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Old 05-16-2022, 03:32 PM   #1
Scooby Newbie
Member#: 492008
Join Date: Sep 2018
Default Timing Belt Idlers Surface Rust

Well iím in a bit of a pickle here. I have a 2006 WRX that I had taken to a mechanic back in January to have a cam seal replaced after a suspected oil leak from that area. Long story short, it wasnít the cam seal but instead a cracked hose causing excess blow-by to drip down the block onto my headers. The mechanic who initially tore down the engine has since quit.

Hereís the conundrum:

The car has sat outside until now (4 months) with timing belt exposed and TGVs exposed (no cover besides the hood with intake mani removed). Thereís an abundance of surface rust on all the idlers and iím worried about putting it back together in this condition, not to mention any moisture that could have gone into the TGVs.

What is the best option in this scenario? Replace all parts with noticeable rust? Do a full timing belt kit? Try and remove the surface rust and hope the bearings are still good? Will moisture that got into the engine be an issue?

I just need some advice on how to proceed from here. The motor has 170k miles and I was hoping to get at least another couple years out of it. All maintenance has been kept up until this point with timing belt, turbo, headgaskets, valve cover gaskets, and hoses having been replaced around 150k miles.

Any advice is appreciated.
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Old 05-17-2022, 01:52 PM   #2
Max Capacity
Scooby Specialist
Member#: 149347
Join Date: May 2007
Chapter/Region: NESIC
Location: Tolland, CT
05 LGT ,09 SpecB


Seeing how it's been a day, and no reply, I'd reach out to this guy, https://www.subaruoutback.org/members/cardoc.46618/
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Old 05-17-2022, 02:37 PM   #3
Scooby Guru
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
2016 STI


if this isn't some spectacular car and you just want some more use out of it then just clean it up with light oil as best you can and run the thing

Obviously you can replace all that stuff, but you just need to decide what you feel like doing/spending.
Cars are a lot more resilient than people give them credit for.

as far as the engine, once it's running it will clear out moisture and just do an oil change early on
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Old 05-26-2022, 11:46 PM   #4
Scooby Newbie
Member#: 530206
Join Date: May 2022

Personally wouldn't recommend rusted idlers even if it's minor, but I don't think it's going to be a big issue. If the timing is in such a position that the valves were left open for all that time, some moisture/particulate could have gotten into cylinder(s) but likely will not be an issue once you've gotten the car running again.
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