Oil pressure down + toc -cloc-toc-cloc HELP!!!!!!
 

Yesterday i noticed that my oil pressure was boucing , it was at normal pressure but always moving like 1-2 millimeter..bouncing...

Today at like 4 minutes from where i live, comin back home after work, i noticed that my gauge was bouncing again, then at accelerate in first, not at WOT but just to get a little boost and then i heard a little clunk-cloc, higher the engine is reving, faster it do that:
toc-cloc-toc-cloc-toc-cloc...
It was worst and worst in the 4 minutes remaining to get home, i tried to get home at idle speed...
I noticed that my oil pressure is now very low and bouncing, back home i opened the hood and the sound is coming from where the harmonic balancer is,

In december my crank shaft sensor behind the harmonic balancer has been changed
My mechanic did the repair but i think he didnt tight the bolt at 110 with the torque wrench, only with the impact gun.

Im wondering if it can be that, or that my harmonic balancer need replacement??


But why im getting low pressure ??
No smoke coming out of my exhaust and it idle fine and seem to accelerate smooth.

Please tell me that my engine is not dead :cry:

I only got 2 month without any issue then now im ready again to hit my car in a wall :?

:help:

and some days ago, i noticed that my engine was vibrating at a certain rpm.(a small amount of vibration but still anormal i think.)

Not like a bad valve sound but like something is unbalanced.

edit: i just verified, i dont had lost any oil, and no apparant leak, i restarted the car and the sound is clearly coming from one of the pulley close to the harmonic balancer, sometime it sound like metal on metal.

Assuming your oil level is fine then my guess is a bad oil pump, or sending unit which may be the cause of your tic tocking. Could either be lifters which aren't pumping up or a possible spun bearing due to not enough lubrication. These are only guesses though and you want to have it towed to a shop for evaluation (I wouldnt drive it).

Oil pump look to be a good starting point.

Can it make noise like that when broken?


Im sure its not my lifter, i already had gummed lifter a while ago when my intake gasket was bad and it isnt the same thing and the sound is coming from the very bottom of the engine.

thx rogue

sure it isnt harmonic

Get it towed to the guy that worked on it before. Have him make sure the harmonic balancer is tight, and then hook up an external oil pressure gauge to see what the oil pressure is if the noise is still there. If its not the harmonic balancer I would guess oil pump like rogue said which means you probably spun a bearing if its making a knocking noise.

Shawn

When you say spun a bearing , what it mean, and what is involved?
part to change, what to remove, cost?

thx guys. :cry:

From your description I'm on the spun bearing side of the wall also.

Spun bearing is what you don't want to hear Mike. The bearing between the pistion rod and crank is worn down, shot and the clunking you hear (if spun bearing) would be the rod and crank smacking together as the engine runs. Low oil pressure is directly related since the bearing is gone and the tolerance in space are now great oil is freely pouring out and there is not enough pressure to maintain the amount needed for the other bearings not to wear out.

If it is a spun bearing, it will be cheaper to put in a used motor then to repair it unless you are doing all the labor yourself in which case I would still put in a used motor as its a PITA to have to pull the pistons and redo the bearings and even then you would want a machine shop to check tolerances etc...its bad all the way around.

I hope its not the case for you, but I fear it is. Another possibility is you may have broken a pump shaft in the trans and the clunking could be a dry converter (as fluid is not moving around in the trans) but if that were the case I would think you would have drive problems.

May also be a cracked flexplate. There are so many things, I wouldn't even begin to try and guess. Your best bet is to get it to a mechanic.

I called the dealer today, he think main bearing. Or spun bearing...


the sound is coming from the really bottom of the engine.
It really sound like a bad bearing running metal on metal(sometime) + the knocking sound.

I still have a warranty, i can swap to my original intake system but i have a solid front motor mount, i hope it will pass. (its not a dealer warranty but this dealer trade with the warranty...)

I dont feel very good right now. :cry:

Already putted like 2300$ in 2 year since i have this car. Just in repair, not including maintenance like 3 bearing etc...

My car is aunted

Is that like nephewed?

Mike...the dealer will do a new motor? Awesome!!!

Thats the only good point i see right now,if my warranty accept to pay the repair ill have a new engine.

If not, my wallet will be xxxx$ lighter. :cry:

Hope it works out Mike. On the motor mount...say that was there when you got it...play dumb if you can. Or spend the money...get the right one and get it through warranty.

Mike,

What is that accent you speak with? :D

montreal, Canada


What accent, EH!

Thx billboost :)

Mcdrive, my first language is french, i learned english in highschool and practice on the net when posting and reading, im 26 now so highschool is far away.

Just try to answer me..

