Need help on my rb20 its keeps overheating??

Discuss the RB20, RB25 and RB26 series engines.
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joeythemech
Posts: 27
Joined: Thu Apr 23, 2009 1:41 pm
Car: s14

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Well i just got a rb20 but it keeps overheating i got a new radoitor,two dual fans,z32tt thermostat and the water pump looks like it been replace.i dont know what to do anymore can anybody help me plz


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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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gotta be a bit more specific here man, how do you know its overheating...do you have a proper temp gauge or are you going by the stock one?

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virus77
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Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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does it overheat on the highway, at idle, on boost... Are the fans wired in the right direction?

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joeythemech
Posts: 27
Joined: Thu Apr 23, 2009 1:41 pm
Car: s14

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well for the gauges i have the skyine gauges in there rite now and it strat to overheat on boost when am idealing am fine and when am at highspeed it ok when am not boosting.i got the fans in the rite away i got them blowing in to the radiotor.

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mattblancarte
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Joined: Sat Jun 21, 2008 4:14 pm
Car: 2005 BMW M3 Comp. Coupe

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So you have push fan(s)? Sounds odd that you're overheating quickly just because of a little boost. Are you driving like a maniac or something, or how quickly does it start to overheat? More info plz.

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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proper engrish would help...but please more info, if you're overheating when you go into boost then something is wrong for sure.what is your base timing set at and are you using the proper sender for the coolant temp gauge?

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joeythemech
Posts: 27
Joined: Thu Apr 23, 2009 1:41 pm
Car: s14

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I drive it for 2 miles in 85 degress weather just curzing.Then the temp gauge is telling me it overheating. so i pop the hood and smoke is coming from the radiotor and the coolant is sizzling n that after i put a new 4 core radiotor ,two pushing fans,a z32 thermostat.and the base time set i have no clue?if u need anymore info just tell me. I relly need this fixed

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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4 core radiator?what kind of radiator did you put in, and seriously take a picture and post.have you tested your radiator cap?

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joeythemech
Posts: 27
Joined: Thu Apr 23, 2009 1:41 pm
Car: s14

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never tested the radiotor cap because it not even two months old.but i well give it a shot.and i well get some pic as soon as i can.

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virus77
Posts: 1775
Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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Head gasket perhaps

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turboredneck
Posts: 31
Joined: Sat Nov 08, 2008 5:43 pm
Car: 1993 240 hatchback

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Mine does that if I didnt bleed the air out of it good enough. Mine runs fine with only 1 12" fan.

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virus77
Posts: 1775
Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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Seroiusly, i assumed it was properly bled but that could do it for sure.

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joeythemech
Posts: 27
Joined: Thu Apr 23, 2009 1:41 pm
Car: s14

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I well try to bled it out i hope it works at great.Sorry i could not get the pic up. thax to all of u guys for helping me i hope it works.

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virus77
Posts: 1775
Joined: Thu Mar 25, 2004 9:43 am
Car: 95 S14, 71 240z, 97 e320

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just curious if you figured it out?

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meet07
Posts: 1189
Joined: Tue May 08, 2007 5:48 am
Car: 89 180sx rb25det
Location: North Carolina
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yeah I want to know to. All of a sudden my rb25 is trying to over heat. Its been fine now for a whole year. All I did was flush the system, add water wetter and now she wants to get up to 210??? the car stills pull hard do. Ive bleed it properlly and everything. Base timing is 15 at 700-800rpms

-jack the car up-remove sensor on freddy intake-fill and then put sensor back in-crank up car and let it run with heat on

every thing is fine until I put the cap on and let it idle after driving for say 10 minutes???


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