deucedeuceEK

I did a compression test on my gsr and it came out to be like 213-210-208-230. I put a couple caps of oil in the 208 and it jumped to like 270-275 ish. Its a stupid question I know, but should I go ahead and have it rebuilt?

Hybrid96EK

Stock GSR? A stock GSR engine will usually show like 180psi or so on the gauge, so 210-230 is a bit on the high side. Did you do a uniform number of cranks or just crank it till it stopped? Valve clearance correct?

deucedeuceEK

yup stock. And I just cranked till it stopped. The motor was rebuilt a few years ago, and its always smoked a little bit from day one. But with the compression numbers I dunno.

jarvis199

ive had stock gsr's show low 200's before...

what do u mean it came out to be "like" those numbers, was that them or not lol???

the first 3 look normal, the last one looks odd... its usually more about how far apart the numbers are from each other, not so much the number itself... 180 would be kinda low for a gsr or b16...

wasthe car warm with throttle wide open during cranking and the ecu and backup fuses pulled?

Hybrid96EK

Low 200's isn't far from 180. Carbon build up could easily account for that increase...

Nominal is 199 according to the helm, so 180 wouldn't be that "low" for a GSR considering the variation people will see with elevation and different gauges...

One should not simply crank the engine over and over until the gauge quits rising and then consider it good. Think of it this way, if it takes one cylinder 10 cranks to show 200psi, but the other cylinders do it in 5 cranks, is this considered good results? I usually do 5 cranks each cylinder. Make sure you unplug the distributor, there is no need to mess with any other plugs or fuses. The ECU fires the injectors off the distributor, so you won't be injecting fuel and with the dist unplugged you don't need to worry about frying the coil either. The engine should also ideally be warm..

So, with this in mind... go out, redo the test using 5 cranks on each cylinder. Make sure you unplug the dist and hold the throttle WIDE OPEN when cranking. Make sure the engine is up to operating temperature also, then report back with your results. A smoking engine can mean a lot of things. Could be something as simple as your PCV valve, could be worn guides, worn stem seals, worn rings, etc.