Cracked block/blown head gasget? Tech help!!

Matts89Notch

New Member
Jan 26, 2007
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Ok Well today I got back from another 400 mile road trip to see the girlfriend....To make this week the worst of my life about 150 from home I hear what sounds like a misfire...a small pop..:bang:

Ok the car is old but it does not have a crap load of miles on it, it just clicked over 77,000. It does not have highway friendly gears and I think this trip was just too much....I was going a bit too fast for a bit too long I guess with it humming nicly at a little under 3K.

Ok I have put about 3,000 miles on the car since I had it and it does not burn any oil to my knowing. It always ran on the cool side, I'm thinking it has a 160 t-stat in it.

Well to get to the point after that little pop I just kind of shuged it off because I thought it was a misfire. After some more driving the temp started to slowly rise to about the halfway point. I'm thinking thats it's ok because I'm crusing at a good speed and it's still in the normal range. A little later I notice its about 3/4 of the way up....I'm like crap somthings up and turned on the heat to low to help kill some heat....it keeps going up and the air started to blow cold.....As soon as I noticed that I got off at the next exit and pulled into a gas station and popped the hood.....The overflow was boiling over.....not good!! I had a antifreeze bottle in my car and went in the bathroom and filled it with water..I dumped it over the rad to and the overflow to cool things down and it worked....

After the car got complety cooled off I noticed the line from the rad to the over flow was pinched and fixed it....I was thinking that might of caused something...so I topped off the rad with water and put some in the overflow.

I went to leave and saw the check oil light light....I was like !)#$*#@...Shut it off and pulled the dipstick with it showing the oil was just bairly tuching the tip....went back in and bought 2 qts of oil...Put in a qt and it was still at the fill mark...put in another qt and it still needed more!! I was like what the crap is going on the car never burned this much oil or any at all....I had to buy a 3RD QT and put in about 1/2 of it to make it right again...The car was running fine before and when I fired it up it ran just like it was new, nothing seemed wrong...Start driving again and noticed after about 20 miles it was back to the half way mark and climbing...when it got to the 2nd line from the red I pulled over again to find it doing the same thing with the over flow boiling....CRAP! I had a the anti freeze bottle filled with cold water, I let it cool and refilled it again.

To finish this story off I had to put the the heat on high and drive about 20mph slower than before to keep the temp at the 3/4 mark and it worked....I had to get home...When I got home I let it cool and pulled the cap off the rad...To my horror it was a milky brown....I knew right then and their why the oil was low before:bang:

Ok the only thing I can think of is my head gasget blew...that would expalin the pop OR MY BLOCK IS CRACKED!:bang: :bang: :bang: :bang:

What I want to know, can the oil still get into the coolent if it blew or is that a sure sign of a broken block....I want to cry:bang:

I know about doing a compression test but I'm convinced its cracked because of the color of the fluid...It runs fine though and their is no smoke comming from anywhere??
 
Ok well I went down to take a look at the car and the coolent was green and looked fine?? I don;t know what is going on but my friend said that the block is deff, not cracked and the head gasget should not be blown because there is no smoke?

I do know that that their is no pressure in the system because you can pinch the upper rad. hose together even when its running.....BUT I did change out the water pump so it's deff not the pump...BUT I also just noticed a hole in the top of th epump that shows the shaft for the pully....their are no threads and I don;t know how I missed this hole...should it be pluged and would this cause the pressure leak??
 
When the engine is running and the rad cap is off, is there constantly bubbles coming through the coolant? If there is, exhaust is getting into the coolant somehow. I would also do a compression test to see if you have a low cylinder. If compression is good and you have no bubbles it could possibly be your intake gasket leaking coolant into the oil, but then your oil should have been overfull and milky. I would definitly do a compression test and check for bubbles constantly in the rad first.
 
I do know that that their is no pressure in the system because you can pinch the upper rad. hose together even when its running.....BUT I did change out the water pump so it's deff not the pump...BUT I also just noticed a hole in the top of th epump that shows the shaft for the pully....their are no threads and I don;t know how I missed this hole...should it be pluged and would this cause the pressure leak??

by hole at the top of the pump, i think you may be thinking of the "weep hole." this drips coolant when your pump has gone bad (in my case all over the place :mad: ) kind of letting you know to replace it. there should be another one or two maybe on the underside of the pump. its supposed to be there.

i think you "should" be able to pinch the upper rad hose together if i'm not mistaken. :shrug:

dont start the car with milky oil! bad

a compression check/leak down test/ coolant system pressure test will all help you to narrow down the problem. good luck man, i just went through this all while swapping P heads/intake onto my 93. its looking like it was the intake gasket and hopefully **crosses fingers** its all sorted out right now. i was flipping out for a few weeks thinking i had a cracked/warped block...
 
