hi everyone. i just got my new fd3s, the last owner said he rebuild engine when the car is 80,000km. now is 119,000km, cuz im worried about if he doesn't do it, is time for me to do it. i dont want my car broke on the road.
so do you guz have any tip for me?


thx alot

 

Tell him to present documentation of the rebuild and compression test results. If he isn't at least able to present compression test results, then something is shady.

EDIT: Since you already bought the car... You might as well test the compression yourself.

 

I did my own rebuild a few years ago. I can't provide any compression test results. I doubt many could.

Ask the previous owner for receipts or, if professionally done, his receipt for the build. That should give you an idea of the extent of the rebuild and how long ago it was done.
MAZDA REMANUFACTURED "reman" engines have a tag on the left side of the front cover. I suppose other evidence of a rebuild would be gasket maker in various places, around the pan. And bolts and hoses...bellhousing, starter, UIM, vacuum lines etc that look like they've been R & R'd recently.

If it's running well, just do all the maintanence and enjoy the car. It's not worth loosing sleep over.

 

I wasn't talking about compression test results immediately after the previous owner rebuilt it. I meant before you buy the car, have him test the compression. At first, I didn't realize that the OP had bought the car without having the previous owner test the compression. (Bad idea.)


If you cannot do a compression test, that's your own fault.

 

Do a compression test. And the engine will not broke for no reason?

 

Since I rebuilt my own engine it would follow that I can do one. And I have...two or three different times on different engines. But I don't have a print-out to show anyone. Neither would the majority of owners. So suggesting that "something is shady" if the previous owner can't is just silly. Period.
Have you ever done a compression test? If so, you would know that.....
#1. A compression test won't necessarily tell him if the motor really has been rebuilt. Which was his original question.
#2. Without a rotary engine compression tester...which is expensive and not readily available, results tend to vary depending on porting, seals used, the extent of the rebuild, rpm and other variables. Basically it's like taking someone's temperature. They could still be a cancer patient but you wouldn't know it from the thermometer. So while it's nice to have/do, it's NOT the silver bullet guarantee of a healthy engine you think it is. The majority of FD engines are ultimately rebuilt due to coolant seal failures, and a compression check won't tell you anything about that.
#3. Relative indicated vacuum is also something that IMO you can look at for indications of healthy or worn hard seals, housings or irons.

 

I assumed that you know how.

I never said it was shady if the previous owner didn't know how to do a compression test. That would be completely silly. I said that it would be shady if he didn't provide compression test results IF you had requested them, before buying the car.

A compression test should definitely be the first step. Can we at least agree on that? (Even if he doesn't have access to the proper compression tester.)

 

thx guys, so if i wanna do the compression test, where should i go? local rotary store? mazda dealer? or what ever?