vvette

Hi

If you were going to rebuild an engine, what is the minimum that should be done?
What would be most recommended? (Tranny, Thermostat etc)
What would the ultimate be? Thanks

BigCajun

iTrader: (1)

I personally wouldn't attempt a rebuild myself.

There are many threads about rebuilds.
I'm no expert but I would rather pay someone reputable to do it.

There are a few linked threads in the rebuilders discussion thread discussing options.


https://www.rx8club.com/rx-8-discuss...ilders-265177/

vvette

Im not doing this. If I bring to a reputable shop what would be the minimum for them to do?

jcbrx8

Ans. is it depends...
- Did the engine fail? If so, how, i.e. what failed?
- Are major components, e.g. plates, housings, and rotors, still w/in spec.?
- Can plates be lapped, ...housings refurbished?
- What w/b the intended use of the rebuilt engine, e.g. daily driver, track, F.I. etc.?
- If F.I., hardening is in order: solid dowels, studs, porting, upgraded injectors
- What's the condition of the water pump, OMP, oil lines & injectors?

These are just initial questions off the top of my head. Answers to these & more... will determine what needs to be done.

Loki

iTrader: (1)

You don't really want to rebuild your engine. You trade it for a known-good rebuild from said reputable shop (or Mazda). The risk that any one used engine has parts worn beyond spec is too high.
The ultimate would be to address the main weak points (you also probably don't want to wait for a rebuild to do that).

• Cooling system (hoses, rad, overflow bottle)
• Ignition coils
• Oil injectors test/replace
• Inspect/replace cat as needed
• Inspect/replace motor mounts as needed
• Belts and other consumables as needed
• Clutch as needed

For the engine itself:

• I wouldn't do real porting, but smoothing the sharp corner in the exhaust port where carbon collects is not a bad idea.
• Porting is a whole other subject, decide that on your own.
• Oil pressure pellet mod to increase oil pressure
• Clean thoroughly all intake valves
• (Obviously) replace all rubbers, seals and bearings. A rebuild from a reputable rotary shop will have done this.

CaymanRotary

Wont know what needs to be done until the engine is taken apart unfortunately. If you are lucky you could get away with just a master rebuild kit.

luckymike

Several of them have Drummond engines, and the owners rave about them. That puts Drummond high on my list for when my engine inevitably lets go. Drummond has limited bandwidth, however.






Kodi nox

Joeyjoiner

I'm having mine rebuilt here in Australia at the moment so prices are in AUS$
- used engine core because mine was junk $500 (short motor)
- new rotor housings $2800
- seal kit $1200
- used rotor $$$
- used front & middle irons $250
- new ignition sytem (LS coils, HT leads & plugs) $1000
- new water pump $200
- new cooling system hoses $250
- new belts $50
- air & oil filter $125
- sohn adapter kit $300
- labour $$$
and there will be more parts required....

RastaRx-8

just your housings and seals are over 4k . buy a reman or whole other good motor for that... what a crime. housings are 700USD new or 900 something AUS

CaymanRotary

Was about to say the same thing. Could get a reman for the same price, plus save on the labor for your guy to do the work of rebuilding it.

RastaRx-8

i mean i legit just paid 3700USD for a whole 2006 with rebuilt motor shinka that runs great and registered no problem.. id almost just sell you the motor :P

CaymanRotary

The problem is he said that he was getting it done "at the moment" meaning its set in stone.

jcbrx8

I rebuilt my current engine ~2 yrs ago, and am approaching 18k boosted miles. But for the component cost savings alone...as h/b suggested, will likely buy and harden a reman next time round.

potatochobit

I know this thread is old but this video might be helpful, not sure if it is still relevant today