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38 Posts
Dear All,
This forum has been a great help with my R34 and I wanted to share with you my most recent experience.
About 3 months ago, went for an upgrade on the engine internals that included the camshafts (HKS 256 In and out), turbo's (HKS 2530), pistons (HKS Forged), water pump (Nismo N1) and oil pump (Nismo N1). To build a nice track car. The ECU was changed to a HKS FCON. Given that the temp in the tropics are quite high, uprated the Radiator as well (oil cooler already fitted), as well as fit the mines cam baffle plates and nismo oil sump baffle plates to ensure good oiling and cool running. Have been driving with this set-up for about 5000KM's, slowly running it in again. Then followed about another 1200KMs of varied highway driving.
Last Sunday the big test came on the track at Sepang in Malaysia. Did 3 sets of 5 laps (5.7 km each), car was running really well ( truely humming and It felt GREAT) (Temp oil max 110, water 86) on 1Bar boost for the entire track day. (Again since the first time out on the track, did not wat to push 1.35 bar, which is my max setting).
On the 1first lap of the 4th set, in the 2nd corner, oil pressure falls to 0 bar (reading as per Nismo 2.0 version for the display which has oil pressure, and by the gauge under the speedo), oil and water temps shoot up, immediately backed of the gas, shut her down and towed her back.
Monday, tuesday and this evening, we stipped the engine apart.
Damage is to the oil pump: the nismo oil pump screw scored heavily (measured it against spec, nearly 1 mm gone) on the side facing the crankshaft, no. 5 and 6 main bearings moderately scored (both the bearings and crankshaft journals). The rest of the engine (top end: camshafts, liners, pistons, conrod bearing and journals) look great - thankfully no damage there and nothing seems out of place.
The Nismo Oil pump comes as a complete unit, so the tolerances between the screw and the housing cannot be that far off what is supposed to be.
I am at a loss as to what would have caused the oil pump to fail. I just wanted to post this tread to find out if others with similar set up and using the Nismo pump had similar experiences. Additionally, hoping to find out if there are heavier built oil pumps out there that may be worth using. Since I need a new main bearing set and crankshaft, which would you recommend as well. Any advice is greatly appreciated.
Will head back to the garage with a camera to take some pictures to share with the rest, if that is useful.
regards,
This forum has been a great help with my R34 and I wanted to share with you my most recent experience.
About 3 months ago, went for an upgrade on the engine internals that included the camshafts (HKS 256 In and out), turbo's (HKS 2530), pistons (HKS Forged), water pump (Nismo N1) and oil pump (Nismo N1). To build a nice track car. The ECU was changed to a HKS FCON. Given that the temp in the tropics are quite high, uprated the Radiator as well (oil cooler already fitted), as well as fit the mines cam baffle plates and nismo oil sump baffle plates to ensure good oiling and cool running. Have been driving with this set-up for about 5000KM's, slowly running it in again. Then followed about another 1200KMs of varied highway driving.
Last Sunday the big test came on the track at Sepang in Malaysia. Did 3 sets of 5 laps (5.7 km each), car was running really well ( truely humming and It felt GREAT) (Temp oil max 110, water 86) on 1Bar boost for the entire track day. (Again since the first time out on the track, did not wat to push 1.35 bar, which is my max setting).
On the 1first lap of the 4th set, in the 2nd corner, oil pressure falls to 0 bar (reading as per Nismo 2.0 version for the display which has oil pressure, and by the gauge under the speedo), oil and water temps shoot up, immediately backed of the gas, shut her down and towed her back.
Monday, tuesday and this evening, we stipped the engine apart.
Damage is to the oil pump: the nismo oil pump screw scored heavily (measured it against spec, nearly 1 mm gone) on the side facing the crankshaft, no. 5 and 6 main bearings moderately scored (both the bearings and crankshaft journals). The rest of the engine (top end: camshafts, liners, pistons, conrod bearing and journals) look great - thankfully no damage there and nothing seems out of place.
The Nismo Oil pump comes as a complete unit, so the tolerances between the screw and the housing cannot be that far off what is supposed to be.
I am at a loss as to what would have caused the oil pump to fail. I just wanted to post this tread to find out if others with similar set up and using the Nismo pump had similar experiences. Additionally, hoping to find out if there are heavier built oil pumps out there that may be worth using. Since I need a new main bearing set and crankshaft, which would you recommend as well. Any advice is greatly appreciated.
Will head back to the garage with a camera to take some pictures to share with the rest, if that is useful.
regards,
Glad its not too badly damaged though ... good job you have quick reactions and stopped it quickly.
