Rattle???
#1
Rattle???
I have 2007 XL 4.2 V6 5 speed manual. My question is what could possibly cause the rattle under acceleration coming more from the engine area. I've already checked the heat shields and what not. It seems to be more noticeable at highway speed when I'm giving it more gas.
#2
Senior Member
Could be timing chain slapping possibly.
Heres what mine was doing before i redid tensioners, cam phasers, and chain guides (which were shattered into like 5 peices)
Heres after
Heres what mine was doing before i redid tensioners, cam phasers, and chain guides (which were shattered into like 5 peices)
Heres after
#3
Senior Member
Check all of your pulleys and their bearings also.
It could be preignition though. I think the 4.2's have an issue with that. Try running higher octane. If it goes away, then you probably have carbon built up in the cylinder. The carbon gets so hot that it ignites the fuel/air mixture before the sparkplug.
It could be preignition though. I think the 4.2's have an issue with that. Try running higher octane. If it goes away, then you probably have carbon built up in the cylinder. The carbon gets so hot that it ignites the fuel/air mixture before the sparkplug.
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matt37342 (11-16-2014)