Ducky
Club Member
For the first time in 5 years of restoration I got my Datsun running! I'm over the moon but obviously there were going to be some issues.
Couple of things need advice on if anyone can help please!
Background info zfarm rebuilt my L28 engine, it was rebored to 2.85L with new pistons due to cylinder scoring, and had a carb specialist tune my rebuilt twin Hitachi SU carbs. Got l28 electric dizzy and electric fuel pump.
Issue 1 - Oil dripping from between bell housing of trans and engine. I've assumed it might be the crank seal.
I'm not losing a lot but it's continuous. There's also small wet patches around crank case at various points starting from the gasket. Appears more excessive at the rear which made me think maybe that's the source of the dripping.
Issue 2 - Idle cylinder one not firing. Under load get about 14.5:1 (o2 sensor fitted just after join of 6-1 exhaust) on average and all cylinders appearing firing well, it's just at idle and lambda reading goes to 16-17:1.
Using probe I can see spark on all cylinders but removing coils shows something is up with cylinder 1. Have swapped spark plugs and put new ones in and not a difference. Running twin Hitachi SU carbs so front 3 cylinders should be getting the same mix but but just not firing.
Carb specialist suggestion was to check the inlet and exhaust valves. I don't want to start taking the engine apart until I've made a clear plan.
Appreciate any help and feel free to ask for more info.
Thanks
Simon
Couple of things need advice on if anyone can help please!
Background info zfarm rebuilt my L28 engine, it was rebored to 2.85L with new pistons due to cylinder scoring, and had a carb specialist tune my rebuilt twin Hitachi SU carbs. Got l28 electric dizzy and electric fuel pump.
Issue 1 - Oil dripping from between bell housing of trans and engine. I've assumed it might be the crank seal.
I'm not losing a lot but it's continuous. There's also small wet patches around crank case at various points starting from the gasket. Appears more excessive at the rear which made me think maybe that's the source of the dripping.
Issue 2 - Idle cylinder one not firing. Under load get about 14.5:1 (o2 sensor fitted just after join of 6-1 exhaust) on average and all cylinders appearing firing well, it's just at idle and lambda reading goes to 16-17:1.
Using probe I can see spark on all cylinders but removing coils shows something is up with cylinder 1. Have swapped spark plugs and put new ones in and not a difference. Running twin Hitachi SU carbs so front 3 cylinders should be getting the same mix but but just not firing.
Carb specialist suggestion was to check the inlet and exhaust valves. I don't want to start taking the engine apart until I've made a clear plan.
Appreciate any help and feel free to ask for more info.
Thanks
Simon