jsup wrote:
I think I'm right, I blew the cats.

Consider this:

1. The last injectors I had were marked wrong, they were marked 40, not 37 and my FP was a bit high, the car had gas dumped all over the place.

2. My heated O2 sensor wasn't working right, it was reading lean when it wasn't. Therefore, it was dumping fuel.

I believe gas probably piled up in the cats, and blew today. Therefore blowing the cats up internally, cloging the exhaust.

Backpressure would explain the high engine heat too.

As for the valve tap, it's not really that bad, slight adjustment. It was doing it before the problem anyway.

So I suspect that the shit in the cats is now logdged sideways somewhere in the exhaust.

Comments?

Mekanic wrote:
Quote:

jsup wrote:
I think I'm right, I blew the cats.

Consider this:

1. The last injectors I had were marked wrong, they were marked 40, not 37 and my FP was a bit high, the car had gas dumped all over the place.

2. My heated O2 sensor wasn't working right, it was reading lean when it wasn't. Therefore, it was dumping fuel.

I believe gas probably piled up in the cats, and blew today. Therefore blowing the cats up internally, cloging the exhaust.

Backpressure would explain the high engine heat too.

As for the valve tap, it's not really that bad, slight adjustment. It was doing it before the problem anyway.

So I suspect that the shit in the cats is now logdged sideways somewhere in the exhaust.

Comments?

Sounds right to me, and the valve tap or lifter noise could be attributed to the blown cats adding all kinds of back pressure.

jsup wrote:
Quote:

Mekanic wrote:
Quote:

jsup wrote:
I think I'm right, I blew the cats.

Consider this:

1. The last injectors I had were marked wrong, they were marked 40, not 37 and my FP was a bit high, the car had gas dumped all over the place.

2. My heated O2 sensor wasn't working right, it was reading lean when it wasn't. Therefore, it was dumping fuel.

I believe gas probably piled up in the cats, and blew today. Therefore blowing the cats up internally, cloging the exhaust.

Backpressure would explain the high engine heat too.

As for the valve tap, it's not really that bad, slight adjustment. It was doing it before the problem anyway.

So I suspect that the shit in the cats is now logdged sideways somewhere in the exhaust.

Comments?

Sounds right to me, and the valve tap or lifter noise could be attributed to the blown cats adding all kinds of back pressure.

I don't think there's any damage, you? on the valve tap.

Mekanic wrote:
Quote:

jsup wrote:
Quote:

Mekanic wrote:
[quote]
jsup wrote:
I think I'm right, I blew the cats.

Consider this:

1. The last injectors I had were marked wrong, they were marked 40, not 37 and my FP was a bit high, the car had gas dumped all over the place.

2. My heated O2 sensor wasn't working right, it was reading lean when it wasn't. Therefore, it was dumping fuel.

I believe gas probably piled up in the cats, and blew today. Therefore blowing the cats up internally, cloging the exhaust.

Backpressure would explain the high engine heat too.

As for the valve tap, it's not really that bad, slight adjustment. It was doing it before the problem anyway.

So I suspect that the shit in the cats is now logdged sideways somewhere in the exhaust.

Comments?

Sounds right to me, and the valve tap or lifter noise could be attributed to the blown cats adding all kinds of back pressure.

I don't think there's any damage, you? on the valve tap.

bogus wrote:
John,

That oil temp is WAY too high. I mean WAY TOO HIGH.

Something isn't right. Have you put a known mechanical oil pressure gauge on that engine? Generally speaking, I am worried for that bottom end.

Rip those fuggers out and replace with a test pipe, and ride on!

SpeedHound wrote:
I think you may be right about the cats or it could be a baffle in the mufflers. As for the ticking, are you sure you're not just hearing normal header noise? Headers allow you to hear the valve train more so.

dan0617 wrote:
I'm sorry to hear about all your trouble. I must be the luckiest bastard ever. I did a cam, heads, hsr intake, small cap dist., timing chain, injectors, and lots of other stuff this winter. Had some fitment issues and such but took my time and worked through it all. After assembly and dialing in I haven't had any problems, not even a leak. Haven't had the valve covers back off or anything. My tune needs a fine tuning but it is amazingly close to perfect. On the lifters, I found 0 lash while the intake was off and I could see the lifters. I then went about 3/4 turn past 0 lash and that was it. No valve tap or anything. I re-used the stock lifters. I wish I could help you more. Hang in there, it will come around for you.

