Cadillac CTS-V Forum banner

Need advice

2355 Views 45 Replies 10 Participants Last post by  Bluecoupe
Hi all,
14 V with all basic bolt on mods, cam, etc. Did a short street pull and afterwards had what I think is steam coming out of the MM catch can. No milky oil, good oil pressure, nothing out of the exhaust. Intercooler brick seems solid as I pressure tested it. I guess a compression test is next, but why is there nothing coming out of the exhaust? Server won't upload video, but it is basically billowing out of the catch can breather. TIA
1 - 20 of 46 Posts
Hi all,
14 V with all basic bolt on mods, cam, etc. Did a short street pull and afterwards had what I think is steam coming out of the MM catch can. No milky oil, good oil pressure, nothing out of the exhaust. Intercooler brick seems solid as I pressure tested it. I guess a compression test is next, but why is there nothing coming out of the exhaust? Server won't upload video, but it is basically billowing out of the catch can breather. TIA
How is your catch can piped? Is only running to the valley on the supercharger or do you also have a catch can for the heads?
How is your catch can piped? Is only running to the valley on the supercharger or do you also have a catch can for the heads?
3/4 hose from oil filler to can and a smaller hose to blower nipple to can
Hi all,
14 V with all basic bolt on mods, cam, etc. Did a short street pull and afterwards had what I think is steam coming out of the MM catch can. No milky oil, good oil pressure, nothing out of the exhaust. Intercooler brick seems solid as I pressure tested it. I guess a compression test is next, but why is there nothing coming out of the exhaust? Server won't upload video, but it is basically billowing out of the catch can breather. TIA
Oil does not steam, water does!

Put your coolant pressure tester back on, and leave it on for about
a half a day and see what happens.

Then, if you must; drain the oil and look inside the filter.
  • Like
Reactions: 2
Oil does not steam, water does!

Put your coolant pressure tester back on, and leave it on for about
a half a day and see what happens.

Then, if you must; drain the oil and look inside the filter.
I need to get a coolant pressure tester and do as you suggest. I thought for sure it was the brick. I had removed it and put it in water and pressurized it, no bubbles. Leak down test is another thing I should try. I still don't understand why no milkshake in the oil or anything out the exhaust.
I need to get a coolant pressure tester and do as you suggest. I thought for sure it was the brick. I had removed it and put it in water and pressurized it, no bubbles. Leak down test is another thing I should try. I still don't understand why no milkshake in the oil or anything out the exhaust.
From what you have stated, I believe you do have a problem with the brick.
Just a guess though!

Warm the car up, put the pressure tester on it, and let it sit.

If you drain the oil, attempt to only loosen the drain plug, as water will settle on the bottom of the oil pan. Once loosened sufficiently, water will drain out before the oil will.

---------------------------------------------------------

You have owned some nice cars..:)

09 V, silver w/ titanium-ebony interior, auto. 663/700
812 / 885 on a 100 shot!
'72 442 W-30, '72 SS 454 El Camino, '86 T-Type

---------------------------------------------------------

-edit-
Your not by any chance running E85, are you?
See less See more
From what you have stated, I believe you do have a problem with the brick.
Just a guess though!

Warm the car up, put the pressure tester on it, and let it sit.

If you drain the oil, attempt to only loosen the drain plug, as water will settle on the bottom of the oil pan. Once loosened sufficiently, water will drain out before the oil will.

---------------------------------------------------------

You have owned some nice cars..:)

09 V, silver w/ titanium-ebony interior, auto. 663/700
812 / 885 on a 100 shot!
'72 442 W-30, '72 SS 454 El Camino, '86 T-Type

---------------------------------------------------------

-edit-
Your not by any chance running E85, are you?
I drained the brick and disconnected the water lines then fired it up, same thing happens. I am running e85, it was a fresh tank. I have been on e85 for the last 6 years. The only thing that has changed was a transmission rebuild, which is the reason I got on the gas. I wish I could upload the video.

Still have all the cars, lol thank you!
Put it on YouTube and then put the link here.
What does the white smoke smell like? Antifreeze? If not, then it isn't coolant.
I drained the brick and disconnected the water lines then fired it up, same thing happens. I am running e85, it was a fresh tank. I have been on e85 for the last 6 years. The only thing that has changed was a transmission rebuild, which is the reason I got on the gas. I wish I could upload the video.

Still have all the cars, lol thank you!
If the pressure testing continues to show no leak, then I suggest you change the oil and filter.

The negative regarding E85, which is an ethanol, is;
any ethanol (wood or sugar) tends to attract water.

Oil and filter changes must then be completed much more frequently. . . .

Cheers
Thank you all for the advice.
It does smell like coolant, which is why I was certain it was the brick. Definitely not oil. I will try to post a link to the video.
New video by L Sanhz

This is what is coming out of the catch can breather.
Pull the line from the valley port and check for steam. The brick may be good, but the O-rings may be old or damaged.
  • Like
Reactions: 1
Pull the line from the valley port and check for steam. The brick may be good, but the O-rings may be old or damaged.
I will try that. I did disconnect the water lines to the brick and it still had steam though. I will post results tomorrow. Thank you
Update
Pulled the valley port line, same result.
Placed a pressure tester on the coolant reservoir, solid psi reading for a long time.
My friend thought the "steam", smells like ethanol. Kinda what Rubber Duck mentioned. So, how would that much "steam" be created? Could an injector be stuck open? But nothing is coming from the exhaust, oil remains golden, coolant level in reservoir remains steady.
TIA
A stuck injector would generate codes, misfire at a minimum, codes related to running too rich probably, too. You'd get emissions related codes, bad O2 sensor checks, etc..

From your video, that's a huge amount of vapor. Not to mention a lot more pressure venting from the crankcase than I'd expect with the engine at idle. You did a leakdown test and the cooling system was fine. I hate to say it, but I think you need to do a compression check. I'm thinking "rings".
  • Like
Reactions: 2
A stuck injector would generate codes, misfire at a minimum, codes related to running too rich probably, too. You'd get emissions related codes, bad O2 sensor checks, etc..

From your video, that's a huge amount of vapor. Not to mention a lot more pressure venting from the crankcase than I'd expect with the engine at idle. You did a leakdown test and the cooling system was fine. I hate to say it, but I think you need to do a compression check. I'm thinking "rings".
Thank you for the reply
It is showing misfire codes
I'm going to replace the intercooler brick now and fire it up again.
I definitely need to get a compression test done, but wouldn't such show something out of the exhaust?
I have not brought it up to temp because I am afraid of running it that long but the cooling system seems ok
Thank you again
It's not the brick, as it is the same with the new one. :(
Thank you for the reply
It is showing misfire codes
I'm going to replace the intercooler brick now and fire it up again.
I definitely need to get a compression test done, but wouldn't such show something out of the exhaust?
I have not brought it up to temp because I am afraid of running it that long but the cooling system seems ok
Thank you again
I thought you pressure tested your existing brick previously with no leaks, why are you replacing it? Also, did you first try to replace the brick o-rings first?
I thought you pressure tested your existing brick previously with no leaks, why are you replacing it? Also, did you first try to replace the brick o-rings first?
I did pressure test the brick, when I placed it back in the lid, the manifold for the coolant lines was off and I had to pry it over while bolting it in. My friend had an extra brick so I thought I would try it.
I would have bet anything as I was certain it was the brick from the beginning. Just double checking
1 - 20 of 46 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top