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#1
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need help on a 89 blazer 4.3
i have an 89 blazer with the 4.3. it has a tick that is driving me nuts. i thought it was the timing chain and changed that and the lifters it is still there. it is a tick and doesnt sound like a rod knock. if i put it in gear and power brake a little i cant hear the tick. at idle i hear it pretty good. the oil pressure is 25-30 at idle. any ideas?
thanks bryan |
#2
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Lifter?
Mike
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so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
#3
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cracked manifold or exaust leak ....
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#4
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Cam. you said you changed the lifters.
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#5
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Might be a crack in the flex plate?
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Go Fast... Return... Go Fast Again... Who cares about left turns??? |
#6
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#7
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I believe some of those had sloppy rod/ wrist pin fit. I used to work at a Chev. dealership
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#8
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4.3
thanks for the replies, the lifters are new, the flexplate is also new, it had a spot where the teeth were missing and it wouldnt engage the starter, i dont think its an exhaust leak, cam is a possibility. wrist pin hmmm. i forgot to mention that it is sporatic. sometimes when i start it it doesnt make the noise even at idle. but once it starts it stays. would wrist pin or cam fit this pattern?
thanks bryan |
#9
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Seems like I remember another issue of pistons being undersize. Can't really remember, it's been quite a few years
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#10
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Your right. But also the fuel lines run up the trans tunnel and make a loud ticking noise. I remember when they first started putting the 4.3 in them we had sold one new and the customer brought it back complaining about the ticking noise. That is just a carrieristic of the beast. How long have you owned this blazer? Did this noise just start or has it always been there? The reason I ask that is you may have disturbed the fuel lines while working on the engine.
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69 GTO Judge 69 Firebird Trans Am clone 76 Trans Am 400 4spd. 06 GTO M6 18's red/red - 1 OF 188. 09.5 G8 GT Stryker blue met. premium with sport pkg. |
#11
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Great engine but hey it's an 89. Rather than buying a bunch of parts chasing some little noise that won't go away, buy a louder radio and drive it til it dies!
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#12
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I've also seen Idler pulleys make this type of noise. They normally don't come and go tho.
__________________
so many pontiacs, so little time.................. moderator is a glorified word for an unappreciated prick.................. "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." --Albert Einstein "There is no such thing as a good tax." "We contend that for a nation to tax itself into prosperity is like a man standing in a bucket and trying to lift himself up by the handle." - Winston Churchill |
#13
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Did they teach you that when you change the lifters you change the cam also? They do go hand on hand right?
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#14
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From the new parts you installed, sounds like your removed the engine or trans (flexplate replacement)?
I recall the exhaust pipe to manifold donut sealing being a bear to seat from time to time. Used to take a brass drift against the flange and hit it with a hammer to seat the donut. Depending on how warm or cold it is when you start it, the noise will vary. If you wanted to check for an exhaust leak quick, drop a couple of splashes of trans fluid down the throttle body while it is idling. The smoke will come out the areas where it is leaking.
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"My ol' man is a television repairman...he has an ultimate set of tools!....I can fix it..." J. Spicholi |
#15
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4.3 noise
i checked again to be sure its not an exhaust leak, its not. i ran it without the belt and it still makes the noise. i know i should be slapped for not changing the cam at the time i changed the lifters but i thought one was not pumping up or something like that.they have rollers on them and there was not any visible wear. at one time this was my fathers blazer and he had a new shortblock installed. i think it has about 50-60 k on the shortblock. im thinking about the wrist pin or piston slap. oh the stereo turned up does work well... i think ill wait untill whatever it is breaks
thanks bryan |
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