Bleeblobz

iTrader: (1)

I recently tore a 12a down I have been playing with for some time now. The last time I was burning oil. When I got to the oil pump, I could not get the sprocket off the top. I also found a piece of metal in the oil pan. When I found the metal in the pan I thought the worst but it was actually the oil pump key, it must have somehow sheared off. Luckily I had a extra one. I am not sure if this has anything to do with the burning oil. I also needed to replace the oil seal o rings so hope this is it. Maybe I didn't have the key seated correctly? Anyone else have this come up?

j9fd3s

iTrader: (3)

i guess if you don't have the key seated, it'll pop out. it IS a PITA to get it seated

Bleeblobz

iTrader: (1)

If the sprocket turned the pump I thought it seated properly. It's obviously hard to tell if it slides down, I'm sure it can be partially seated.

Bleeblobz

iTrader: (1)

I have had this motor out more times than I want to admit, it's embarrassing. So I pulled the motor added new o rings found the oil pump was trashed and changed it out. I put the motor back together and started it today and now I'm getting a howling sound. I just had to walk away but I really am hoping I don't need to take it out again. I'm hoping it's not a seal, hope it's a belt? Like I said, I started it a few times and walked away once I heard the howling. I did completly tear the motor apart, cleaned everything and reassembled. I enjoy working on cars but this is frustrating.

Bleeblobz

iTrader: (1)

Turns out it's not a belt. It's actually a whisle, it sounds like it would be from a belt. Could the oil pump lost the key again? If a seal is seated improperly would it make noise?

85TIIDEVIL

iTrader: (2)

I learned a few tricks recently putting my motor together concerning the oil pump, chain and key...

1. You can make a small dent where the key shaft sits so it grabs tighter. Small*

2. Remove the assembly as a whole and you won't have to reseat the gear, key, chain, all that bullshit.

I did #2 off a core motor and just slipped it on to my motor. Sure beat all the fumbling trying to get everything lined up right again.

What is your oil pressure at...? That should tell you if your key fell out the bottom.

Bleeblobz

iTrader: (1)

My manifold wasn't on tight, another stupid mistake. My header seats very tight to my manifold or did. it was wedged on it somehow, enough to cause a gap and a whistle. I have since shaved the top of the header down and there is more room.

Bleeblobz

iTrader: (1)

Where is the oil pressure connection?

85TIIDEVIL

iTrader: (2)

it's a mushroom looking thing with one wire on the rear plate right under the oil filter.

Bleeblobz

iTrader: (1)

I got that part but thanks. I was looking for the connection that goes into it. I plugged it in and zero reading. Two things; one the sensor is from a older motor. One where it's in a different place, probably early 80's, mine is a 84. Second, I grounded out the wire and it pegs the needle so that should be working. I don't know if the sending unit is working. The car runs ok, it even runs ok without the sending unit in so I don't know if the hole is plugged. Can a rotary run without oil pressure? I have already started pulling the motor apart, I am hoping to just pull the front cover. Stupid question but can I pull this off without draining the oil? It's brand new.

Siraniko

iTrader: (13)

You should install a mechanical oil pressure gauge

Bleeblobz

iTrader: (1)

Yes, I know I should. I actually went up to a few stores to get a tester but no one has one. I didn't want to get the guage because I didn't want to cut a extra hole in the dash but I guess I could just use the guage as a tester. One thing, there is oil in the oil filter, I would think that would mean there is some pressure. I have read several posts on all the reasons why I may not have pressure. I can't find one saying how a rotary will run, or if, without oil pressure.

Siraniko

iTrader: (13)

Nah you wont need to cut anything since most aftermarket OP gauges come with mounting panel whcih can be mounted anywhere. You only need to run a tiny see-thru hose through the firewall (speedo cable grommet). I will not drive any of RXs without a working mechanical oil pressure gauge AND will not rely on an old stock gauge either.

Bleeblobz

iTrader: (1)

I got a mechanical guage. Pulled my distributor and gave it a go. No pressure at all. I am planning on pulling the motor this weekend but I really am out of motivation. I have read several posts and it looks like it can be many things. Would it have anything to do with the omp pump? Anything I should look for?

Siraniko

iTrader: (13)

First come to mind is the o-ring between the front cover and block. But i would disconnect the rear oil line (easiest one to do) and crank the motor. If oil squirts with a pressure then its good. If not, its internal including thd front cover oring

Bleeblobz

iTrader: (1)

I guess it's not good because no, no oil squirting. I did drain the remainder of the oil and hope to pull the motor tomorrow. So what would be the issue with the front gasket? By the way, thank you for the help. I'm sure it's difficult seeing stupid mistakes over and over.

bumpstart

little tip

you set the key slightly with the rear bum in the air with loctite and push the gear on

better still , never undo the front nut on the oil pump , and instead remove ( and refit ) the oil pump by removing the 4 x 10 mm base bolts with a ring spanner and lifting it off with chain and drive cog
thus keeping the gear on the pump

Siraniko

iTrader: (13)

missing spring/piston at the fron cover (above the large nut) no ropr regulator

Bleeblobz

iTrader: (1)

I am a little lost with the spring/piston. Are you talking about the omp? The oil pressure regulator? I have a 12a.

bumpstart

he is talking about the wax piston oil bypass found in s4 onward 13b crank snouts, ...disregard

Siraniko

iTrader: (13)

Im was referring to the oil pressure regulator on the front cover.

Bleeblobz

iTrader: (1)

So you are saying the spring may be missing from the regulator? Could also be the oring? The pump? What else?

Siraniko

iTrader: (13)

Just check the items i mentioned above as well as oil pump and check the oil pick up tube also. Very time consuming but cheaper than taking the entire engine apart

Bleeblobz

iTrader: (1)

Pulled the motor and found a blockage in my oil cooler line connection. Also, I looked around for some information on this earlier but couldn't come up with anything. The bolt at the bottom of the front cover, the one with the spring in it. What is this exactly and what should be in there? The reason I ask is I have two covers and they don't seem to be the same.

Siraniko

iTrader: (13)

I will take pix tomorrow but once you remove the big nut at the bottom of front cover (mounted vertically or facing up), the long spring and piston should fall out. If you found the spring but not the piston, check inside that cavity, it may be stuck up there.