about to buy this renesis
#1
about to buy this renesis
im about to buy this renesis but i want to start it first before buying, anything else i need aside from radiator, fuel pump, battery?
do i need oil coolers if only to start for a while? any sensors i need to bypass? BTW, the engine is just on the top of the crate with loom and ECU
thanks!
do i need oil coolers if only to start for a while? any sensors i need to bypass? BTW, the engine is just on the top of the crate with loom and ECU
thanks!
#3
Beyond what you listed, and whatever modules would be talking to the ECU and giving it the go-ahead to start (body control module? ignition switch?), you're also missing the MAF
#4
it has a starter, so I can do compression test.. I believed there is a way I can bypass the immobilizer? anything that needs to hook on the panel gauge that requires to fire it up?
#5
Registered
Why would you want to fire it up anyway? You’ll need the exhaust attached so you don’t mess up your ears. I honestly think you’ll end up doing more damage and won’t get anything from the “experiment” other then startup noise.
A compression test will give you more then enough info to make a good decision about buying it. Beyond that, any reasonable shop worth a damn will give a startup warranty, so if the engine is dead when you install it, you can bring it back.
A compression test will give you more then enough info to make a good decision about buying it. Beyond that, any reasonable shop worth a damn will give a startup warranty, so if the engine is dead when you install it, you can bring it back.
#6
firing it up will give me a clue that all sensors, wiring, rotor, ecu is in good condition before i buy, just to ensure worth i will pay for
im planning to start it just a around 1 minute to see if if everythings fine
im planning to start it just a around 1 minute to see if if everythings fine
#8
Registered
It’s a couple Psi difference. No big deal. It’s either healthy numbers or they ain’t. Warm / cold won’t change a thing.
I prefer to run mine cold so I don’t burn my ***.
I prefer to run mine cold so I don’t burn my ***.
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Brettus (05-09-2019)
#9
thanks guys, im planning to take a look with the engine this weekend and see what should be missing, i will try to crank also and see compression numbers,
By the way, it will not be installed on rx8, it will be a transplant on a sprinter thats why im reengineering to start it up on the crate
By the way, it will not be installed on rx8, it will be a transplant on a sprinter thats why im reengineering to start it up on the crate
#13
Registered
Cold compression numbers will not give you a good indication of health. Any junk yard or recycler engine is a roll of the dice. Depending upon the price, it will still be a good deal given all of the various parts you'd need for a Renesis swap. Mazda will sell you a 0 mile reman engine for $2800-3800 -- if you get a good deal on this one, the short block could be used as a core to Mazda for a reman, assuring you have a healthy engine for your build.
Another note: That looks like an 04-05 engine based upon the vacuum line routing. I'd look for a 2006+ motor as they had better OMP programming and theoretically would show less housing wear as a result. If going the reman route I suggested, it won't matter what year your donor engine is it will just be a core for a new reman, likely with fresh housings.
Another note: That looks like an 04-05 engine based upon the vacuum line routing. I'd look for a 2006+ motor as they had better OMP programming and theoretically would show less housing wear as a result. If going the reman route I suggested, it won't matter what year your donor engine is it will just be a core for a new reman, likely with fresh housings.
Last edited by furansu; 05-16-2019 at 12:05 PM.
#14
Registered
i understand metal expansion, and getting actual Hot Running data but at the end of the day, you can still judge a block with just cold numbers.
No way it will read 60psi cold (bad engine) but show 110psi hot (good engine after it warms up).
Sorry bud. My real world data says it doesn’t matter what numbers you pull.
#15
Smoking turbo yay
Hot numbers will generally be lower, actually.
Hence all the failing engines that can crank just fine on cold starts and yet refuse to start after the car warms up.
Hence all the failing engines that can crank just fine on cold starts and yet refuse to start after the car warms up.
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