 7afe head, doesnt have normal rockers |
 May 18, 2004 - 2:03 AM
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 Enthusiast  Joined Mar 2, '04 From Little Rock, AR Currently Offline Reputation: 0 (0%)  |
ok, so the 7afe head uses a different style of rocker arms, right? my head has a real bad tick when i shift a certain way, when i hold the gas half throttle, or when im accelerating over 4500 rpm. anyone ever had similar problems?
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May 18, 2004 - 2:44 AM
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 Enthusiast Joined Sep 6, '03 From Fairbanks AK Currently Offline Reputation: 0 (0%) |
first off overhead cam engines do not have rocker arms. check your timing mine did the same thing and it was due to the timing being off a bit. If you don't know how to do it just take it to the shop 'cause you gotta bypass something or the computer will just compensate for whatever changes you make.
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May 18, 2004 - 11:18 AM
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Enthusiast Joined Aug 31, '02 From KC Currently Offline Reputation: 0 (0%) |
Actually, it depends on the particular brand and model of engine, there are lots of overhead cam engines with rocker arms, single overhead cam will almost always have some type of rocker setup. My wife's 280SE Mercedes was double overhead cam with rocker arms...all depends on the engineer's design... The double overhead cam 5SFE and 7AFE do NOT happen to have them. They use shims between the cam and valve tip, pull the valve cover and use a feeler gauge to check the clearance, easy enough to check, you can copy the procedure from the library ref manuals, have to pull the cams to change shims if they are out of spec on clearance...I'd invest in a new valve cover gasket and check it myself, if it needs adjusted, you can always take it to the shop if you dont want to do it yourself. As far as the noise, thats a good possibility, could also be a loose heat shield, or pinging from low octane fuel. or any number of things... |
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May 18, 2004 - 8:15 PM
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Enthusiast Joined Mar 2, '04 From Little Rock, AR Currently Offline Reputation: 0 (0%) |
the noise has stayed at a consistant volume, and i havent lost any power gradually. i dont think its detonation because when i take out the spark plug on a cylinder, it still makes the same noise in the same pattern, increasing tick as RPM increases. thanks for the feedback, and when i meant rocker, i meant in general that part of the motor.
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May 18, 2004 - 8:41 PM
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 Enthusiast Joined Dec 27, '03 From Nor Cal Currently Offline Reputation: 0 (0%) |
Could be a rod knock... Usually when there are valve/head problems... the engine doesn't run very well. -------------------- "It's ok to be naked girl... I'm an artist!"
1995 AT200 Celica ST: stocked out daily driver... 1984 AE86 Corolla GT-SR5: silvertop 20V 4AGE project car jacked up with goodies... 1991 SW2x MR2 n/a: bare bones hardtop model soon to be... |
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May 18, 2004 - 9:22 PM
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Enthusiast Joined Mar 2, '04 From Little Rock, AR Currently Offline Reputation: 0 (0%) |
well i thought it could be a rod bearing or rod knock, but my motor would have gone out by now.
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May 18, 2004 - 10:02 PM
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Enthusiast Joined Jun 21, '03 From FRANKFORT,KENTUCKY Currently Offline Reputation: 0 (0%) |
Sounds like it's rod knock or your bearings to me too.
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May 18, 2004 - 10:34 PM
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 Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
it's while you're giving it pedal right? And then, will it stop after a certain RPM level? and it won't do it Under a certain level?
If so, my car was doing the samething. I needed a new timing belt. It's fixed now, and is great. |
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May 18, 2004 - 11:42 PM
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Enthusiast Joined Mar 2, '04 From Little Rock, AR Currently Offline Reputation: 0 (0%) |
yeah, exactly! how much did you get the belt for?
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May 18, 2004 - 11:57 PM
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Enthusiast Joined Dec 26, '02 From Alabama Currently Offline Reputation: 2 (100%) |
the belt itself is cheap, but I had it installed. It's a real pain to get to, I would advise taking it to toyota or a local shop.
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