devobuzz Posted July 1, 2020 Share Posted July 1, 2020 2005 LGT stock VF40 turbo. 102K miles. So I have this rattling noise that I hear when engine is running. Pretty much the same either cold or hot engine. I thought it sounded like a heat shield rattle but I do not have any heat shield on my CNT down pipe. Seems to be coming from the turbo area. I tried to pull off the down pipe to check shaft play but those bolts aren't coming loose. Can I check the shaft play by pulling off the air intake tube? Is it relatively easy? Tried to see from the intercooler inlet but the compressor isn't visible. Thanks, Ralph Link to comment Share on other sites More sharing options...
awfulwaffle Posted July 1, 2020 Share Posted July 1, 2020 You can do it, but if your inlet is original, you better have a replacement on hand. It will probably tear. Personally, I'd try more on the downpipe bolts. Link to comment Share on other sites More sharing options...
devobuzz Posted July 2, 2020 Author Share Posted July 2, 2020 Can I pull the turbo with the down pipe still attached? Link to comment Share on other sites More sharing options...
Max Capacity Posted July 2, 2020 Share Posted July 2, 2020 I don't believe so, that would be very difficult. Have you tried spraying the nut's bolts with PB Blaster something like it ? I use Aero-Kroil The stuff is amazing. Others say Automatic tranny fluid and acetone mixture at 50/50 mix works well too. I bolt the turbo to the up pipe. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
devobuzz Posted July 3, 2020 Author Share Posted July 3, 2020 Got the downpipe off. It turns out the wastegate flapper puck is loose and not making contact with the bypass hole. The actuator is jammed. Took off the actuator and pushed and pulled it a few times. Seems ok now. If it jams again will look for a replacement. Thankfully the shaft us tight with no play. Link to comment Share on other sites More sharing options...
Max Capacity Posted July 3, 2020 Share Posted July 3, 2020 Good to hear. thanks for letting us know. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
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