I have a 489 stroker in my 86 GMC 4x4 truck. It has a huge solid roller cam. It was sitting for 3 years ,but started occasionally . I put it back on the road,but the motor has an intermittent squeak/clank. Do you think it could be a lifter,or spun main bearing ? I had a lifter wheel come off before. Eventually I want to put this motor in my 86 Monte Carlo SS . I love the power and rpms of the solid roller, but when I freshen it I might just go with a big hydraulic roller,then I can set it and forget about it. It runs great,no missing or popping through the intake. This motor will rev to 8000 rpms,but tapers off around 7500.
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489 BBC
- Thread starter 6.2 turbo
- Start date
btfarm
America First!
When you're making that kind of power it's always best to go through the motor if you suspect a problem with the internals. Alot cheaper than finding out what was wrong after it scatters...
JM2C because that's what I'd do.
JM2C because that's what I'd do.
If it spun a main bearing wouldn't it also have rod knock ? It definnetly needs to be taken apart . I'm considering putting in a Vortec 350 with a carb intake and a cam with around 230 duration at .050. I have 3 Vortec motors,one is a 4 bolt with the powdered metal rods,but they all have bearing issues.