Ok so I have my car back together and I put in the "stiffer" engine mounts from RX7.com and replaced the tranny x member bushings with the Banzia Racing poly ones. I noticed that from 2500-3000 rpms that I'm getting a vibration, is this normal? Should I start looking for a problem. I'm also seeing about 18psi oil pressure at 600rmp.

Little info

Rotary Aviation apex seal

New bearings

Act HD PP with 6 puck disc

Atkins thremal pellet

Street port

What were your bearing clearences?

What is the staus of the oil pump?







And yes, with stiffer mounts you will notice an increase in vibration

is it an s4?

It is an s4, I don't remember what the clearnce was exactly, but it was in the middle for the spec.

The oil pump was in spec, but has 150K miles on it. I was thinking about replacing.

if you have the o ring that goes between the front iron and front cover on wrong you can get low pressure



http://mazdatrix.com/faq/oring.htm

The vibration is normal. I would definitely check the O-ring on the front cover. I would also double check the gauge by using a different sender and gauge.

Ok well I'm going to be taking the front cover off over the weekend. I was wonder if theres a reason why I shouldn't just get a metal tube and make it go between the front cover and the front housing. Thread the tube and the housing side ect. This would eliminate the possable problem... I didn't do any searching for this on the forum so.

this is a hard problem to visualize over the internet. if it's bad enough that you feel like something truely is wrong, i would start at the easiest places first and work from there. check if your mounts are loose, driveline is within spec, possibly tires or other rotating components out of balance, ect.

are your oil jets installed? Dont laugh. A very well known builder sent me an engine without them

[quote name='DrifterRX' date='Mar 29 2005, 12:21 PM']Ok so I have my car back together and I put in the "stiffer" engine mounts from RX7.com and replaced the tranny x member bushings with the Banzia Racing poly ones. I noticed that from 2500-3000 rpms that I'm getting a vibration, is this normal? Should I start looking for a problem. I'm also seeing about 18psi oil pressure at 600rmp.

Little info

Rotary Aviation apex seal

New bearings

Act HD PP with 6 puck disc

Atkins thremal pellet

Street port


[/quote]



Seems like you may have tow problems..

Did you swap rotors or interchange them? that may be one of the vibrations or maybe its breaking up at 2-3k...?????

Drain the oil and look to see what color it is and if there are gold particles in it then get back to us..

Ok, well I pulled the front cover off tonight, change of plans for the weekend. So I dumped the oil and stuff. I checked the oil and its fine no bearing particls in it or anything, rather happy about that.

So onto pulling the front cover off. It came apart easy https://www.nopistons.com/forums/pub...IR#>/smile.png

It looked like it was blowing past the o-ring. So I replace the o-ring, made a paper gasket for the oil pump instead of just gms this time. So I get it all back together ok oil pressure at start up. I read Itos low oil pressure post and check the oil cooler line, stiff like its supposed to be. So I start driving it the 3 miles home and about 2 miles down the road it drops to 0... eh. I think its my oil pressure sending unit for my autometer gauge so I'm going to look into that again.

I checked the oil cooler line again and it was softer than before..... is that normal?



Yes I had repalced one rotor but I made sure it was from the same series.

I also flushed my oil cooler prior to putting my rebuilt in.



So if anyone know were I can find specs for the autometer sedning unit that would be cool.

Thx

Scott

Ok so I checked with a mechanical gauge and pressure is just fine. I dropped the drive shaft and the front U joint has a little catch in it. So now I need to find that nice write up about replacing the joints https://www.nopistons.com/forums/pub...IR#>/smile.png

It also has a low rpm miss that I need to figure out, goes away above 2k. Still looking into that little problem.



So a few things solved or at least figured out https://www.nopistons.com/forums/pub...IR#>/smile.png

[quote name='DrifterRX' date='Apr 7 2005, 05:50 PM']Ok so I checked with a mechanical gauge and pressure is just fine. I dropped the drive shaft and the front U joint has a little catch in it. So now I need to find that nice write up about replacing the joints https://www.nopistons.com/forums/pub...IR#>/smile.png

It also has a low rpm miss that I need to figure out, goes away above 2k. Still looking into that little problem.



So a few things solved or at least figured out https://www.nopistons.com/forums/pub...IR#>/smile.png


[/quote]



You have to replace the entire driveshaft, the joints are un-serviceable. The hesitation may be cured by testing and adjustiing the TPS.

No theres a way to replace the ujoints, theres a write up somewhere on the net I just have to refind it. Basically you just pound the joint in one direction until the cap comes out then go the other direction ect... not too hard I dont' think just need the part # they had listed.