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#1 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Found this in the oil pan
So i finally got my oil pan out to check the internals of my new truck. This is what I found. The material seems to be plastic or phenolic.
Does anyone know what this derbis is from? Looking at it now I should have placed somthing in the pic for scale, the large pieces measure 1/8"-1/4", fairly large.
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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#2 |
Trucks N Tranzams
Join Date: Dec 2002
Location: North Las Vegas, Nevada
Posts: 816
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Re: Found this in the oil pan
Looks like old gasket materiel, or bits of timing chain, the plastic teeth
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![]() '68 Chevy LB 383 TH400/GV/373 posi '56 Chevy 4WD SWB '64 Chevy short stepside '79 Trans Am 455/TH2004R/12blt/4whldisc 95 Kia (Wifes car) 2002 S-10 extended cab pickup "God punishes small sins immediately" |
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#3 |
My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: Found this in the oil pan
I'd guess really old gasket material from the pan and the bead on the edge is where it squished out. Maybe it's petrified cork!
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#4 |
Senior Member
![]() Join Date: May 2006
Location: Philadelphia, Pa. 19454
Posts: 9,512
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Re: Found this in the oil pan
I had stuff like that in my pan and it was the teeth off of my timing chain sprocket. No wonder nothing happened when I rotated my dizzy...
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Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim |
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#5 |
Sisyphus was my mentor!
![]() Join Date: Sep 2002
Location: Carleton Place, Ontario CANADA
Posts: 984
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Re: Found this in the oil pan
I'd have to agree with jaros, looks like that plastic crap they were putting on timing gears back then.
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passthebuck ![]() #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car |
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#6 |
Registered User
Join Date: Feb 2009
Location: Santa Rosa, CA
Posts: 267
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Re: Found this in the oil pan
Yeah! Plastic timing gear teeth! When I replaced the chain on my wagon ('68 327) I had 3 intact teeth left. I replaced the chain/gear with a double roller unit, and took all the bits out when I inspected the main bearings. No damage, the bits just fell into the pan and were drained over the years. Hope you're that luck!
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#7 |
My Carbon Footprint
Join Date: Oct 2008
Location: Orygun
Posts: 5,527
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Re: Found this in the oil pan
never seen that. Were they just doing that on the small blocks? I've only seen my fastback with nylon type sprockets.
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#8 |
What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Found this in the oil pan
That stuff is from the large timing gear.
Since you have the pan off, then pull the timing chain cover and change out the gears & chain set. If you feel the timing chain set is fine, then it just meens that the original was changed out and the junk from it was never cleaned out from the pan.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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#9 |
Formerly- 1972SuperCheyenne
![]() Join Date: Oct 2008
Location: Wake Forest NC
Posts: 5,782
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Re: Found this in the oil pan
Were they just doing that on the small blocks?
My 454 was like that when I tore it down to build for my 72
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--Josh My Build Thread:http://67-72chevytrucks.com/vboard/s...d.php?t=799218 A good crossthread is better than Loctite any day. Life is not about what you have, but who you have to share it with. |
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#10 |
72 GMC
Join Date: Feb 2008
Location: Wells, Maine
Posts: 534
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Re: Found this in the oil pan
they did it on a lot of vehicles for sound.
thats what i was told back then. |
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#11 |
BOHICA
Join Date: Mar 2008
Location: Stewartville, MN
Posts: 440
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Re: Found this in the oil pan
I have never heard of plastic timing gears on older V8's. Was this on all engines of this vintage? I have had my hands in a lot of small blocks aged from 1967-present and they all had steel timing gears. Does that mean someone replaced them at some point?
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Trying to save someone from their own stupidity is like teaching a pig to dance. It is a waste of your time, and it annoys the pig! |
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#12 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Re: Found this in the oil pan
Sounds like a pretty good consenseus on the timing gear. This is what my local expert (my neighbor (he is almost as good as this site)) also said. and he recomended the same theing vctroit said although I didnt want to hear it. I pulled it all apart and this is what I found.
New metal double roller timing gear. I suppose It was replaced and they didnt clean all the derbis out and that is what was left over. OK so while I had it torn apart my neighbor recommended check the bearings and put in a high volume oil pump. Done and done, I pulled a few rod bearings and they looked great. Is there anyting else I should check now that i got it torn all apart?
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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#13 |
Senior Member
![]() ![]() Join Date: Dec 1999
Location: Urbana,Ohio,USA
Posts: 4,618
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Re: Found this in the oil pan
Early to mid 70's the top timing gear had "nylon" (plastic) teeth.
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2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6 |
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#14 |
Registered User
Join Date: Apr 2004
Location: Clanton, AL
Posts: 1,253
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Re: Found this in the oil pan
Been there, done that. Definately timing chain (the big gear).
A lot of it usually ends up lodged in the oil pump pickup screen.
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85' CUCV M1009!!! The newest addition! 6.2diesel, Th400, NP208, & only 36k miles! 70' C-10 LWB Fleetside - Looking good these days! ![]() 05' Dodge Neon 88' Winner Escape Sport 1750 - 4.3v6 94' Seadoo SP 84' Honda TRX200, bare nekkid. Just a frame & tires. Always looking for another project or any good deal! ![]() Last edited by grayw0lf; 07-01-2009 at 09:02 AM. |
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#15 |
Registered User
Join Date: Jan 2008
Location: Raleigh, NC
Posts: 321
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Re: Found this in the oil pan
Found the same in my pan when I pulled it. It was from the timing gear, and the guy I bought it from had told me the timing chain broke at some point. I also found a few bent pushrods..
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#16 |
Registered User
![]() Join Date: May 2007
Location: Rapid City South Dakota
Posts: 2,359
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Re: Found this in the oil pan
The gear and teeth were metal but had plastic coating on the teeth, to make it quieter. Very common to chip off when it got old and brittle.
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Turp Mcspray New life for an old 2wd, farm blazer http://67-72chevytrucks.com/vboard/s...d.php?t=505987 My Blazer build http://67-72chevytrucks.com/vboard/s...d.php?t=342299 |
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#17 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Found this in the oil pan
lean up the oil pick up!!!
The 1/2 of the pickup that is covered like in the can (for lack of a betterr description) is probably PACKED with the nylon. This was done on small and big blocks |
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#18 |
Registered User
Join Date: Jun 2009
Location: Hampton Roads VA
Posts: 333
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Re: Found this in the oil pan
I got it all cleand out and back together. she is running great. thanks all
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Brad 72 Blazer CST 350/350/205 ![]() ![]() |
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