I bought this s5 street port fresh rebuild in a package deal. It started but sounded like it was on one rotor, did a compression check and got two 30's and a 90 on the front rotor. Took the motor apart and now I need some help on a couple things.

1) I found a jacked up spring how could this happen (motor ran for 20mins top)

2) Is the port job done ok?

3) A big pit on one of the rotors is it still usable?

4) Whats the minimum I need to buy to rebuild it myself?


When it did run it was ALOT of smoke , oil in the intake, oil in the downpipe/ back of turbo (which I did recently rebuild)and a bunch in the motor. Just a little history.

 

spring kind of looks like it got caught installing and someone forced it in, bending it, or they bent it trying to increase spring hight.. however thats not the way you bend them

port job is fine as far as clearing critical area's, its rathter convseritive imho

can you post a picture of the pit on the rotor? i see the mark on the iron, thats fine, atleast i would use it worry free.

oil in the intake? did you run an oil restrictor in the turbo?

thats alot of oil in the engine itsself, any idea's on why its there?

 

Sorry I meant pit on the plate rotors looked good..

no restrictor in turbo.. Stock s5

No idea why so much oil in there I put some atf in the front housing maybe 4 tsp no where near what you see

 

only other guess would be the oil control rings, springs installed in the correct direction? how to the seals themselfs look? are they oem or viton?

 

Seals are oem, I have not took apart the rotors yet will do soon... So the spring caused the low compression?

In other words change the spring check the oil control rings and rebuild ?

 

damn, i saw this engine in the car yesterday, and it's already taken apart.

Rick, you doing some good work.

as far as bent spring, that caused low compression. spring was probably installed incorrectly and flipped 180 deg and then bent across corner seal groove/edge.

you said the readings were 30-30-90, well 1 bad apex spring will cause 2 low pulses.

as far as port job, i know you can do better yourself. try porting some junk housings...

make sure there no scratches and grooves look good.

try posting some pictures of exhaust pot job, rotors and apex seal slot, corner seal junction.

 

more pics

 

Thanks pete here are some more pics .. baby steps gotta build my first one then those s4 plates in the corner will get practiced on.. Its a shame the guy I bought it from got screwed to.

 

Those stock apex seal spring that got bent?

Only way to bend those is bad installation...
Did you install both the short and long apex seal with the rotor?
Or did you install short first and then install the long spring after rotor was installed?


-Ted

 

...

 

I would inspect your oil control rings really carefully. That much oil looks like either someone put the oil control springs in the wrong direction or they knocked the ring itself into place (which you're not supposed to do). Go buy yourself the RA rebuild video. You'll learn alot from it.

 

That is a LOT of carbon on the apex seals for only 20 minutes of running.

Also, I agree with someone above me, that port is very conservative. It looks like the exhaust wasn't even ported, just polished a little.

 

pull the oil rings out and see if there are any 0-rings in the cages...
Next as far as I can tell the castirons look good but is there any scaring on them where the oil rings would ride????

Now on the apex seal spring the only way that will get bent up like that is when someone is frocing it into place..

the intake porting look ok could be bigger but you will be fine if you want to leave it the way it is..
The Exhaust ports do need to be a little bit bigger...

As for parts I can help you on what you need..

Here is what you will need to start as far as I can see

1 rebuild DVD {if you or a friend dont have one}
1 gasket kit
1 long apex seal spring

as for other parts you will have to be the judge on thoes as you are the one looking at the parts..
If you need oil 0-rings I have thoes in viton or OEM if thay dont look like thay have been replaced...



Dan

 

That engine looks to be put together again with old parts. The Apex seals looks like they been running for a long time. And the rotor looks like it's not been cleand propperly either. Looks like the corner seal on one side is stuck as well.

Overall it does not look to be a good rebuild. And as the others said, the only way the Apex seal spring can be bent like that is if u push the spring in. It should just slide down easy.

JT

 

Thanks for the help I ended up putting it back together using some s4 irons from a jspec motor. I wanted to order the PR porting template to see how big these ports were, but the site is no longer up. Got it running with 90 on all faces for the front and a hold of 100 and 95 on the rear with a hold of 110. Only ran it about 15 minutes and a drive up the block because the turbo I rebuilt at the same time had oil dripping from the chra and I had to order another kit. So after the turbo issue is resolved I might have completed my first Rotary rebuild.

 

where did u get this rebuild from?