Need help crazy water in intake problem..

[Jammon]

Hey I am new to the 240sx realm of things but not new in the engine side of things, hears my problem.. KA24E .. 90 Fastback SE .. 140k miles ...
Takin the head off, intake manifold and everything else in the world that connects to it.. first had head and intake off .. thought it was blown head gasket it was not blown but very old and an issue .. put head back on .. good compression.
then took intake off leavin head .. thought it was seeping water into the first 2 intake ports once hot .. replaced that ..
not that ..
it runs fine while cold . once thermostat opens everytime the engine gets backpressure out through the intake it contains water.. u find water in the intake tubing by the throttle body .. very strange ...
I have a few theories ..
Cracked head.. Cracked block.
something to do with thermostat housing, or water pump. ..
also the water gets into the oil too.. its not looking good..


ANy suggestions would be gratefully apreciated .. before i let the car sit until i can afford a full swap.. (it would be awhile)

Thanks,
Da JaMMoN MoN

[S13Grl]

Sounds lots like a cracked head, but you'd probably notice that because you'd be losing some compression. You should check the throttle body, there's a coolant hose right above it. Check the coolant system for leaks. After you let the car sit for a while, do you see any coolant puddles underneath it?

[Jammon]

the compression is basically ok from my point of view all the cylinders are within 5-10 of each other..

the coolant hose on the throttle body does that run coolant through the throttle body ? ..

as far as leaks  out the bottom there are non..
my next check is to pull the thermostat and run with out one to see if it leaking without being hot..

thanx for the idea tho..

[sykikchimp]

If coolant is getting into your oil (I think) that would either be:

Cracked Head
Cracked Water Pump
mm... or head gasket (but you said that was ok..)

I don't think coolant would be able to get to the oil from the intake manifold.  (could be wrong)

what were your compression #'s??  Are you burning oil?

[Jammon]

the only way I know of , of coolant gettin into the oil is 2 ways actually one way i knew it was doing it was when the water pasted the throttle body it went in the valve cover breather hose through the inside of the valve cover cuz i saw little rost on the top of the valve stuff.. the other way is if the piston rings are blow ..
the cars not blowin any color not even white..
my compression #'s are low but thats because the battery was half dead and didn't spin it fast enough.
#1 - 145
#2 - 138
#3 - 141
#4 - 139

I think i am going to take the head off today again and half it pressure tested, hopefully this will tell me something and hopefully it won't cost me too much..

oh and oil wise it doesn't lose a drop.
so? ... i think im going nuts workin on this..

oh i almost forgot ..... .the EGR hose that wraps around from exh to int is that important for the car running wise ... it is such a pain to connect and disconnect everytime u do something with the intake or head..

thanks for all you help...

Da JaMMoN MoN..

[sykikchimp]

Have you done a leak down test?  that should tell you WHERE you are leaking (if it is) from the cylinder.

[Jammon]

I have heard that from the many places and ppl i have talked to ... I am sorry to sound like im stupid but what does that involve.. ?

Oh and is there a coolant line that runs through the throttle body ?

[kalieaire]

a leakdown test is a cylinder pressure differential test.

Basically it requires a person that is rather knowledgeable of their car.

You'd first need a pressure differential gauge, basically that this does is allows you to set a preset amount of air pressure (regulated) into the cylinder of the engine via the spark plug hole(much like a compression test).  A gauge will tell you what percentage of air is being leaked out.  This is done at both TDC and BDC.  A compressor is hooked up to this assembly to put air through to the Cylinder that you're currently testing.  Then you put your ear at your exhaust, intake, or open up the oil cap and listen at those three locations to find out if you have leaky valves, or bad rings/pistons/cylinder walls.  Or, bad headgasket.

sound simple?  it's not, you need the FSM to help you do this cuz you need to know how to get a cylinder to BDC and TDC.

But this is THE test to figure out the health of your engine, as well as the extent of the problem. &nbsp;a Compression test is only like a checkup, whereas the Leakdown test is like a full physical. &nbsp;Ripping the motor apart would be "exploratory" surgery. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[wherezmytofu]

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (sykikchimp @ June 03 2002,4:30)</td></tr><tr><td id="QUOTE">If coolant is getting into your oil (I think) that would either be:

Cracked Head
Cracked Water Pump
mm... or head gasket (but you said that was ok..)

I don't think coolant would be able to get to the oil from the intake manifold. (could be wrong)

what were your compression #'s?? Are you burning oil?</td></tr></table><span id='postcolor'>
yup...chimp is right...one of those &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/smile.gif" border="0" valign="absmiddle" alt=':)'>

[Jammon]

well this is what i found out today ..
i disconnected the coolant hose to the throttle body to see if that was where the water was going in ... what i found in turn waiting for the car to open the thermostat was that i ran like 2 gal of water into the car, it just kept going down ..
so.. i noticed that water didn't even pressurize that coolant hose i stopped .. i kept on waiting to see the water start to navigate itself through the car when i noticed something ... waterish oil leaking where i had the PCV valve hose on not totally tight .. the water that i dumped in the car filled up the block with oil/water muck .. it got so far that it went out the PCV and went up the dip stick..

I think i am going to declare this motor a goner and either sell the good parts off and do a swap to somethin else likeeee SR20 .. or maybe CA18det .. .. &nbsp;

no worries tho it was basically a goner to begin with ..

so if any1 needs parts for a KA24E &nbsp; let me know..

or if you can help me find a head block combo for cheap that would be much appreciated.

PS... I need to find a good price on a VG30 ET motor .. its out of a 85 T Top Turbo 300zx.. &nbsp; just need block mostly but full swap would be great ...


Thanks ALL for your input ..

Da JaMMoN MoN &nbsp;<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/sleeping.gif" border="0" valign="absmiddle" alt=':zzzz:'>