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Rust on JDM engine Camshaft?! Was I ripped off? #4325329
02/09/17 06:32 PM
02/09/17 06:32 PM
Joined: Apr 2010
Posts: 183
Detroit
Kurtatron Offline OP
Kurtatron  Offline OP
Joined: Apr 2010
Posts: 183
Detroit
Hey everyone.

I am working on replacing my 1991 Toyota Previa Engine with a JDM replacement. Before buying, I asked the seller for pictures of the inside of the engine. At first, it looked great!



Once I actually received the engine, i noticed some grit on the camshaft lobes that wasn't coming off with the rub of my finger! It looks like rust!



I mean, the engine looks great otherwise, but you can see some more rust on the cam gears.



Guys, is this a problem, or do you think this engine will be a ok to install? I could use my old cams, but they have 200k miles on them, and they are heavily tarnished, but the engine ran before pulling. What do you guys thing? Thanks!

Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325332
02/09/17 06:38 PM
02/09/17 06:38 PM
Joined: Mar 2013
Posts: 4,784
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,784
The Midwest
I'd hit it with some 220 grit emery cloth or sandpaper and not worry about it.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325333
02/09/17 06:39 PM
02/09/17 06:39 PM
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
901Memphis Offline
901Memphis  Offline
Joined: Aug 2010
Posts: 12,903
Northern Kentucky
It's not on the lift part of the cam, you should probably just sand it off as gently as possible with the softest grit that works. The rust is what happens when an engine is exposed to the elements with no oil coating everything.


2012 Chevy Cruze LT 1.4T - 50k
2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325353
02/09/17 06:57 PM
02/09/17 06:57 PM
Joined: Jul 2010
Posts: 18,730
PNW
ZeeOSix Offline
ZeeOSix  Offline
Joined: Jul 2010
Posts: 18,730
PNW
Scotch-brite would probably work better than sandpaper in this case. If using sandpaper, I'd go with something like 600 grit wetted with oil.

Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325432
02/09/17 08:00 PM
02/09/17 08:00 PM
Joined: Aug 2004
Posts: 1,323
Michigan born but my heart bel...
JR Offline
JR  Offline
Joined: Aug 2004
Posts: 1,323
Michigan born but my heart bel...
scotch-brite or real fine emery cloth, I see this everyday. Nothing but surface stuff, dont worry.

Heck that shaft may have 200k on it too, cranks, cams. rods, you name it, gets cleaned up and reused.
It is common, new pistons/rings, seals, check/replace pump.



harvey


97 F250HD 7.3 320K 01 Astro 220K
93 metroXFi 94.5K
01 Impala 300K
04 RTV900R 1150hrs


Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325477
02/09/17 08:32 PM
02/09/17 08:32 PM
Joined: Nov 2006
Posts: 19,934
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,934
MA, Mittelfranken.de
Don't sweat this, I don't use Scotchbrite pads, wheels or sandpaper inside an engine it has the potential to do more harm then good even when wetted with oil.
Personally I would just wipe it down with Kroil or Liquid Wrench and a lint free cloth and forget it.


ASE L1, Master. Deutsch Meisterbrief.
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Trav] #4325493
02/09/17 08:58 PM
02/09/17 08:58 PM
Joined: Dec 2011
Posts: 4,755
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,755
North Carolina
Originally Posted By: Trav
Don't sweat this, I don't use Scotchbrite pads, wheels or sandpaper inside an engine it has the potential to do more harm then good even when wetted with oil.
Personally I would just wipe it down with Kroil or Liquid Wrench and a lint free cloth and forget it.

Yep, don't sweat it. It'll come off as soon as you fire it up.


"Zed's dead baby, Zed's dead."
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325498
02/09/17 09:10 PM
02/09/17 09:10 PM
Joined: May 2012
Posts: 5,387
Fort Lauderdale, FL
DoubleWasp Online content
DoubleWasp  Online Content
Joined: May 2012
Posts: 5,387
Fort Lauderdale, FL
I've taken light rust like that off with 4500 grit and oil. Engines are still running years later with no issues.

