Need help from experienced owners

J

Jeasen

Member
I have owned my 1992 Typhoon for more than a year but did not drive it do to a oil leak at lines to remote oil filter. I got the leaks fixed and have been driving it off and on for a couple of weeks. I adjusted the tps voltage and set the timing. The truck was running great and would boost to 5# when I stepped on it a little harder than normal. The other day I decided to step on it a little harder in 3rd gear. The boost went right up to 10#s and then I heard a noise. The noise could have been detonation but not sure. I lifted immediately. I looked out the rear view mirror and saw that I was putting out a white smoke screen from the exhaust. I mean thick white smoke. The motor died and I pulled over to the side of the road. It even puffed white smoke when I tried to restart it. It never did restart. I had it towed home.
My first thought was head gaskets. I changed several on my GN Buick so I know the drill. I pulled the intake and could see that the head gaskets appear to be solid steel (maybe cometic gaskets) so I did not pull the heads. I started looking at the intake and could see beads of coolant in the upper plenum. The lower intake ports looked normal as well as the ports in the heads. The radiatior was way low on coolant and the oil is over full and somewhat milky so the coolant that did not burn went into the crankcase.
I am now suspecting the stock turbo but my turbo guys said the chances of a turbo pumping coolant into an engine is almost non existent
Does anyone have any ideas on what my problem could be? How could the coolant be getting into the intake, cylinders and crankcase? The intake was sealed well to the heads,
 
RealFastV6

RealFastV6

@jb_and_his_coffee
Re: Need help from experienced owners

A couple things...

1. Pull the heads. You at a minimum lost the headgasket - and worst case lost more. Athough the SyTy 4.3 doesn't consume gaskets like the Buick 3.8 (I *ass*u*me* in large part due to having 5 evenly spaced head bolts per cylinder rather than 4 in a rectangle), it's still possible and with your description I'd say it'd say it's a given. It's not the turbo. Any coolant you saw in the upper intake could have been the result of it being drawn back into the plenum by the PCV \ EGR.

2. Was it 10lbs of boost according to the stock gauge or an aftermarket gauge? If it's the factory gauge- the factory gauge is an electronic gauge fed from the ECU, and does not have a reputation for being very accurate.
 
S

Syclone22

Member
Re: Need help from experienced owners

My advice is remove the sparkplugs first numbering
all cylinders so you would not mix them check for
any spots on the plugs like oil or water next do a
cylinder compression check if thats on specs then
remove water to air intercooler and check if that has
any coolant leaks this can cause also a white smoke
it coolant enters the intake manifold .....
 
randy merritt

randy merritt

Donating Member
Re: Need help from experienced owners

Syclone22 said:
My advice is remove the sparkplugs first numbering
all cylinders so you would not mix them check for
any spots on the plugs like oil or water next do a
cylinder compression check if thats on specs then
remove water to air intercooler and check if that has
any coolant leaks this can cause also a white smoke
it coolant enters the intake manifold .....
Click to expand...

Good point. I don't know much about the stock air to water IC on sy/ty's, but I wonder if the "radiator" inside the intercooler has sprung a leak forcing coolant into the intake. That would explain a few things. Just for grins, I would hot wire the IC pump and see if coolant leaks from the IC. My truck makes a disturbing "pop" noise if the compressor side of the turbo piping comes loose. It sounds like the motor just gave it up, and the boost goes to zero. Check for any blowouts of hoses in the compressed air side. I hope it is something simple, and best of luck.
 
Jimmy

Jimmy

Banned
Re: Need help from experienced owners

Pull the oil fill cap off and rev the engine.Tell us what you saw.
 
Icarus-54

Icarus-54

Donating Old Member
Re: Need help from experienced owners

If it was the inner cooler you would'nt have coolant in the oil
 
Jimmy

Jimmy

Banned
Re: Need help from experienced owners

If coolant is in the oil it will look like a chocolate milkshake.

White smoke is prolly blown motor.
 
