M52 FPR question

[frankie591]

Looking for some help. I'm running an obd-1 m52 (21.5# pink tops) and have been chasing down some fuel mileage issues. I found today that the motor I bought had a 3 bar fpr from an e30 318is in the rail instead of the 3.5bar it should have. I replaced the fpr with a spare 3.5bar unit, but now I'm having a nice fuel leak (drip) out the fpr when I start the car.

The fuel rail design in my car uses a large snap ring to hold the fpr in, but the junkyard spare I had used a v-band design to hold it in. Is there a difference in the e36 fuel rails, and are these 2 types interchangeable?



This is the fuel rail type in my car



This is the fuel rail type my spare regulator came off.

Any help is greatly appreciated.

[e-dirtym52]

Don't know if it's my phone but I can't see your pictures. But for my obd1 m52 I'm using the snap ring style where there is like a little lid cover thing that the fpr goes into. But I have another rail that uses a worm clamp but I was leaking vacuum out of that. My new fpr with the snap ring style has no problems

[frankie591]

Don't know if it's my phone but I can't see your pictures. But for my obd1 m52 I'm using the snap ring style where there is like a little lid cover thing that the fpr goes into. But I have another rail that uses a worm clamp but I was leaking vacuum out of that. My new fpr with the snap ring style has no problems

For the snap ring style one, was there any washer/spacer or anything that went between the fpr and the snap ring? Or just fpr into the rail, then snap ring to hold it in?

[e-dirtym52]

It was just the snap ring. But if you buy a new for the fucker fits in really tight.