I have an issue

[240sxFTW]

So the other day when i was pickin up my hardbody d21 my car just shuts off on the highway. My buddy was driving my car and i was driving my truck. He basically said that it just rapidly overheated then just shut off. When I try to crank it over it just has one constant motion. Its hard to explain but there is no pauses when it cranks over. Almost sounds electric? No compression what so ever. So i checked the oil and there was no coolant mixed in with it so that rules out a blown headgasket. I opened up the valve cover and the timing chain is still on tight. There was a funky smell coming from the oil though, almost like it was burnt. Im not too sure.

Anyway i was gonna swap in the ka24de pretty soon here just for fun, no boost. But i guess just for peice of mind id like to have an idea of what went wrong.

[Shabbernigdo]

the starter gear may not be engagin on the fly wheel. its prolly just free spinning.

as for the rapid over heat. mabey the thermostat failed.

if u do swap out the ka are u gonna sell it and if so how much?

[240sxFTW]

hmm. But when I turned the car on the temp gauge was at the top of the top. Im talking past the 2 "holy s***" dots. Could that be the thermostat also?

[Shabbernigdo]

hmm. But when I turned the car on the temp gauge was at the top of the top. Im talking past the 2 "holy s***" dots. Could that be the thermostat also?

if the car had cooled off for a few hours and the temp needle was still peged at the top of the gauge that may be an eletrical problem.

when the thermostat fails it causes your coolant to boil over and your engine to over heat. which in turn causes it to shut down but once the car cools off it should restart and the guages should be back to normal till the engine warms up agian.

[240sxFTW]

No, cars definetly not back to normal. I forgot to mention that it was smoking out the back of the engine when it went. Ive tried starting it and its still the same thing. Someone please help me.
Modified by 240sxFTW at 1:40 AM 9/5/2009

[OutToWinPAHC]

Warped head? What color smoke was it?

[Doya]

Looks like it's time for a new motor, or rebuild

[240sxFTW]

it was a white smoke.

[OutToWinPAHC]

Yeah head gasket it's allowing coolant to make its way into the CC and burn off. Check the oil and see if you also have intermix. Oil will smell sweet and look milky or greenish.

I say pull the head, clean the blocks deck and check it (straight edge and feeler gauges) If its not warped take the head to a machine shop and have them check it, and mill it if its not to bad. Should cost like 40-80 bucks. Then replace the valve seals and get a gasket set / timing set and enjoy your fresh motor.

The only thing bad is right now you cant check compression because you deff have a head gasket / head leak.

[240sxFTW]

I checked the oil as i said above and its clean. no coolant, milkiness nothing. just plain oil

[jeff420]

blown headgasket doesnt always make the oil milky.

[240sxFTW]

ive heard that also. are there any other symptons of a blown HG other than milky oil

[OutToWinPAHC]

WHITE SMOKE!!!! and the exhaust smells sweet

[Fr0zEn]

Blowing coolant out the exhaust is another sign, Your water pump might have failed.

[OutToWinPAHC]

Constant low coolant, and if you do a compression test and you hear bubbes in the radiator.

Do what I said before, a timing, gesket, head mill freshen up will cost you a while 400 bones

[jeff420]

ya. basically what you told us about your car, lol. just scrapped a hyundai today and the head was so bad you could hear the compression coming out between the head and block and the radiator, but no mixed oil.

[the converted]

Hook up a leak down tester and you'll know where it is leaking to.

[240sxFTW]

Well, do all my symptons add up to something like a broken crankshaft? My theory is that, there is no compression at all because the pistons arent even moving, the constant spinning im hearing is from only the valvtrain moving. Also if the Crankshaft is broken maybe it caused the flywheel to move or come off the shaft which in turn caused the smoke coming from that area....? My car has been overheated regularely lately and i think that it just got so hot that it made the crankshaft brittle and weak. This is just what im thinkin in the old noggin so dont cut me down if im wrong.

[OutToWinPAHC]

You can lead a horse to water but you cant make him drink

[Doya]

You can lead a horse to water but you cant make him drink

So true

[Second Shadow]

your head gasket is blown. oil and coolant travel through the engine by two different pathways, but both pathways go past the combustion chamber. your gasket only part way blew though, so the pathway that the oil uses is still intact, and not mixing with the water.

your combustion chamber and water jackets are not sealed from each other right now, so your engine compression is escaping into the water system, and water is flowing into the combustion chamber and being burned, which is why you have white smoke and no compression.

if your crank shaft had broke, there would be a lot of noise while trying to crank it, oil everywhere, water everywhere(leaking onto the ground), and you probably would have heard it happen while driving in front of your car. overheating would not make your crank get brittle and break and if it did it sure as hell wouldn't be the first thing to go.

[2056515]

listen to second shadow...he knows what hes talkin about. its the head gasket for sure....check your spark plugs...probably really wet and smells like coolant

[Second Shadow]

something else I forgot to mention(although it was sort of hit on earlier); although in our old cars a head gasket could just blow....it's a little unlikely. I would be checking the cooling system for something else that went wrong.

I seal, could have blown, your water pump might be bad, radiator cap or thermostat could be bad, lots of things that could have cause the cooling system to fail, and lead to the blown head gasket. you should find that problem and fix it or a new gasket will just blow again.

[240sxFTW]

sorry to bring this thread up from the dead but ive been still trying to diagnose my car, i cant afford an engine swap right now, winters coming so im trying to find the problem. heres a pic of my spark plugs. they are all charred black. whats that a sign of? can i check anything else to try and figure this s*** out? If i can guaruntee that its a blown HG that would be great.

Edit* forgot to add pics.

[Philipio]

Forgot the picture.

[240sxFTW]

i have huge thumbs....

[chaosli]

i donese sound like mine but before i rebuild my motor it was a bent valve on the exhaust side and it would do the same the electric winding noice. it was a bad motor when i brought it so i didnt know what happen before it died. but its probally the rust that make the valves stuck cause the motor was not under any cover

[240sxFTW]

Okay i opened up the TB and found a fair amount of oil in the intake mani. is this normal?



theres more than just that. the picture doesnt exactly show the amount thats in there. its pretty caked on.

[240sxFTW]

bumppp please help me i miss my car so much

[bretjohnson91]

No oil in the intake is a bad sign man i do believe it is your HG the best thing to do is what has been previously posted. Have head and block decks checked and milled if necessary check/replace faulty cooling components. and put on a new HG set and you should be in great running condition in no time.