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Changing Metal Head Gasket For Rb25det

rych

By rych,
in General Maintenance

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rych Contributor

rych

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Posted

Just a quick one, i have a rb25det series 1 that seems to be leaking so i've decided to get a metal gasket. Did a search turn out i got mixed results of using 86mm or 87mm. I've got a stock machine, and the bore size is 86.5mm, just wanted to ask if its okay to go with 87mm as these are abundant as compared to the 86mm out there on the market.

anyone?please?i'll even do sucky sucky on the webcam for you just wanna get the answer asap lol.

GTRNUR Grand Master

GTRNUR

Posted
Posted

86mm is stock. 86.5 is 0.020" oversize. You want an 87. Ideally you get your bore size, but they dont make an 86.5mm gasket that ive ever seen.

What makes you think it "seems" to be leaking? Are you gettng bubbles and oily residue in your radiator at idle?

If your having overheating issues there is a LOT of other things to check before you go pulling the head off.

  • 2 weeks later...
rych Contributor

rych

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i dont have bubbles,oily residue or heating probs, just that there are oil residues at the sides joining the top and bottom end. Also the cylinder gasket seems to have oil at the sides too. I figured the stock gasket will only hold boost at the max of 1.2bar and i definitely wanan go beyond that, so a thicker gasket is on its way.

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