Why you use a double roller chain! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

neonlarry · 09-05-2004, 05:18 PM

I had a really bad week for cars, brought two of them home on the back of a tow truck all in one day. Monday night we (whole family) were just leaving state fair, luckly with two vechicles, when my son calls me on the cell and says the 70 died. Well I turned around and we check it out - no spark. Wouldn't you know it I had pulled the glove box out (which had a spare module) to work on the interior. Well after an hour and a half home and back changing the module, then the capacitor, then the coil still nothing. So I pulled the cap and watched the rotor go around in fits and starts. By then its two in the mornig and I have to leave for work at four so we left it to be towed home later that day. Then I get to work pickup the stuff I have to deliver get half way through and the clutch packs up, another one home by tow. Got the truck apart today, have a look:

krue · 09-05-2004, 05:30 PM

That'll do it every time. The last time it happened to me I heard the chain jump a couple of teeth.

neonlarry · 09-05-2004, 05:40 PM

This is what the oil pan looks like. I'm going to try and clean things up (clean pan and pump, put in oil and filter, run priming rod until drill gets hot, change oil and filter, start it up and run until it gets warm, change oil and filter again and pray). Any other ideas?

**Canadian694x4** · 09-05-2004, 05:54 PM

All I can say is wow...that's Sh!tty...

72gord · 09-05-2004, 06:18 PM

You ever wonder who came up with that nylon-plastic timing gear idea? He should have been threw out on his rear!!

Tx Firefighter · 09-05-2004, 07:20 PM

You'll be fine. I've changed a bunch of them like that. Just drain the oil out and refill with new stuff. The oil pump pickup has a screen on it to keep stuff just like that out of it. The little plastic teeth left in there will set in the bottom of the pan and you'll never know they're there until someday you pull the pan you'll see them again.

71Chevy4-speed · 09-05-2004, 07:38 PM

That sucks! anybody ever use a gear drive? just wondering if they are worth the money.... I just like the sound if nothing else.

gonebad2 · 09-05-2004, 07:39 PM

Any idea how many miles are on that engine?? Now would be the time to install a bigger cam if you haven't done that already.

**fine69** · 09-05-2004, 08:56 PM

Last time i had one do that the oilpump screen was FULL of nylon. Lift the engine, drop the pan and see. Then put in a new oilpump while you are there.

68C15 · 09-05-2004, 09:18 PM

71Chevy4-speed, I am not sure but I have heard horror stories about gear drives inducing harmonics which end up cracking the cam. either way I dont believe they are wirth it unless you are running about 8000rpm & dont want any spark scatter.
when I bought my used 350 it had already been replaced with a double roller which was still in better shape than the stock replacement one that came with my kit. been in there for 7000 miles & no problem yet.
neonlarry, those small pieces scare me. how about blocking the oil filter bypass valve during the "flush" phase?

jlmtrout · 09-05-2004, 11:25 PM

You might want to place a strong magnet on the pan just to keep those tiny pieces from moving around. Just a thought. Good luck and keep on truckin'.....Jerry

Chevyguy111786 · 09-05-2004, 11:26 PM

my 305 has a gear drive in it. would it be worth it to put it in the 350 when i swap? i'm putting a cam, lifter, and roller rocker set in the 350 before i swap.

cduster · 09-06-2004, 12:22 AM

Leave the oil plug out and use a solvent gun with low air pressure to rinse the parts out the drain hole. THe low air pressure should keep them from going up the sides of the block, and most of them should go out the drain plug.

Dan

72 CustomCamper · 09-06-2004, 12:54 AM

Seeing how it looks like you have the pan off. I'd spray it out with brake or carb cleaner. Wouldn't hurt to spray out the oil pump too...

Chuck

09-05-2004, 05:18 PM	#1
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Why you use a double roller chain! I had a really bad week for cars, brought two of them home on the back of a tow truck all in one day. Monday night we (whole family) were just leaving state fair, luckly with two vechicles, when my son calls me on the cell and says the 70 died. Well I turned around and we check it out - no spark. Wouldn't you know it I had pulled the glove box out (which had a spare module) to work on the interior. Well after an hour and a half home and back changing the module, then the capacitor, then the coil still nothing. So I pulled the cap and watched the rotor go around in fits and starts. By then its two in the mornig and I have to leave for work at four so we left it to be towed home later that day. Then I get to work pickup the stuff I have to deliver get half way through and the clutch packs up, another one home by tow. Got the truck apart today, have a look: Attached Images __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

09-05-2004, 05:30 PM	#2
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,448	That'll do it every time. The last time it happened to me I heard the chain jump a couple of teeth. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

09-05-2004, 05:40 PM	#3
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	This is what the oil pan looks like. I'm going to try and clean things up (clean pan and pump, put in oil and filter, run priming rod until drill gets hot, change oil and filter, start it up and run until it gets warm, change oil and filter again and pray). Any other ideas? Attached Images __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

