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#1
03-25-2003, 02:29 PM
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I've had a Tic, Tic, around 5 & 7 in my 389 since I bought it. Everyone said it was a lifter..
I just opened up the valve covers to put on my Kool Krane Nuts and found crud built up around the edges and some silver oil  . The passengers side is perfectly clean.I honestly do not know where to start diagnosing this problem. I really could use some good technical advise D@mn am I pissed....... Steve Our hearts and minds are with the thousands of troops in the Middle East who are going into battle, and their families. We wish them all a safe and speedy return.
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#2
03-25-2003, 02:29 PM
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I've had a Tic, Tic, around 5 & 7 in my 389 since I bought it. Everyone said it was a lifter..
I just opened up the valve covers to put on my Kool Krane Nuts and found crud built up around the edges and some silver oil . The passengers side is perfectly clean.I honestly do not know where to start diagnosing this problem. I really could use some good technical advise D@mn am I pissed....... Steve Our hearts and minds are with the thousands of troops in the Middle East who are going into battle, and their families. We wish them all a safe and speedy return.
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#3
03-25-2003, 02:42 PM
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first thing I noticed, where are your guide plates?
Push rods could be rubbing on the head, check for wear on your push rods? Also, the tic tic tic, is it constant? get worse when you rev it up? get worse under deceleration? Just to ease your mind, bearing fragments would have bronze in it! MOTOR CITIES FINEST PHS Documented "REAL JUDGE" 12.53 @ 110.68 on street tires, through the mufflers and a 4 speed!!
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Worlds Fastest Documented GTO JUDGE! |
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#4
03-25-2003, 03:05 PM
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Yes, the tic is always there and seems to be getting worse.
As far as accelerating or deceleration I haven't notice a dramatic difference. I was under the car today while it was running and could hear the tic through the exhaust pipe, that is what erked me to install the new kool nuts. Guideplates were not there when I bought the car, should I start looking for a set???. The motor had just been done for 3K by the previous owner and it has less than 1K miles since that. Where do I start diagnosing this problem?? Thanks Our hearts and minds are with the thousands of troops in the Middle East who are going into battle, and their families. We wish them all a safe and speedy return.
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#5
03-25-2003, 03:08 PM
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66 model heads do not have guide plates. My guess is bad lifter or lifters or flat cam lobe or lobes.
wanna race? gimmie the move--
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 1963 Cat SD Clone (old school) streeter 1964 GTO post coupe, tripower, 4speed (build) 1965 GTO 389 tripower, 4 speed, driver 1966 GTO dragcar 1966 GTO Ragtop 1969 Tempest ET clone street/strip 1969 GTO Judge RA lll, auto 1969 GTO limelight Conv. 4speed go and show (sold) 1970 GP SSJ 1970 GTO barn find..TLB…390 horse?….yeh, 390 1972 GTO 455 HO, 4 speed, (build) 1973 Grand Safari wagon, 700hp stoplight sleeper 525ci DCI & 609ci LM V head builds |
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#6
03-25-2003, 03:18 PM
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OK, I've never performed this kind of surgery, but I'm no coward
 .I guess any way I look at this the intake has to come off. Is this a good place to start?? Pull the rocker nuts and check the push rods?? As I take this apart, can the rods, rockers, springs,nuts and such be mixed or store them separately per cylinder?? HMmmmmmmmmmmmmm.......... D@mnit..... Our hearts and minds are with the thousands of troops in the Middle East who are going into battle, and their families. We wish them all a safe and speedy return.
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#7
03-25-2003, 04:13 PM
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First rotate the engine over with the valve covers off to see if you have a rocker arm not going up as far as the rest are. if so you have found a problem :P pull that lifter and check it out, if its not bad pull cam and have it checked.
Check push rods while your in there. Mike |
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#8
03-25-2003, 05:52 PM
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Another thing to check before you dive into the motor are the rocker arm studs. On the early heads they used pressed in studs not screw in, see if they are pulling out by measuring there length and compare to a known good stud.
with out questions there can be no answers 1969 Grand Prix 9.947@133.53(1.358) 6.246@107.91(1.342) WARPed Tepee Forums alex@pontiacgroup.com
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1994 Formula 535ci NA CV-1 - single 1050 with c14 - 940hp@7000/825tq@5200 Pontiac Powered 4th Gen Project Progress 
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#9
03-25-2003, 06:52 PM
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65 TOPLESS,
Here are some ideas for you to try:Find a doctor's stethascope and listen thru the valve cover(with engine running)...Take off cover and look at the valve lash,loose rockers,check them all?Look at valve springs and shims,studs and pushrods..here's a little tip; place a strong but small magnet At each end of the head so all oil has to drain by the magnet and will pick-off the metal ??? If you can't find make sure you drain the oil & filter..I think you will find something rubbing or a valve shim that is wearing..Hope this helps....Dave...1033/stock
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#10
03-25-2003, 07:20 PM
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65 Topless, DO THIS.... run it without the cover on. When idling check out the rocker travel on the holes youv'e isolated the noise to. All else fails (usually does) grab ahold of the rockers in question with your hand (yes while running). Just keeep your fingers out of the way of springs, etc. See if you can feel something loose, or if the noise changes. Try pushing down on the rockers in ?. What your trying to do is isolate the probelm down...then address it
"mean" |
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#11
03-25-2003, 07:55 PM
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Thank you Gentlemen for the replies.....
In the morning I will try to identify the suspect lifter, push rod, etc..... Also, From what I gather from you guy's is that I may not be totally screwed, just because there are some VERY fine shavings under the 1,3,5,7 valve cover ??? The oil is clean ( dipstick ) and the passengers side 2,4,6,8 looks good? Thanks Our hearts and minds are with the thousands of troops in the Middle East who are going into battle, and their families. We wish them all a safe and speedy return.
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#12
03-26-2003, 04:58 AM
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You need to cut the filter open & inspect it for damage. If you find bearing material in the filter you have problems unless its a very small amount.
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#13
03-26-2003, 05:53 AM
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I had a tictictic once, they sent me to the nut Dr. and he fixed it.
 BIGGERISBETTER-15 yrs in NHRA tech ret.
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NHRA tech. "Its just a 412, I swear it". Pontiac tip of the year, quit those damn cigarettes. 
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