I would think that leakage out the exhaust would indicate warped exhaust
valves.??
On a watercooled Supervee (14.3 to 1) I get about 4% leakage with the motor
cold. I have never tried it like you should, with the motor warmed to
operating temperature. My opinion is that 7% to 9% is fine. I'm sure you
will get other opinions.
Greg Scharnberg
Des Moines, IA
82 Ralt RT5
95 Citation SF
At 04:50 PM 1/4/2003 -0500, Gonridn2@aol.com wrote:
>Well my Datsun Roadster motor is sicker than I thought, 20-35% leakdown #'s,
>most of it out the exhaust (bad rings). I overheated it last wknd out by
>blowing a H2O seal and finishing the last couple laps with very little water
>(VERY high water temps but cool oil and good oil pressure). With the 30%
>paycut at work, the new motor project is on indefinte hold, probably just
>pull the head, drop the pan, pop the pistons out, hone and re-ring (bearings
>as neccesary). What kind of leakdown numbers are you guys getting on similar
>motors (4 cylinder, pushrod, hi-compression pistons) fresh, and tired?
>Thanks, Troy
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/vintage-race
|