"Salut macdrive, quoi de neuf, comprend tu un seul mot que j'écrit?"

sometimes its hard for me to find specific words or even abreviations, like
FWI, FYI, TB, etc.. nobody explained me what they are, i found it by myself trying to understand what people were talking about.

sorry if sometime its hard to understand, im doing the best i can.

silly online translator says

"Do hello macdrive, what is nine, include/understand you only one word that I writes?"

:lol:

Ill translate with english expressions , term.
"Hi macdrive, wassup, can you understand what im writing?"

Mike,

So you're one of those romantic French'eez huh?

Are you too young to remember Pepe Le Pew? He was a Warner Bros. cartoon character.

He was a French skunk that would go around chasing this cat whom he thought was a female skunk; but was actually a female cat whom had white paint poured down her back.

Pepe didn't know she was a cat with white paint poured down her back. So then he would always try to catch her and give her kisses and smooches while she was desperately trying to get away from him.

My favorite cartoon character. :lol:

http://www.zewebanim.com/images/Loon...epe-le-pew.gif

Yep, remember it in Bugs bunny.

Back to main subject, will bring the car to dealer early next week for the evaluation of damage and warranty approval. :?

If the warranty dont want to pay, ill probably bring the car elsewhere and put in a cam and headers while the engine is out, that way i will put my 3.25 pulley sitting in my trunk.
I will have no other better oportunity to install headers.

I will get the car towed to the dealer tomorow morning, then i will be fix on the exact problem.

5 days now without driving my bonne... too long :cry:
without driving at all, i will have a pontiac Sunfire tomorow :twisted: ...... :roll: from the dealer.

They take the engine out today, the warranty looked at the engine and they will pay for the repair,
in fact, the dealer will install a used engine, the only thing that will remain from my old engine will be the supercharger,

they will get the engine tomorow so next monday i should get my car back!!! :P


And it will only cost me the supercharger gasket and liquids...coolant, oil...
So im not gonna mod it soon, only rocker and ported manifold this spring + PCM.

There was one bearing with lot of wear, the others one looked fine.


:flashbounce:

great news, i bet you are VERY happy that it is getting taken care of properly

Be sure they change the oil pump if that was the cause of it all :)

Great news!

I have my car back!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! finally

cost me 330$ :D


Mileage goes from 16 Liter/100km to 10 liter/100 km !!!

But, my tank was at 1/4 since my engine broke, 3 week and a half with -15 to 8 * celcius.

Today, starting from the dealer i noticed the rpm was boucing a the stop light, right when the car stop, i was like " may be the PCM is adjusting"

So i returned to work, later afetr work, i started the car to show my new engine to a friend , and after 15 secondee it begun to bounce again, and finaly the engine stopped.

I was like " Huh??!?" and my friend was laughing at me...


So i decided to go home but the car started to lost power after only 100m and die.

3 time, so i let my car at the shop, im thinking thats may be water in the fuel tank,
what do you guys think?


Im going right now to put some gaz in the tank, the highest octane possible, 94-95 i think.


Other than that it seem fine. Run great.

And i have my 3.4 with stock air box (because of my warranty)
and its very humid outside.


:nonono:

What does your volt gauge read?

May also be a vacuum leak.

Im bringing the car back to dealer tomorow ( they will have to tow it)


I will call them tomorow morning,im sure its nothing (thx warranty) but its still frustrating, ive been waiting 3 weeks and i have to get it back after 3 hours... :x


back with news tomorow.

Thx Rogue

Back from the dealer, turned out to be the O2 sensor :shock:

Car run fine now, but i he said my other O2 sensor behind the cat is bad too, he said its because of my highflow cat... wich i cant believe, and he said my engine broke down because of that , and that my new engine can brake because of that too, he suggest me to change back to original...

He suggest me to begin with the cat, i suggest him to just replace my front O2 sensor, its fine now. But he put doub t in my mine,.... I tought the rear O2 sensor wasnt sending info for the air/fuel mix?? only the front, he said the 2 had conflict or something like that

Can a highflow cat cause spun bearing failure??? i tought we could run "open exhaust " if wanted..

Anyway, had also a purge valve code in the tank, 30$ part wich will be replace soon.



Mileage increased 8.5liter/100km like 27 mile/gallon 2 time better than my old engine.

He said to me to hurry because my O2 will fail soon due to my Cat.. true?? :?

Your rear 02 does not affect fuelng in any way. It's only job is to see if the cat is doing its job or not. More than likely your hi-flo cat is not efficient enough for the 02 to read it as performing its job correctly. You can either install an 02 simulator in place of the rear 02 sensor or have the code removed from your PCM.

In either case a hi-flo cat will NOT cause a bearing to spin. More than likely they damaged the 02 sensor putting your new engine back in (wires on manifolds, or damaged the 02 physically).

Thats what i was hoping , i think i will order my O2 simulator now. :D

Thank you very much Rogue ;)