B1ack86v3tt3 wrote:
Quote:

Mekanic wrote:
Quote:

jsup wrote:
Quote:

Mekanic wrote:
Quote:

jsup wrote:
I think I'm right, I blew the cats.

Consider this:

1. The last injectors I had were marked wrong, they were marked 40, not 37 and my FP was a bit high, the car had gas dumped all over the place.

2. My heated O2 sensor wasn't working right, it was reading lean when it wasn't. Therefore, it was dumping fuel.

I believe gas probably piled up in the cats, and blew today. Therefore blowing the cats up internally, cloging the exhaust.

Backpressure would explain the high engine heat too.

As for the valve tap, it's not really that bad, slight adjustment. It was doing it before the problem anyway.

So I suspect that the shit in the cats is now logdged sideways somewhere in the exhaust.

Comments?

Sounds right to me, and the valve tap or lifter noise could be attributed to the blown cats adding all kinds of back pressure.

I don't think there's any damage, you? on the valve tap.

I seriously doubt it with how little it has been driven since the cats popped.

Rip those fuggers out and replace with a test pipe, and ride on![/[/Rip those fuggers out and replace with a test pipe, and ride on![/Rip those fuggers out and replace with a test pipe, and ride on![/

:goodpost:

jsup wrote:
It wasn't the cats, the cats were fine.

The two valves on #8 are way out of adjustment.

how does that happen?

bogus wrote:
Quote:

jsup wrote:
It wasn't the cats, the cats were fine.

The two valves on #8 are way out of adjustment.

how does that happen?

I find that settings like this will work out of adjustment a couple of times before they are tightened perfectly. Vibration, heat cycling... things like that will get you. Then again, a slightly loose adjustment bolt will do it too.

That explains the valve tap, not the oil temps.... what did you learn cutting into the oil filter?

bogus wrote:
I figured if you had gotten as far as doing the valve adjustment, the oil filter was doable...

toptechx6 wrote:
You can remove #2 from the list, that might cause oil consumption, but isn't going to cause loss of oil pressure.

CasetheCorvetteman wrote:
You can can number 3 too i reckon, you wouldnt get good pressure when cold and none when hot if the pickup came out, unless you sump is getting low when the oil heats up.

Have you checked under the filler cap to see that all your oil isnt staying up there and not draining back? Might be a very very long shot, but anything is worth a look at this stage.

CasetheCorvetteman wrote:
If the oil pump was sucking air when cold, it wouldnt suck any oil, cause itll suck up what ever is easiest. Cold oil wont be as easy to suck up as either hot oil, or crank case air.

Unseated rings wont cause this issue, and yoube be blowing a heap of smoke if they hadnt seated.

Id also think youd be seeing high coolant temps if indeed you were getting excess bore friction, and probably more so then high oil temps.

Does this think have a block heater or oil cooler? I havent seen a block heater on a Corvette, so i dont know if they run on single phase mains power or 12vdc.

What does a compression test tell you?

I've lost track of what you said the oil pressure drops to, but no matter. Number 2, "the valves get loud.", gives me a yet to be mentioned thought. My worn out Crossfire has a quiet valve train on thin oil at less than 10 psi oil pressure. It doesn't take a lot of pressure to keep hydraulic lifters happy. My 400 with the high volume oil pump with the pressure relief spring shimmed (I out smarted myself on THAT one), the one that almost never saw less than 50 psi oil pressure, would run out of oil in the pan cruising at 70 mph (3500 rpms). I'm not suggesting that your pump is pumping your pan dry at idle speeds or in "test mode", but especially since the pan has been off recently, possibly the oil pump pick up has fallen off or is sucking air. Air in the oil would explain valve train noise. The pressure would read artificially low because, unlike the oil (a liquid) the air in the system can be compressed, resulting in lower readings. Ask anesthesia about Boyles Laws of Gasoline. He knows all about compressing liquids.

