Phlebmaster Posted February 25, 2008 Report Share Posted February 25, 2008 :confused:I have a 1985 200sx with the 2L motor 5 speed. It just started making a weird sound sorta like a subaru motor and I noticed a slight coolant smell from my exhaust (no smoke).....Head gasket, right? What about this....today when I had it idling I just for kicks pulled the oil filler cap and the motor stalled. It starts up and idles fine but as soon as I pull the oil filler cap it stalls again. :eek: I checked the coolant...no oil, I checked the oil...no froth, HELP!! What does that mean?? Any help or ideas are appreciated.:D Quote Link to comment
nismopu Posted February 25, 2008 Report Share Posted February 25, 2008 it should die when the oil cap is off if your system is operatin optimal, which it sounds like it is(very rare). Usually, they just drop in idle and run rough but yours is doing what the factory set it at. Far as coolant smells go, I would check any and all lines going to the intake because nissan loved to heat the intake in the 80's. Also, it could be a very small coolant leak between the cylinders causing the fouling. This happened on a friend of mines 720 and it sounded mechanincal when we revved it abit. He replaced the HG and all was well! peace. Quote Link to comment
Phlebmaster Posted February 25, 2008 Author Report Share Posted February 25, 2008 I checked all the plugs (all 8 of them) and they looked pristine. :confused: It has new cap, rotor, plugs, wires, injector seals, reman intake air flow sensor, air filter, CHERRYBOMB aka (fart cannon):eek:! Is it possible the intake manifold gasket could leak a small amount of coolant into the cylinder? It seems strange that this sound started suddenly and........I still need to check for vacuum leaks around the intake manifold. I will do this first then finish whinning about that sound later.:D Thanks for your help!! Quote Link to comment
fiveNdime Posted February 25, 2008 Report Share Posted February 25, 2008 I think its the head gasket. Check your oil too. See if it looks milky white/grey in color. See if you can see water beads. Even if the head gasket is bad doesnt mean the oil will look this way its just another test to see. How is your cooling system? Check the coolant level, is it getting over pressurized? It is possible that the intake could be leaking. like nismopu said could be one of them coolant passages that run through the intake. Also the easy way to check for a vacume leak is to get some starting fluid and spray it round where you think the vacume leak is. If there is a leak the motor should change its idle speed. Quote Link to comment
hang_510 Posted February 25, 2008 Report Share Posted February 25, 2008 when my last HG blew i was getting combustion pressure in the radiator :eek: no coolant in the oil or vice-versa. any 'milkshake' in the top of the oil cap??? do a compression/leak down check Quote Link to comment
Phlebmaster Posted February 25, 2008 Author Report Share Posted February 25, 2008 No...so far the oil cap looks clean, and the water level was a little low but no back pressure in my radiator. I was just a little alarmed when I smelt coolant in the exhaust......maybe I smelt too much exhaust??:D Quote Link to comment
moparvwfreak Posted March 15, 2008 Report Share Posted March 15, 2008 i have had an intake gasket blow before. it sucks. it blew on a 75 corrola SR-5 while comming home from ocean shores. got a BIG smell of coolant but no smoke fromt he exhaust. so its possible that its getting into a single cylender and causing it to missfire on that ONE cyl a dn not show signs of smoke. Quote Link to comment
fiveNdime Posted March 28, 2008 Report Share Posted March 28, 2008 Did you get the problem solved???? if so what was it? 90% sure its the head gasket though Quote Link to comment
Phlebmaster Posted March 28, 2008 Author Report Share Posted March 28, 2008 Thanks for asking.....Not fixed yet. I will be changing out the intake manifold gaskets soon, as well as the injector collars....silly things are made of plastic.:eek: The motor sounds like it has a vaccuum leak, lopes at idle, but acts like it's missing under load. Plugs are clean. I tried detecting an intake leak by using starting fluid.....no change in idle. I'll let you know if the gaskets are the problem. Quote Link to comment
datzenmike Posted March 28, 2008 Report Share Posted March 28, 2008 Stop guessing. How will you feel when that doesn't fix what little problem you do have. Do a compression check. If it looks fine I wouldn't run out and get a HG for it. Did this happen just after changing your cap and rotor? Quote Link to comment
Phlebmaster Posted March 28, 2008 Author Report Share Posted March 28, 2008 You know Mike.....the cap and rotor was changed recently. I will get a compression tester and Harbor Freight...they are cheap. I'll give it a shot and let you know.:cool: Quote Link to comment
hang_510 Posted March 28, 2008 Report Share Posted March 28, 2008 autozone rents em for free :blink: i got a decent cheap one from kragen. not chinese! Quote Link to comment
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