So I bought my 94 gs-r 2 years ago it was sitting after it's rebuild for a year before I started driving it. The last owner drove it through a mud puddle (has cold air intake so it sucked it right up) and was SLAPPED back together. I've fixed the sloppyness (aka not torqued valve cover). I recently put in a new thermostat and I have lots of bubbles coming from the radiator. When I squeese the hose bubbles come up. the car has all new hoses and belts, it doesn't over heat, no smoke from the exhaust, it doesn't take fluid from the overflow, radiator is full of fluid when ever I check it. I think it runs a lil hot (a lil above the middle of the gauge) but it's ran that way since I owned it. It doesn't smell like coolent.
What do you think? possible warped head, head gasket, water pump, bad radiator, cruddy heater core?(heat fades in and out but usually warm and not very often) please shoot any ideas at me I don't wanna see my b18 go to the junk yard

 

Did you try purging the cooling system? Start there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Haleiwa-Brando &raquo;</TD></TR><TR><TD CLASS="quote">Did you try purging the cooling system? Start there.</TD></TR></TABLE>

x2

 

Take the radiator cap off and start the car, let it idle for a little while and get all the air out of the rad.

 

Sorry I forgot to mention that I did run the car with the rad. cap off and still bubbles. And purged it. So do you think it matters that I have a small cam plug leak and some how relate to the bubbles? I almost doubt it but who knows at this point. thanks for the ideas tho

 

if our car bubble while running means your head gasket is blown and your leaking exhaust/air out into your coolant system. Do a leak down test and if the compressed air comes out of the top of the rad then yup the head gasket. If you cant do a leakdown test get a shop too or start taking off your head

 

thanks I'll do that, it's the best possible solution.

 

anytime you take your radiator cap off your going to see bubbles,the water pump is turning the water which makes bubbles.I dont think you need to take the head off.Just try a leak down test but if theyre small bubbles its normal.