viper down!

[lightningsxv]

hey guys recently i posted that a stud went threw my front heat exchanger. The sled over heated and worst of all my buddys Arctic-scrap towed me home! lol I did a compression test and found the first 2 cyllinders were both 100. The one on the drive side is 75! so im obv gonna rebuild her. and im glad it didn't blow up causing alot of damage. I'm young and funds are limited so im putting spx pistons in it. I kno I kno OEM all the way but my buddy has them in his srx for 3 years now and he has had no problems. Any thoughts on what else too do/look out for when im rebuilding? My sled has 15000 km so im more upset about the heat exchanger then the top end.

 

[sideshowBob]

Before you start twist'n your wrenches...get another compression tester guage and repeat the test. The Viper's do not run the same cylinder head volume on all three cylinders so it is not abnormal to have less cranking compression on one cylinder.

JM.02c

 

[lightningsxv]

oki thanks for the advice its a good mac tools tester but i will perform another test b4 i start rippin her down. does anyone have the true compression specs for my 02 viper? And if they vary which cyllinder? 1,2,3 thanks

 

[Maim]

pto if i rember correctly is the lower compression cyl on the vipers. usually runs 10lb less compression compared to the other cyls. make shure power valves are closed as if open will mess up your readings. you are at re-ring milage at any point so piston/rings will not hurt it.

 

[03sxviper]

weigh the 3new pistons on a scale indvidualy to make sure they are true weight to each other, If not send them back.

 

[journeyman]

If that compression tester is correct 75 psi is way too low.
Mine are about 127/143/143 starting at the pto. I have tow testers too.