Volva Penta 8.1L cam info needed
Posted: Fri Sep 11, 2020 8:27 am
What type of cam does Volvo use in a 2008 Penta 8.1/496 GXi? It is the 420hp engine and has stamped rockers. The mechanic found one was cracked.
They want $80 for one rocker and $1,900 to do the job. They also want to charge $600 for the "Volvo" spark plugs, plus labor.
This is my son's boat and we didn't think we wanted to take the time to do this ourselves, but now we are reconsidering. They wanted $6,000 to replace all 16 rockers, $1,000 of that for the stamped rockers. I'm fairly certain they are GM rockers. I've also read that these engines have a reputation for weak valve springs. I think we would like to do that ourselves as well, with better springs. I just need to know what we have so we can get the right parts.
After much research on the internet I have not been able to find cam specs, or even whether it is a roller or flat tappet cam. I found a picture of a cam that appears to be a flat tappet by the look of the lobes. Hopefully someone here can help.
Eric
They want $80 for one rocker and $1,900 to do the job. They also want to charge $600 for the "Volvo" spark plugs, plus labor.
This is my son's boat and we didn't think we wanted to take the time to do this ourselves, but now we are reconsidering. They wanted $6,000 to replace all 16 rockers, $1,000 of that for the stamped rockers. I'm fairly certain they are GM rockers. I've also read that these engines have a reputation for weak valve springs. I think we would like to do that ourselves as well, with better springs. I just need to know what we have so we can get the right parts.
After much research on the internet I have not been able to find cam specs, or even whether it is a roller or flat tappet cam. I found a picture of a cam that appears to be a flat tappet by the look of the lobes. Hopefully someone here can help.
Eric