Turbo II-FB

I have a 87 Turbo II rx7.. So last week end we pulled it out and noticed that a apex seal was blown. Well my question is I calculated my budget and I dont have money for a new housing. Will the housing be damaged b/c the OEM seal went out or do you think it will be usable. The car sat for2 years and it wouldnt work after that .

RotaryEvolution

iTrader: (30)

pics


likely not but it really depends on how the apex seal was ejected.

Turbo II-FB

what do you mean by likley not

RotaryEvolution

iTrader: (30)

when an apex seal comes out of its groove it usualy rattles around the engine a little before it gets expelled out of the exhaust port, these nicks sometimes can cause damage to new seals that are installed, be careful with rotor housings that have ejected an apex seal previously or you will wind up with similar results in a fraction of the time.

wpgrexx

I would say dont use it. even if it wasnt grooved up which it probably is it wont give you full compression. If it is close atleast get it lapped.

staticguitar313

iTrader: (2)

post pics ASAP

ddub

Most the time (like 95% if not more) when an apex seal gets chucked you lose a housing and an iron possibly.

syklone

Housings don't get lapped, irons do.

You can't tell without looking at the housings. Plan on it being toast though.

RotaryResurrection

iTrader: (8)

95% of the time rotorhousings get scarred pretty good when even a small piece of seal exits the engine. At the closing points of the rotor's sweep, there is less than 1mm clearance between it and a housing. Since apex seals are 2mm thick, there's just about no way that a seal fragment can NOT do damage to something, somewhere. As far as apex seal scars, one scar, no matter how small, is usually one too many to use. Normal grooving on the back edge from wear and mileage is acceptable to reuse, though. Plan on needing a new (or replacement used) rotorhousing anytime you break an apex seal, and 1/100 times you might not need one and you just got very lucky.

Now, the chances are a little better that the rotor is okay, but it's still somewhere around 85% of the time that you need a rotor, as well. It's possible to save a lightly or moderately damaged rotor with milling to 3mm, and of course the mate must also be milled and matched. There is no proven, effective repair for rotorhousings yet, though a couple of places in north america are working on it now.

Turbo II-FB

well I'm just saying... When the apex seal is ejected does it usually destroy the housing to the point were its no longer useable

RotaryResurrection

iTrader: (8)

Uh...

Well, in that case, I'm just saying...again...

TII '87

Just search a bit and you'll find a good amount of horror pics. Popping an apex usually do quite a ugly job...

even a 3 year old kid would know the housing is junk, you usually got some serious scarring...