Tap Tap Taparoo....w/ vid
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From: Fayetteville NC
Tap Tap Taparoo....w/ vid
I've posted this on LS1Tech as well. My car has developed a tap/tick at idle. From what I can tell it's only at idle, & goes away as revs go up. The car runs very strong, no hesitations etc... Mods are in my sig. Reused stock lifters, as they only had 10k miles on them when I did the h/c swap. Seems to be more audible from the driver's side. I'm assuming it's a lifter issue, but I thought I'd get some more opinions.
http://www.youtube.com/watch?v=2XqZUtN2xN0
http://www.youtube.com/watch?v=2XqZUtN2xN0
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From: Fayetteville NC
Originally Posted by WKMCD
Welcome to the world of cam'd motors. They are going to make more valve noise plus the headers will amplify the ticking that the cast manifold used to mute.
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Joined: Dec 2004
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From: Haymarket VA
Make sure it's not a leak at the headers. They can sound like a ticking sound. I you do replace the lifters, look at the new GM Cadillac racing lifters. That's what I'm using in my 402 build. SDPC has them.
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From: Fayetteville NC
Originally Posted by gpracer1
Did you do all that to your motor and re-use the stock pushrods?
Well, I guess I should say what I have checked. I checked the header bolts (all good), I checked all spark plugs (all good), I removed both valve covers in inspected the rockers (all good) & springs (all appear to be good, though the inner springs are hard to see). I put a can of seafoam in the gas, & 3/4 can in the crankcase which did quiet the noise, but didn't get rid of it. I've got about 200 miles on the oil w/ seafoam in it, so I'm going to change it this weekend to a thicker 10w-40 oil to see if it helps.
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From: Fayetteville NC
Originally Posted by muncie21
Sounds like the preload isn't correct on one or more lifters. If all the rocker bolts are tight, you may be needing to replace lifters soon.
I'm already searching for some replacement lifters, & trays. I'm just hoping that if one or more have failed, that it didn't take out a cam lobe too.
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From: Fayetteville NC
Well, changed the oil this weekend. Put AMSOIL 10w-40 in her, & the tap is completely gone! Actually seems to have quieted down the all the valvetrain considerably. Now I can spend the money I was going to use on new lifters, head gaskets, head bolts, etc..., on some drag radials!!
Where's the best place to get 305/35 18 Nitto 555R
Where's the best place to get 305/35 18 Nitto 555R
Le Mans Master
Joined: Feb 2006
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From: Phoenix AZ
Originally Posted by TSDuke
Well, changed the oil this weekend. Put AMSOIL 10w-40 in her, & the tap is completely gone! Actually seems to have quieted down the all the valvetrain considerably. Now I can spend the money I was going to use on new lifters, head gaskets, head bolts, etc..., on some drag radials!!
Where's the best place to get 305/35 18 Nitto 555R
Where's the best place to get 305/35 18 Nitto 555R
Team Owner
Joined: Mar 1999
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From: At the beach in little Rhody
You may want to consider 7.425 pushrods, sounds like your pushrod length is marginal to obtain proper preload. Heavier oil would be a bandaid. How did you determine the pushrod length? How much lifter preload are you running?
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From: Fayetteville NC
Originally Posted by gpracer1
What kind of oil did you have in there in the first place?
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From: Simi Valley CA
Originally Posted by TSDuke
The noise started when I put German Castrol 0w-30 in it. Removed it after about 2 days, & replaced it with what I normally run, AMSOIL 5w-40. The noise was still there so I put 3/4 of a can of SeaFoam in it for 250 miles. Changed this weekend to AMSOIL 10w-40, and the noise it gone.
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From: King George VA
Originally Posted by Todd157k
is the Amsoil better than the Mobil 1?
Here are a couple of comparisons and an actual used oil analysis report done on a fellow forum members car:
Comparative Motor Oil Test Nov 05
Comparative Motor Oil Test Dec 03
Used Oil Analysis Comparison: German Castrol 0w30 vs AMSOIL Series 2000 0w30
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C66 Racing #66 NASA ST2, SCCA T2
AMSOIL Dealer (Forum Vendor)
AMSOIL Preferred Customer Program (Members buy at Wholesale - a savings of about 25%)
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From: N.J.
Originally Posted by vettenuts
Sounds like it was a carbon issue, not really the GC although you are running a heavier oil than GC.
if anyone knows, thanks.
