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Registered
Join Date: Aug 2010
Posts: 5
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8valve vs 16valve
Right now I have an 87 944 with 8 Valves and what it sounds to me is that the valves need to be adjusted. When I accelerate from a stop you can hear them rattling the loudest and constantly while driving. I want to port and polish, but I hear they are supposed to be self adjusting. So am i diagnosing the wrong problem or is there a way to fix this? My main goal though is to turbo this car, so all suggestions would be in the realm of how to fix this to end up with that goal. But that rattle is super annoying and if i can fix that relatively cheap I will do that regardless! Thanks
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08-10-2010, 09:57 AM
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Registered
Join Date: Mar 2008
Location: Chicagoland
Posts: 2,695
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there is no adjustment you can do. the valves are topped by hydraulic lifters that the cam rides on directly. there is no rocker and no valve lash.
it's hard to definitely diagnose a "rattling" it could be dead lifters or something more serious. u'd need to pull off the cam tower to see. as ppl have said before, if u want to turbo, buy a turbo car. it'd be cheaper. |
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08-10-2010, 10:28 AM
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Garage Helper
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Change to a higher grade of GAS to see if that stops the knock - Cheep GAS will give the rattle/pinging while accelerating and with each ping/knock a small flake of piston aluminum is going out the exhaust...
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78-924 traded for 80-931 traded for 84-944 traded for 85.5-944 (7th one now).  UAV-M1 (Urban Assault Vehicle - Model 1) Bless the lowered, and pass the nitromethane. Pedal to the metal till you see the gates of hell then brake NLA - No longer available is a four letter word |
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08-10-2010, 10:56 AM
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Non Compos Mentis
Join Date: May 2001
Location: Off the grid- Almost
Posts: 10,594
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Is it valves rattling, or fuel injectors clicking?
Fuel injector noise is normal. |
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08-10-2010, 12:30 PM
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Registered
Join Date: Jan 2004
Location: Northern Virginia
Posts: 3,347
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Ha... he said
Quote:
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1970 914-6 Past: 2000 Boxster 2.7, 1987 944, 1987 924S 1978 911SC, 1976 914 2.0, 1970 914 w/2056 |
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08-10-2010, 01:31 PM
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your average wrencher...
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Quote:
Quote:
replace "to" with "a" and lose "this" FIXED!!!
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1982 931 *project* 1986 951 Garrett turbo, Rogue Tuned (sold  )1987 944S chipped, konis, rollbar (traded) 1979 924 total rebuild and blueprinted (sold) |
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08-10-2010, 04:09 PM
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Under the car
Join Date: Jan 2008
Location: Ross, Ohio
Posts: 585
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Why was "16 valve" mentioned in the title of the thread but then nothing was said about 16 valves in the post?
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08-11-2010, 11:56 AM
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ORACLE
1986 Porsche 944 turbo
