Broke_Ass_Nova_Turbo
20-01-04, 03:25 PM
Hello,
Having just replaced one dead engine in my 1.6 8V turbo, it appears we may have another engine in a bad way. Upon start up there is significant pressure from the rocker cover breather, included in this pressure is a qty of oil. The qty of oil increases as the engine runs and warms up. So much so that you can see the oil vapour [blue/white] coming from the breather.
This is a crankcase pressure problem and is clearly causing the oil to blow out of the breather system. So we got round to compression testing the engine. Remember 1.6 Turbo, Garett T3, Custom stainless 1 1/2" manifold, oil take off from rear oil gallery, return to modified sump. There is no spacer plate or lowered compression ratio, it uses
From Cam-belt [1] end to Dizzy end [4] *****DRY TEST*****
CYL 1 200
CYL 2 155
CYL 3 122
CYL 4 142
The wet test was approx 20PSI higher. This may indicate worn valve seats or guides, however, we are seeing no loss of vaccum at idle - the boost gauge is reading 15 in Hg. Does anyone have any idea as to what could be the problem.
Thanks
Dave
Having just replaced one dead engine in my 1.6 8V turbo, it appears we may have another engine in a bad way. Upon start up there is significant pressure from the rocker cover breather, included in this pressure is a qty of oil. The qty of oil increases as the engine runs and warms up. So much so that you can see the oil vapour [blue/white] coming from the breather.
This is a crankcase pressure problem and is clearly causing the oil to blow out of the breather system. So we got round to compression testing the engine. Remember 1.6 Turbo, Garett T3, Custom stainless 1 1/2" manifold, oil take off from rear oil gallery, return to modified sump. There is no spacer plate or lowered compression ratio, it uses
From Cam-belt [1] end to Dizzy end [4] *****DRY TEST*****
CYL 1 200
CYL 2 155
CYL 3 122
CYL 4 142
The wet test was approx 20PSI higher. This may indicate worn valve seats or guides, however, we are seeing no loss of vaccum at idle - the boost gauge is reading 15 in Hg. Does anyone have any idea as to what could be the problem.
Thanks
Dave