09-05-2004, 05:54 PM	#4
Canadian694x4 Born To Lose Club Join Date: Feb 2003 Location: Calgary, Alberta/Oxenden, Ontario, Great White North Posts: 13,307	All I can say is wow...that's Sh!tty... __________________ Brian Smith - "Born To Lose" 1969 Chevrolet K10 LWB Fleetside - Proud Owner For 22 Yrs - 1 of 208 Built & Sold In Canada!- 283 V8/350TH/NP208, 2" All Spring Lift, 32" Good Year MT/R's. 1972 GMC K2500 Custom LWB Fleetside - Proud Owner For 3 Yrs - 1 of 571 Built & Sold In Canada! - 350 V8/SM465/NP205, 4” Rough Country Lift, 33” Interco TSL Thornbirds 2007.5 GMC Sierra SLE 2500HD 4x4 - Proud Owner For 17 Yrs- 6.6L V8 Duramax Diesel/Allison 1000, 2" Lift, 33" Mickey Thompson MTZ's. 2008 Yamaha Raptor 700r - Proud Owner For 15 Yrs - ITP Mud Lites. 2015 John Deere 1025R - Proud Owner For 8 Yrs - 24HP Diesel/H120/54D/260B/SB1154.

09-05-2004, 07:20 PM	#6
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	You'll be fine. I've changed a bunch of them like that. Just drain the oil out and refill with new stuff. The oil pump pickup has a screen on it to keep stuff just like that out of it. The little plastic teeth left in there will set in the bottom of the pan and you'll never know they're there until someday you pull the pan you'll see them again. __________________ I'm on the Instagram- @Gearhead_Kevin

09-05-2004, 06:18 PM	#5
72gord Never enough time!! Join Date: Mar 2004 Location: sw Wisconsin Posts: 601	You ever wonder who came up with that nylon-plastic timing gear idea? He should have been threw out on his rear!!

09-05-2004, 07:38 PM	#7
71Chevy4-speed Speed Limit = Floorboard Join Date: Jan 2004 Location: Kasilof, Alaska Posts: 803	That sucks! anybody ever use a gear drive? just wondering if they are worth the money.... I just like the sound if nothing else. __________________ 1971 C20 350, 4-speed - Sold. 1985 K10 350, Built 700r4, Edel 1406, Performer intake, MSD Ign, Hooker Comps, Silverstars, Piaa drivers, LED tails, Toyo A/T 31's, Eaton Posi, the project. "Build for torque, horsepower will follow"

09-05-2004, 07:39 PM	#8
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	Any idea how many miles are on that engine?? Now would be the time to install a bigger cam if you haven't done that already. __________________ Your Bought And Sold....I Got Your Soul!

09-05-2004, 08:56 PM	#9
fine69 Senior Member Join Date: Dec 1999 Location: Urbana,Ohio,USA Posts: 4,618	Last time i had one do that the oilpump screen was FULL of nylon. Lift the engine, drop the pan and see. Then put in a new oilpump while you are there. __________________ 2008 Chevy HHR 1/2 panel. 1949 Chevy Panel truck(just sittin, waiting) Board member #6

09-05-2004, 09:18 PM	#10
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	71Chevy4-speed, I am not sure but I have heard horror stories about gear drives inducing harmonics which end up cracking the cam. either way I dont believe they are wirth it unless you are running about 8000rpm & dont want any spark scatter. when I bought my used 350 it had already been replaced with a double roller which was still in better shape than the stock replacement one that came with my kit. been in there for 7000 miles & no problem yet. neonlarry, those small pieces scare me. how about blocking the oil filter bypass valve during the "flush" phase? __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

09-05-2004, 11:25 PM	#11
jlmtrout Registered User Join Date: Jul 2002 Location: Memphis, Tn Posts: 194	You might want to place a strong magnet on the pan just to keep those tiny pieces from moving around. Just a thought. Good luck and keep on truckin'.....Jerry __________________ '68 c-10 long wheelbase fleetside, been in family since new, originally 250 3 speed Now (389) 350 .060 over 3.75 stroke,Edelbrock Performer RPM 70cc heads and Intake 600 cfm Edelbrock,Small Comp Cams retro-roller cam and roller rockers,9:1 cr, headers, HEI,Old Air a/c, 72 power disc brakes w/stainless lines, 3.42 gear,T-56 6-speed, original paint(what's left of it). Dakota Digital Dash

09-05-2004, 11:26 PM	#12
Chevyguy111786 Registered User Join Date: Apr 2003 Location: Garland, Texas Posts: 1,127	my 305 has a gear drive in it. would it be worth it to put it in the 350 when i swap? i'm putting a cam, lifter, and roller rocker set in the 350 before i swap.

09-06-2004, 12:22 AM	#13
cduster Registered User Join Date: Oct 2002 Location: S.W. Michigan Posts: 403	Leave the oil plug out and use a solvent gun with low air pressure to rinse the parts out the drain hole. THe low air pressure should keep them from going up the sides of the block, and most of them should go out the drain plug. Dan

09-06-2004, 12:54 AM	#14
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,368	Seeing how it looks like you have the pan off. I'd spray it out with brake or carb cleaner. Wouldn't hurt to spray out the oil pump too... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"



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