Benzsupra Posted September 19, 2005 Share Posted September 19, 2005 Hi All, Before it's said i have searched the forum and cannot find anything similar. I seem to have devloped a knocking noise at the front of my engine, right where the cam wheels are. I am not mechanically minded so i don't know what they are called. It seems to come and and fade away every 20 second or so, and is quite a rapid knock. It sounds similar to knocking something plastic against the engine if this helps. Wondered if anyone can give me an idea of what it may be. BTW after reading some of the other threads i topped the oil up to see if that helped cause they mentioned that, but havent had it changed for about 4000 miles. Thanks Everyone. Link to comment Share on other sites More sharing options...
Vagnum Posted September 19, 2005 Share Posted September 19, 2005 have you checked your timing belt!!!! take the top cover off and see if it's loose or flaping around when the engine is running! Link to comment Share on other sites More sharing options...
Benzsupra Posted September 19, 2005 Author Share Posted September 19, 2005 I haven't checked it, but i had it changed when it was serviced about 5 months ago By Miami GT. If it was this wouldn't the engine be running funny as it is not it still sounds exactly as it did this afternoon. Then this evening it started all of a sudden, wasn't racing it or anything just driving normally stopped at some lights and i could hear it. Link to comment Share on other sites More sharing options...
uk-rich Posted September 19, 2005 Share Posted September 19, 2005 is anything touching the fan, can make a lot of noise Link to comment Share on other sites More sharing options...
Benzsupra Posted September 19, 2005 Author Share Posted September 19, 2005 That was my first thought but i checked for that, you can actually feel it if you put your hand on top of the engine. And it speeds up if you rev it up a bit untill it's drouned out by engine noise. Link to comment Share on other sites More sharing options...
Vagnum Posted September 19, 2005 Share Posted September 19, 2005 depending on how loose the belt became the car would still run the same and would just flap about hitting the top of the cam belt cover if it got really loose it would jump a tooth and missfire or kill the enigne! Link to comment Share on other sites More sharing options...
Benzsupra Posted September 19, 2005 Author Share Posted September 19, 2005 That doesnt sound good, is this something i can check (bearing in mind my mechanical knowledge only stretches to oil changing), is it just a case of taking the plastic bit with Toyota written on it off and checking the tension. If so how much movement is to be expected, and is it ok to start the car up to check with that cover off? Link to comment Share on other sites More sharing options...
Vagnum Posted September 19, 2005 Share Posted September 19, 2005 ya take the cover off i think about 10 5mm allen key bolts make sure theres no bits that can fall in to the belt area push the belt with your fingers and see if theres any movement it should be firm, when you start it up just look at the belt's movement between the cam pulleys and going down to the crack it shouldn't move to much! DON'T PUT YOUR FINGERS IN WHILE THE ENGINES RUNNING! Link to comment Share on other sites More sharing options...
Jake Posted September 19, 2005 Share Posted September 19, 2005 It sounds very like the problem I had when my cambelt tensioning idler wheel bracket had snapped off. (Part A in this picture) Oddly enough mine snapped shortly after Max GT had changed my cambelt. I'm sure that's just a coincidence though. Link to comment Share on other sites More sharing options...
Benzsupra Posted September 19, 2005 Author Share Posted September 19, 2005 Thanks For the help guys, will try this out on the morrow. Link to comment Share on other sites More sharing options...
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