Try a penetrating oil and cotton rag first.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325512
02/09/17 09:26 PM
02/09/17 09:26 PM
Joined: Jun 2003
Posts: 17,365
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,365
Deplorable in apple valley, ca
They probably pressure washed it.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325517
02/09/17 09:37 PM
02/09/17 09:37 PM
Joined: Jan 2013
Posts: 910
California
Kool1 Offline
Kool1  Offline
Joined: Jan 2013
Posts: 910
California
I've used JDM engines in a few beaters and sold them about 15 years ago. One was an Isuzu pickup and the other was in a Toyota Camry. I sold the Isuzu pickup to an auto repair garage and they drove it for a few years with the same drivetrain without any problems. The JDM engines were cheap enough but I never liked the thought of having an engine with an unknown history in my own personal, keeper vehicle.

Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Trav] #4325906
02/10/17 12:21 PM
02/10/17 12:21 PM
Joined: Apr 2008
Posts: 37,185
Ontario, Canada
OVERKILL Online content
OVERKILL  Online Content
Joined: Apr 2008
Posts: 37,185
Ontario, Canada
Originally Posted By: Trav
Don't sweat this, I don't use Scotchbrite pads, wheels or sandpaper inside an engine it has the potential to do more harm then good even when wetted with oil.
Personally I would just wipe it down with Kroil or Liquid Wrench and a lint free cloth and forget it.


This. It will probably wipe right off with oil.


2018 RAM 1500 Big Horn EcoDiesel
2016 Grand Cherokee SRT
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4325920
02/10/17 12:33 PM
02/10/17 12:33 PM
Joined: Apr 2010
Posts: 183
Detroit
Kurtatron Offline OP
Kurtatron  Offline OP
Joined: Apr 2010
Posts: 183
Detroit
Ok, well guys. I have been looking in deeper into the engine. I decided to pull the oil pan. I'm here at work and have limited tools and time, so I wasn't able to get everything else off to the oil pan completely off. There's rust on the block, crankshaft, and rods. Is this gonna be a problem? Am I really ok if I the thing tests ok with a compression test? I am planning to take it to my mechanic for a compression test, and expert opinion. I am so disappointed with this engine so far...




Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4326187
02/10/17 07:26 PM
02/10/17 07:26 PM
Joined: Jan 2010
Posts: 75
California
Le_bow_ski Offline
Le_bow_ski  Offline
Joined: Jan 2010
Posts: 75
California
That much rust would perturb me. There's no call for any rust in a replacement motor you weren't planning on rebuilding. How are the cylinder bores?

Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4326258
02/10/17 09:55 PM
02/10/17 09:55 PM
Joined: Nov 2006
Posts: 19,934
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,934
MA, Mittelfranken.de
Lie the previous poster said look at the bores. I would look at the piston pins also, pull the main and rod caps one at a time starting from the middle for a look see if no wear marks and or rust on the crank journals and if the bearings are okay lube them up with assy lube and rotate by hand with a socket to smear it around the whole bearing.

The rust on the iron isn't going to cause any harm, wipe as much of it as you can away with oil and a rag. If its all good I would definitely do a couple of real short OCI with new filter. I would be disappointed too but give it a close inspection before condemning it, start up is going to be critical, lots of assy lube on bearings and oil everywhere before cranking.


ASE L1, Master. Deutsch Meisterbrief.
Re: Rust on JDM engine Camshaft?! Was I ripped off? [Re: Kurtatron] #4326439
02/11/17 09:19 AM
02/11/17 09:19 AM
Joined: Sep 2004
Posts: 7,530
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,530
Marshfield , MA
Isn't this rust due to a sea voyage with all the liquids drained . How hard would it be to get a look at the cylinders? Or do a compression test on the engine stand? Or fuhgeddaboutit. Maybe a fill with cheap oil and a short OCI. You aren't supposed to get emery dust or ALO2 near an assembled engine.

Last edited by andyd; 02/11/17 09:20 AM.

'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
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