Slight knock on start up...
04-13-2009, 05:03 PM
#1
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Slight knock on start up... My car sits most of the week, when the weekend comes and i start it up it seems to have a small knock sound to it on the first startup,....
Should i switch my oil weight?
Is this normal on thisthe lt1 motor ?
It isnt bad or realy loud but i just notice it....
Should i switch my oil weight?
Is this normal on thisthe lt1 motor ?
It isnt bad or realy loud but i just notice it....
04-13-2009, 07:43 PM
#4
Mine does it to. It did it bad when I changed my oil and used Castrol GTX 10w40 and then I switched to Castrol Syntec 5w30 and it quieted it down alot. Mine does it for about 30 seconds and stops. I think its just a little lifter tapping while they are filling back up after sitting all night.
My oil pressure is 60 on startup and when warm its 20 idling and 40 cruising.
My oil pressure is 60 on startup and when warm its 20 idling and 40 cruising.
04-13-2009, 07:51 PM
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Mine does it to. It did it bad when I changed my oil and used Castrol GTX 10w40 and then I switched to Castrol Syntec 5w30 and it quieted it down alot. Mine does it for about 30 seconds and stops. I think its just a little lifter tapping while they are filling back up after sitting all night.
My oil pressure is 60 on startup and when warm its 20 idling and 40 cruising.
My oil pressure is 60 on startup and when warm its 20 idling and 40 cruising.
04-13-2009, 07:55 PM
#6
I may get flamed for this, but the lucas oil additive is supposed to prevent dry startups, you may want to add a half quart next time you change your oil. Just make sure you use the synthetic kind if you use synthetic oil. I wouldnt use a full quart though because it is so thick.
04-13-2009, 09:14 PM
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I may get flamed for this, but the lucas oil additive is supposed to prevent dry startups, you may want to add a half quart next time you change your oil. Just make sure you use the synthetic kind if you use synthetic oil. I wouldnt use a full quart though because it is so thick.
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04-13-2009, 10:51 PM
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If it keeps doing it/gets worse might not be a bad idea to replace the lifters too.
04-14-2009, 02:03 PM
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it only does it the first few seconds ( maybe 20 30 seconds??) ,if it sits for a few days .
Other then that if I run it a coupke days in a row it seems good.
Other then that if I run it a coupke days in a row it seems good.
04-14-2009, 02:31 PM
#12
well the valvetrain parts move faster than the bottom end so we need figure out what your hearing.
valvetrain noise= tick.tick.tick....
bottom end noise= knock....knock....knock
when you lisien to the noise try to match it to my half *** description. a valvetrain noise will sound faster and more erratic than a bottom end knock. Since the valvetrain moves up and down faster than the rotating asembly rotates.
valvetrain noise= tick.tick.tick....
bottom end noise= knock....knock....knock
when you lisien to the noise try to match it to my half *** description. a valvetrain noise will sound faster and more erratic than a bottom end knock. Since the valvetrain moves up and down faster than the rotating asembly rotates.
04-14-2009, 02:39 PM
#13
I have a question, if my lifters are ticking in the morning will new ones fix the problem or is it because the clearences are getting bigger with the engine wearing down. 128xxx miles on it. Reason I ask is Im contemplating a cam change, which will come with a completely new valvetrain, and dont want to do it and my engine blow in 2k miles. 