, I had a valve fall that way before.
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84 Red 944 NA - Das Swurvenwagen - still street legal but it's just a track toy My Website: http://www.TrackPics4Less.com |
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03-25-2010, 10:17 AM
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All Spooled Up
Join Date: May 2009
Location: Between NE and Central PA
Posts: 2,516
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Quote:
I don't think it would fall very far on a 944 engine, if the piston is @ TDC. I'm sure you would be able to pull it back up. Although I used the compressed air method when I did the seals on my 77 924 way back when, I think I've been roped in to using the other method if I ever need to do it in the future.
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>gray 89 951S - K27/8, MAF, 3" intake, 3" exhaust w/separate waste pipe, 55# inj, late cam; >red 87 924S - chip, K&N, punched-out cat&muffler >black 80 924 - (sold) >maroon 77 924 - auto (sold) |
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03-25-2010, 03:47 PM
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