fisha Posted August 22, 2006 Share Posted August 22, 2006 If you listen to this sound file, you should be able to hear a sound from my engine going whu whu whu hwu whu, which has developed recently. The sound is here: V8 If you use a screwdriver to the ear method, the sound is most noticable when you listen to the top of the rocker cover above cylinder #4. You cant hear it as much if you listen to the inside of the cylinder head at #4 (you hear the injectors instead ) and nor can you hear it as clearly if you listen to the exhaust manifold bolt of #4. The sound isn't there when cold, but is there once the engine is warm and your sitting at idle. Obviously, there are 2 prime causes running through my mind. One not too terrible, the other serious. - rocker shaft / rockers - dropped liner. Based on listening to the sound file, do people think its likely to be one or the other . . . . if so which? I have to say that i would have assumed that a slipped liner would make a definitive clicking / tapping / knocking sound as the liner slaps off the cylinder head / block. This seems to be more of a rubbing sound , almost like a dry pulley going round. I'm going to take the rocker cover off at the weekend, but thoughts in advance are gratefully welcome. Quote Link to comment Share on other sites More sharing options...
DEANO3528 Posted August 22, 2006 Share Posted August 22, 2006 Take the fan belt off. What's the betting it's either the belt too tight or water pump/alternator bearing. Quote Link to comment Share on other sites More sharing options...
fisha Posted August 23, 2006 Author Share Posted August 23, 2006 I'm not convinced that it is one of the auxilaries yet. The screwdriver to the ear method on things like the alternator just gave the normal expected sounds of the axles whirring around happily. Quote Link to comment Share on other sites More sharing options...
pugwash Posted August 30, 2006 Share Posted August 30, 2006 hey fisha, that is a weird noise, and first port of call would have to be the auxilaries before you do anything else. It's defintiely a weird harmonic rythmic noise but i just can't think of anything that might do that. sorry. Quote Link to comment Share on other sites More sharing options...
istruggle2gate11 Posted October 5, 2006 Share Posted October 5, 2006 mmm, I have had a similar sound, it was a brand new water pump and it failed within two trials (say 4 hours running). Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.