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Compression Test - 6G Celicas Forums

Topic #96122 4 posts Started by trdproven
Guys did a compression test and got readings of 196-205 across the board. I know a lot of numbers vary and sometimes on older engines as long as they are fairly uniform it's ok. If these are considered high readings my thoughts might be to oil seepage/carbon buildup. Your thoughts since these are older engines.

94 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tom's|Competition Clutch|5Zigen|Apexi||Laille/Beatrush|Magnecor|Denso|Royal Purple|Optima|PIAA|PW JDM|Megan Racing|Nitto||Work|Greddy|Samco|Project Mu|H&R|Gates|Moog|Rota|Yokohama|Epman|1320|Upgr804 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tein|BC Racing|Greddy|89 Supra (Sold)90 Supra (Sold)
Any reason for the compression test or just checking? You could try running a high PEA injector cleaner like Gumout 2x for a couple tanks of gas and then do a piston soak with some solvents and recheck compression.

2000 Celica GTS 'slowest gts evar'1998 Mazda 626 FS-DE/CD4-E
Just checking... I was thinking about a top rebuild. So are those numbers ok since its uniform?

94 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tom's|Competition Clutch|5Zigen|Apexi||Laille/Beatrush|Magnecor|Denso|Royal Purple|Optima|PIAA|PW JDM|Megan Racing|Nitto||Work|Greddy|Samco|Project Mu|H&R|Gates|Moog|Rota|Yokohama|Epman|1320|Upgr804 Celica GT|Toyota OEM Japan|Toyota Racing Development|Tein|BC Racing|Greddy|89 Supra (Sold)90 Supra (Sold)
Most engines since the late 80's should be in the 180-200 ballpark, I remember reading on the 7A Toyota had 180 as nominal and then within some 10% or so as acceptable. I'd imagine the 5S wouldn't be much different.

2001 Miata LS 5-speed