ok so i have a 99 civic with a ls-v
b18a1 bottom
2000 si b16 head
ive been getting alot of pressure in my radiator almost instantly when i start my car.. it drives great never overheats. ive changed out my thermostat and radiator cap and still nothing there is no mixing in my coolant or oil but i am loosing a bit of coolant.. ive also notice that when im in vtec and at 6500++ rpms there is some white smoke any ideas?? i am gonna get a Comp. Test as soon as i can.

 

the smoke is normal. alot of b16 head/b16's tend to smoke in Vtec cuz it increasing the oil pressure since it basically running the motor harder.

 

check under your oil cap.. if there is cottage cheese lookin stuff under the cap, the head gaskets done..drain your coolant if chocolate water comes out your gaskets done..and "smoke can be normal, but white smoke tends to show its head with a blown gasket..my vtec only "smokes" on real cold mornings..good luck

 

What do you mean by pressure?

Take off the cap when cold, run the car look down in the radiator, see any bubbles? Do the same for the overfill tank.

You can always do a block test, a compression test will not tell you if you have a blown headgasket, just trouble with the engine, it helps to determine engine troubles.

 

Yea it does look really nasty and creamy under my oil cap i drained my coolant and it looks normal and only smokes white at really high rpms 6500++.. Thanks for the help!!

 

when i start my car the upper radiator hose gets reallly high pressure almost instantly and my coolant some what smells like exhaust fumes.. but if it is a blown head wouldnt it overheat??

 

Not all the time, exhaust gases get into coolant then you have a blown head gasket.

Any white smoke out the tail pipe just running it say when reving at idle?

 

your headgasket is blown.

 

your head gasket is more then likely done for.


Replace it, your water pump, and flush the crap out of the cooling system.
it would also be a good time, to inspect/replace the timing belt.

Check for leaks on the cam seals, replace if needed, as well as the oil seal behind the oil pump.

 

The head gasket is almost surely blown.

 

yup Head gasket is toast, they dont always blow from oil galley to water galley which causes the classic "chocholate milk" oil...... I have seen several on differnt car blow from water galley to combustion chamber, wich can cause white smoke (coolant burning in cyl) and a mysterious loss of cooliant but no drips under car (again its burning off in the cyl).....

I acctually just did a job on a y7 that was exactly this about 3 months ago...

sorry, not too bad or expensive if you do the work urself though

 

yea I thought so I have a head gasket already just need to get started.. thanks for the help and the info!
also what do you guys think about copper coated headgakets??

 

i've heard it gives a better seal. any particular brand you are talking about?

 

well I got it in a trade for some parts I had just sitting around all I know is that it was gonna be for a ls v setup like mine

 

Never had a problem out of them

 

cool thanks!