Cold start tapping/knocking...uh oh....

davidtt87

Smaat Noob
Apr 4, 2005
23
0
0
37
Pembroke NH
do not switch the oil, it will only make the oil move slower and get to the bearings slower on cold starts. to see if it is rod knock the only way is to slowly hold revs until you hear knocking and unplug spark plusg one by one until the sound goes away. this is easiest way for me to tell without a scope.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
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johnathan1 said:
well said ^^

Figit: If you don't plan on staying with the Supra long term, then don't waste our time, and I'm trying hard not to be a jerk ;). If you want to stay with the Supra, you have to recognise that it is quite old, and as any other car would be, is prone to age-related issues...oh, and the Head gasket....

I apologise if anyone felt i was waisting their time...i tend to get a bit ahead of myself sometimes. I have no intention of getting rid of my supra for a long time, the engine would be more likely to change but i just see all the swaps happening and get anxious, along with the tapping and thought of a rod knock...then i think of just saving money for a new engine, but then that makes me think of just saving a bit more for a whole new car WITH the engine already in. But i have a perfectly good car right now and thats kinda silly.

Supramacist: yeah, i have most tools needed but precision engine tools i dont have. I have PLEANTY of the tools needed to take apart and put my car together, i just dont have some of the reccomended calibration tools that mechanics have. I will buy those as needed. Good heads up though..and thanks. I keep a full tool set in my car.

I know my car is old, and as such more matenince is a given and i knew that when I picked her up.... its just the rod knock... I'll admit right now I dont know a TON about the tolerances of vehicles as of yet, but i know how they work for the most part, you get the idea...

with that said, i was just thinking a rod knock would be a mileage related issue because the engine is a rather sealed environment and unless there is some synthetic in the works i wouldnt think that bad bearings would be a problem unless the car was abused. that could be the case though. I'll just take everybodys advice and hope for the best :) . I'm going to do more searches with the info i have now to find out more about the oil blockage when i get a chance...i'll try and post it if i get the info because it seems others have the issue. I heard it again a bit ago when i started it up, but not as violent as before.... we'll see what happens.



edit-----
davidtt87 said:
do not switch the oil, it will only make the oil move slower and get to the bearings slower on cold starts. to see if it is rod knock the only way is to slowly hold revs until you hear knocking and unplug spark plusg one by one until the sound goes away. this is easiest way for me to tell without a scope.

thanks...i'll probably try that if i find a RPM that i can hear it.
 

johnathan1

Supra =
Aug 19, 2005
5,056
1
36
36
Downey, California, United States
i doubt that it's rodknock, if it were, wouldn't the noise be constant? I am guessing it's just a worn cam lobe (or bearing) around cyl 5 or 6, caused by a lack of oil and because of the extra clearance it will move slightly and tap either the shim, or more likely tapping the cam against a bearing when there is little or no oil present (i.e. cold starts), then goes away once oil is present (a few secs after initial cold start) If it were ME, I wouldn't get all freaked out and panicky about it...It's not worth your sanity ;) Maybe try checking your cam bearing clearances...but before that, do the old "unplug the injector connectors one at a time" and if you hear the sound go away, then it's rodknock.

Also, I'm sorry if I was a dick, I just get all bent out of shape when people talk about abandoning a Supra, I guess I missunderstood what you said.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
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.....well i said it in such a way that even i would have figured that probably if i had been the reader...and i can understand. thanks. I'm actually hoping I can keep it in good enough condition to keep it with no intention of selling...it's already older than me so why not keep it until it's a collectable car? I dont know how practical that is but whatever...i like it... I dont know if there is anything unique about it or special compared to other supras, or if the fact that it's the first edition makes any difference... but it looks nice :)
 

supramacist

Banned
Apr 8, 2006
1,501
0
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The Grassy Knole
So you're what 19? 20? I think what you need is another one. That way when one breaks down you can drive the supra you just finished working on for a couple of weeks till the other one you just finished working on has to be used because the one you just finished working on is broken down again.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
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haha...good idea but no...i'd have to keep switching insurance. I canNOT afford both. but i AM looking for another, but i would not drive both regulerly... and i would only buy an mgte in good condition...i want to find one with a great body, or at least one without rust or dents or broken parts... my trim is a little odd becuase she used to be grey i think and it's been repainted. not to mention some dope bolted the fender on wrong and i have to fix that because the bottom trim doesn't fit right in front of my door....but yeah. i'm keeping an eye out but for now this one is serving me well. i'm going to flush the radiator today and get rid of airbubbles when i refill....hopefully all goes well.

17..18 soonish.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
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supramacist said:
I like your style there fig.

?????


in response to the previous minute's post, i can't do that because the turbo didn't exist yet....:3d_frown:


but yeah, the plate thing might work. if anything i can say i was working on my car and accidentally switched plates.... and then if the issue of why i only have insureance for one but drive both comes up i'll just say i love them so much i cant tell them apart....and got in the wrong one :p


oh and on a side note...how the heck to signatures decide when to show up and dissapear? sometimes only select posts of mine in a thread show my pic...and just now when i edited this a second ago there wasn't a signature...now it's there...what gives?
 

Fuzz420

Are U Here 2 take My Baby
If u think its indeed rodknock and you still have to drive, run some of that lucas oil stuff.I ran my old motor into the ground and that the only thing i can think of that would made it run as long as it did. For reference i got rodknock 1 month after owning and then drove it 23k miles over the next 9 months before she went boom
 

supramacist

Banned
Apr 8, 2006
1,501
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Lucas has been around for a long long time. I tried there injection(fuel) cleaner. it worked well. But as far as fuel inj. goes...., get a quart of transmission fluid and add to a very low tank of gas. you'll be surprised at the responce..., even with 87oct.

and yes..., I know it's off topic. But it's a good tip.
 

davidtt87

Smaat Noob
Apr 4, 2005
23
0
0
37
Pembroke NH
yeah the lucas stuff is good but not in cold climates the oil test in sf shows what some oil combined with lucas did, it like froze in the fridge lmao. but other than that its great stuff.
 

supramacist

Banned
Apr 8, 2006
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The Grassy Knole
ya....., if people where you live play hockey instead of baseball......., you might want to stay away from some of the product. But that's all I have ever herd that was bad about it. And to be honest I have herd more about Jimmy Page worshiping the devil than I have bad things about lucas.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
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lol....

freezing in the fridge?? shoot... i keep my car in the garage but no oil that freezes is worth it's dry-start prevention capabilities. I live in Nor Cal and it gets pretty cold here, enough to frost the dew some nights. I could go for it in the summer but you never know. I keep my car in the garage though so maybe it'd be ok. I'd like to know exactly what temp it freezes...then i could decide.
 

supramacist

Banned
Apr 8, 2006
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The Grassy Knole
that's only the second time I had herd that ever. and if it was a test there is no telling how cold they had to get it to make it freeze. I have been up into tahoe and reno nevada. I used to live in so. cal.
 

Figit090

Fastest mk3 GT4 1/4 mile!
Jan 7, 2006
1,835
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Humboldt County
ok, i'll look more into it...i think i might get some...

does this stuff also help if you're burning oil? we have this lawn tractor that blows a horendous cloud of oil smoke out when you start it up or punch the throttle and if it could fix that and you've experianced it's effects on the smoling lemmie know! We need something that does great on smoking, this sucker puffs like a steam engine sometimes. :D