J

Jeasen

Member
Re: Need help from experienced owners

I want to thank you all for your replies. It is really nice to be a new member and find people that are willing to help, and I mean help not just some smart a** remarks. Thank you.
I did check the turbo with air pressure and it is not the problem. I am going to pull the spark plugs and check them. Also I will check the compression of each cylinder as I pull the plugs.
The intake is still off the motor. I did pull the passenger side valve cover to check what it looked like under neath and everything looked good. The heads are the casting number 10238181 and have been ported. Also the motor has 75# injectors. There is an adjustable fuel pressure regulator and the computer has a moates.net piggy back chip. There is also a second bung and o2 sensor for a wide band air/fuel gague.
The motor has been freshly rebuilt but the guy I bought the truck from only owned it for a short time and could not tell me anything about the build except that it was supposed to have some high performance internals. The truck came out of NE Oklahoma maybe a year and one half ago if anyone might know who owned and built it. I would sure like to talk to the previous owner and builder.
Thanks again for the help, Jeasen
 
randy merritt

randy merritt

Donating Member
Re: Need help from experienced owners

Jeasen said:
I want to thank you all for your replies. It is really nice to be a new member and find people that are willing to help, and I mean help not just some smart a** remarks. Thank you.
I did check the turbo with air pressure and it is not the problem. I am going to pull the spark plugs and check them. Also I will check the compression of each cylinder as I pull the plugs.
The intake is still off the motor. I did pull the passenger side valve cover to check what it looked like under neath and everything looked good. The heads are the casting number 10238181 and have been ported. Also the motor has 75# injectors. There is an adjustable fuel pressure regulator and the computer has a moates.net piggy back chip. There is also a second bung and o2 sensor for a wide band air/fuel gague.
The motor has been freshly rebuilt but the guy I bought the truck from only owned it for a short time and could not tell me anything about the build except that it was supposed to have some high performance internals. The truck came out of NE Oklahoma maybe a year and one half ago if anyone might know who owned and built it. I would sure like to talk to the previous owner and builder.
Thanks again for the help, Jeasen
Click to expand...

I am 99% those are the good L35 heads. The moates inticates you are running a custom tune (either code 58 or 59 tune) because it is a chip emulator. Sounds like that motor has had some attention put into it. On the down side, I blew my stock bottom end motor with vortec heads but running a tune that was not meant for my setup (live and learn). Again, hopefully it is something simple. A good compression check will reveal many things.
 
Jimmy

Jimmy

Banned
Re: Need help from experienced owners

Post up the VIN.

If a midget in a bikini built the motor,well maybe it wasn't built right.

I dunno :dunno:
 
randy merritt

randy merritt

Donating Member
Re: Need help from experienced owners

Jimmy said:
Post up the VIN.

If a midget in a bikini built the motor,well maybe it wasn't built right.

I dunno :dunno:
Click to expand...

My next suggestion exactly. If the head gaskets are MLS ( like Cometic's), I would find it hard to believe they would blow at 10 psi. Back to boost guage maybe being faulty. It should have pulled like a raped ape with the mods you have told if the boost spiked high, though. Hydo lock from intercooler dump?, I dunno, grasping now.
 
johnboy89

johnboy89

Member
Re: Need help from experienced owners

This is what mine looked like after a hole was created!!!

Hopefully yours is nothing like this????

Ha Ha just noticed that my cylinder hole matches my avatar:D

Typhoon009.jpg
[/IMG]
 
S

Syclone22

Member
Re: Need help from experienced owners

johnboy89 said:
This is what mine looked like after a hole was created!!!

Hopefully yours is nothing like this????

Ha Ha just noticed that my cylinder hole matches my avatar:D

Typhoon009.jpg
[/IMG]
Click to expand...

Did the engine have I beam rods must been a lot
of detonation for the rod to spin ..
 
berzerker

berzerker

wookie
Re: Need help from experienced owners

johnboy89 said:
This is what mine looked like after a hole was created!!!

Hopefully yours is nothing like this????

Ha Ha just noticed that my cylinder hole matches my avatar:D

Typhoon009.jpg
[/IMG]
Click to expand...


time for an lsx engine . that's my goal after dealing with the 4.3L turbo's in my trucks .
 
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