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View Full Version : RB25 over heating again!!!


thrasher324
04-06-2010, 08:06 PM
so i did a flush last month and it was fine till yesturday so i replaced it with z32 tstat and my temperature changed dramaticly down to 180F and i was very happy but today it started over heating badly. i filled the coolant and bled the air out but its not doing anything...

my question is do you guys think its a gasket problem? because no matter how much new coolant i put in it comes out as brown color.

if gasket is the problem is it hard to install? i never got to work with RBs so


PS: cannot drain anything from the drainplug. its clogged. also the coolant is not milky or oily. just coolant but dirty. no smoke from anywhere either

thrasher324
04-07-2010, 03:08 PM
Anyone? I need help

jr_ss
04-07-2010, 04:17 PM
Check your oil, is it chocolately? If so you have a blown headgasket. Then proceed from there..

thrasher324
04-07-2010, 06:29 PM
what do you mean chocolaty..?

Ghost240
04-07-2010, 06:44 PM
what do you mean chocolaty..?

is your coolant brown!!!!

thrasher324
04-07-2010, 07:21 PM
is your coolant brown!!!!


yeah its brown as it can be. its oil i just flushed out the radiator and engine but when i turn the engine on while running water through it changes back to brown

jr_ss
04-07-2010, 07:32 PM
yeah its brown as it can be. its oil i just flushed out the radiator and engine but when i turn the engine on while running water through it changes back to brown

You're getting oil in your coolant some how... You need to figure out what's causing that and I bet your cooling issue will disappear.

thrasher324
04-07-2010, 08:56 PM
You're getting oil in your coolant some how... You need to figure out what's causing that and I bet your cooling issue will disappear.


im thinking either head gasket or turbo seals went bad

Sileighty_85
04-07-2010, 10:48 PM
im thinking either head gasket or turbo seals went bad

Do a compression Test

Oil and coolant wont mix through the turbo

eklips3
04-07-2010, 11:09 PM
i think its a headgasket .

you have two major symptoms of a bad headgasket.
1.) Overheating
2.) brown coolant


but do a compression test and go from there.

thrasher324
04-08-2010, 09:46 AM
i think its a headgasket .

you have two major symptoms of a bad headgasket.
1.) Overheating
2.) brown coolant


but do a compression test and go from there.


a good compression on rb25 should be around 160-180?

im not sure i did some research but everyone gets different. is it because of how many times they do the stroke?