Car Info:
1989 325i 5 Speed
Purchased from AL, PO claimed the car had a blown head gasket between cylinders 5/6. After a compression test, all cylinders showed around 160 lbs.
I have seafoamed the car and I am using 93 octane fuel. The car will randomly give the code 1223 (Coolant Temperature Sensor) at times, and other times it will give code 1444(No Error)
I have replaced: Distributor cap, rotor, plugs, fuel pump, fuel sending units, fuel tank, fuel filter, vacuum lines, cleaned ICV, valve cover gasket, oil pan and gasket, adjusted valves, coil (used), guibo, O2 Sensor (used)
I think I need to replace the fuel tank breather (PN: 13901711395)
So I have searched and so far, I'm thinking my problem is a piston slap issue, but I think the noise I'm experiencing may be too random to be piston slap. I don't know where to move next and I'm considering having another head rebuilt to bolt on or just sourcing a running M20. Any help or advice would be greatly appreciated! I'm eager to get the car running by summer!
The problems I am having include an intermittent surging and knocking. The two do not seem to be directly related but I'm not positive. The car doesn't want to rev much higher than 4k. Once the revs get around that area, power cuts out and the surging is very apparent. The knocking isn't a broken rocker arm, I have checked multiple times. I will re-adjust the valves this weekend, because they do sound a little loud to me but that won't address the random knocking. See the videos below.
1989 325i 5 Speed
Purchased from AL, PO claimed the car had a blown head gasket between cylinders 5/6. After a compression test, all cylinders showed around 160 lbs.
I have seafoamed the car and I am using 93 octane fuel. The car will randomly give the code 1223 (Coolant Temperature Sensor) at times, and other times it will give code 1444(No Error)
I have replaced: Distributor cap, rotor, plugs, fuel pump, fuel sending units, fuel tank, fuel filter, vacuum lines, cleaned ICV, valve cover gasket, oil pan and gasket, adjusted valves, coil (used), guibo, O2 Sensor (used)
I think I need to replace the fuel tank breather (PN: 13901711395)
So I have searched and so far, I'm thinking my problem is a piston slap issue, but I think the noise I'm experiencing may be too random to be piston slap. I don't know where to move next and I'm considering having another head rebuilt to bolt on or just sourcing a running M20. Any help or advice would be greatly appreciated! I'm eager to get the car running by summer!
The problems I am having include an intermittent surging and knocking. The two do not seem to be directly related but I'm not positive. The car doesn't want to rev much higher than 4k. Once the revs get around that area, power cuts out and the surging is very apparent. The knocking isn't a broken rocker arm, I have checked multiple times. I will re-adjust the valves this weekend, because they do sound a little loud to me but that won't address the random knocking. See the videos below.
Comment