I'm not saying that this HAS to be the problem, but I think it is a valid enough possibility to warrant pulling the pan. Remember, 99 and 44 one hundredths percent (99.44%) of the problems we deal with are the off shoot of the LAST problem we dealt with. The ball is in your court.

RACE ON!!!
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CasetheCorvetteman wrote:
If the oil pump was sucking air when cold, it wouldnt suck any oil, cause itll suck up what ever is easiest. Cold oil wont be as easy to suck up as either hot oil, or crank case air.

Unseated rings wont cause this issue, and yoube be blowing a heap of smoke if they hadnt seated.

Id also think youd be seeing high coolant temps if indeed you were getting excess bore friction, and probably more so then high oil temps.

Does this think have a block heater or oil cooler? I havent seen a block heater on a Corvette, so i dont know if they run on single phase mains power or 12vdc.

What does a compression test tell you?

jsup wrote:
Quote:

toptechx6 wrote:
You can remove #2 from the list, that might cause oil consumption, but isn't going to cause loss of oil pressure.

HEAT is causing loss of pressure. Perhaps the rings are causing the heat if they haven't seated.

The problem is heat, then loss of OP. Not loss of OP without heat.

toptechx6 wrote:
Fairy tale.

LD85 wrote:
Do you have a stud with a nut holding the pump on, if not, get one.

jsup wrote:
Quote:

LD85 wrote:
Do you have a stud with a nut holding the pump on, if not, get one.

It's a stock pump. I am ready to take recommendations. Thanks.

I'm not quite sure what you mean by a stud with a nut. Now, I know what a stud and nut is, but are you saying in place of the bolts that hold it up?

LD85 wrote:
Quote:

jsup wrote:
Quote:

LD85 wrote:
Do you have a stud with a nut holding the pump on, if not, get one.

It's a stock pump. I am ready to take recommendations. Thanks.

I'm not quite sure what you mean by a stud with a nut. Now, I know what a stud and nut is, but are you saying in place of the bolts that hold it up?

Sometimes a Bolt will bottom out in the oil pump mount hole, so you use a threaded stud with a nut to hold the pump on and insure that the pump is on tight

LD85 wrote:
How many quarts does your pan hold, if it is stock size, I would stay with the stock pump

CasetheCorvetteman wrote:
The problem with a higher volume pump is that youll end up with the oil all pumped to the top of the engine and the sump will run low. Especially if youre running such thick oil in it.

CasetheCorvetteman wrote:
The problem with a higher volume pump is that youll end up with the oil all pumped to the top of the engine and the sump will run low. Especially if youre running such thick oil in it.

toptechx6 wrote:
I have all fingers crossed for you man, trying a new oil pump is a good place to start, hope it is the end of your nightmare.

Qack wrote:
I certainly can't add anything meaningful to this discussion, and I'm sorry to hear about your problem JSUP. However, I am learning a whole lot while reading the replies and exchange of ideas. It's a great education -- one I do hope I never have to apply to my own car!

Thanks,

Qack

toptechx6 wrote:
Damn, that sucks. I assume you mean a main and not a rod bearing? Either one is bad of course but a crankshaft and a rod is better than an engine.
Good luck whichever way you decide to go, definitely time to think about a stroker.

jsup wrote:
That's why I post these things, for the education.

Sometimes I feel like an idiot, here's something else wrong, or I changd my mind, or whatever, but I believe the educational value outweighs my looking stupid.

And believe me, I do feel stupid from time to time.

TommyT-Bone wrote:
Quote:

jsup wrote:
That's why I post these things, for the education.

Sometimes I feel like an idiot, here's something else wrong, or I changd my mind, or whatever, but I believe the educational value outweighs my looking stupid.

And believe me, I do feel stupid from time to time.

You are not alone.