The oil looks fine as does the coolent. When I looked at the coolent before and it 'seemed' milky is was still a little hot..My friend said thats normal for coolent that has been boiled to turn a dark color, because of all the buildup that stirs up from the emense heat...?

I went down a little while ago and looked at it again and it seemed fine at the top, it was clear/green. I was thinking it might of settled but I did not want to start it again because it's getting late, besides I was thinking that nothing will happen untill it warms up and the t-stat opens?..if it even works...

I'm thinking that this week when I have time I'm going to take out the t-stat and drop it in a pot of boiling water to make sure it's working right...Than I will put it all back together and refill it with coolent and go for a test drive..

I'm unsure of what could of caused this, the only thing me and my buddy can come up with is that the high speed/rpm for 6+ hours of stright driving was just too much for the stock cooling system...espically with the fact that it was way low on oil....

I'm thinking now that because the car was 2 1/2 qts low on oil, it was simply too much for the stock cooling system to handel with the extra friction caused by a lack of oil...but after i refilled it I would have thought it would have cured the problem unless the high rpm driving was just too much for it at that point....

All I can do now is check the t-stat to make sure it works, if it does put it back in , go for a nice cruise around town long enough for the car to warm up, and see if it runs cool like it used too...If it does than I know that the problem lies with the fact that I simply overheated the car and was pushing the stock cooling system pasts it's limits(which arent much lol)...and the fact that it was low on oil probally caused this to happen in the first place.....I'm praying at this point and if it happens again I will go on to check the compression....

What are signs of a blown intake gasget? What a day.......I have had 4 hours of sleep since wed night......thursday I drove all night to my gf's college, stayed up untill about 3-4am sat morning....got 4 hours of sleep....drove 400miles/6 hours back with car trouble.....got home at 3:30 and still made it to work on time by 4pm.....now its 2 am.....I'm ready to pass out......Thanks for your help, EVERYONE!!!!!!!!
 
The coolant could be/have been brownish due to rust in the cooling system. I've cleaned my radiator out before and all kinds of rust came out.

If you pull the thermostat, I would recommend to put a 180* or stock 195* back in. While the 160 may work fine, there's really no reason to have a thermostat that low if your cooling system is working properly.

If the car isn't leaking or burning oil, how did it get 2 1/2 quarts low on oil? I'd change the oil and see what it looks like when it dumps. You *could* just put the oil back in if it looks fine, but I would just do a complete oil change.

An otherwise healthy car overheating on the highway is usually a signal that the radiator is faulty; overheating in the city with an otherwise healthy car points to the fan/shroud.

If problems persist after the thermostat/oil change, do a compression or leak down test. When my head gasket blew, I got coolant in my cylinders and the car wouldn't even start, but I don't think that's always the case.

Good Luck
 
I said that I did not think the car burned any oil or at least around town it did not....Now I know it does, or at least from going at 3K+ rpms for 6+ hours....

Today I took the car for a nice test drive, going wot a few times to make sure she was running fine. The car got to the second mark up, guessing about 180-190*, and satyed like it always did before...It runs fine and pulls just as hard as it did getting a nice healthy chirp into 3rd gear.

I'm thinking that after i get my brakes done I'm going to upgrade the rad and get an electric fan....than for my birthday this june it's getting a new intake set-up ect...guess it was a false alarm and learned my lesson to check the oil every tank of gas to make sure its in check....Thanks for the help guys!
 
Thats what I was thinking...I have only put 3,000 miles on the car since I had it and already did 2 oil changes....It never burnt any oil from 0-2200 miles but on the last road trip just from about 900 miles it burned 2 qts from pushing it so hard..
 
possible problem

check your head bolts. i had similar overheating problem and i thought i had a broken head. after i bought tf/tw heads i found a broken head bolt when i went to install the new heads. i cant explain why,but that was what happened to my car. It is an 88 gt convertable w/aod was totally stock at that time with 110,000 miles.