houston, we have a problem... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

SanitysBane · 02-01-2005, 12:41 AM

Well, well well. The truck wasn't getting spark so we thought that it was something in the distributor, well sence I hate the ESC distributor I changed it out with a normal HEI and the truck still wasn't getting spark. Very very odd. Well after i took the cap off again after trying to get it to run I noticed that the rotor was in the exact same place. I got dad to look at the rotor while I turned the engine over and guess what? The rotor wasn't moving. Looks like I either broke the timing chain, or the camshaft, probally the timing chain or so I hope. Now I get to pull the timing cover off, and probally the heads because I have a feeling that the valve's hit the pistons. In wich case it looks like I'm parking Red for a long long time. Looks like it backs to getting a ride to school with Mom and buming rides back home. Joy.

Russell · 02-01-2005, 01:06 AM

Doh, that really really sucks man!

plumbcut · 02-01-2005, 01:50 AM

dont sweat the valve to piston smack thing, its probably not as bad as you think.. throw a new timing chain on there and let her rip!

pc

piecesparts · 02-01-2005, 06:33 PM

It is a RELIGIOUS THING, when you throw a timing chain. There will most probably be a couple of bent valve pushrods after the piston hit the valves. I have seen it to many times to say anything else.

magnethead · 02-01-2005, 06:38 PM

Oh man, gotta hate that. Better hope you broke the cam, or you got more problems than you bargained for. Is the a grionding sound or anything when it cranks?

SanitysBane · 02-01-2005, 07:31 PM

Well joy. I pulled off the timing chain cover and i found....an unbroken timing chain. So that means that its something enternal and that means its motor pulling time. Hmmm...if the crank is bad maybe its time for a 496 stroker crank kit from summit and a bigger cam...but I have no clue what it could be, just sitting around waiting for Dad to come home right now. As soon as he does there will be more investigating into this matter.

76HighSierra · 02-01-2005, 08:06 PM

Pull the dizzy again and check (with a flashlight)to see if you still have gear teeth on the cam.

SanitysBane · 02-01-2005, 09:58 PM

Never thought about that one Marc, but either way pulling the camshaft is going to happen so we are pulling out the engine, we figure while we are at it we will look into why the number 7 cylinder has been burning oil. So thats what I get to do! im almost ready to take the engine out, been working hard and smart. All thats left is to pull the starter, the transmission crossmemeber, and the engine bolts and out she goes! So it should be laying in the floor of our shop by tomorrow. Ah the joys of truck ownership.

76HighSierra · 02-01-2005, 10:51 PM

Could also be a sheared woodruff key where the timing gear presses over the crank. This would allow the crank to spin, but the cam would remain motionless. Food for thought.

SanitysBane · 02-01-2005, 11:26 PM

Nope, Dad looked at the timing chain with the cover off whill i hit the starter, both spun, and the dizzy didn't turn in the whole very easy at all. Its kinda weird but if its something odd ball like the gear spinning on the camshaft im going to be hacked off to no end.

magnethead · 02-01-2005, 11:56 PM

pull the cam sprocket off and rotate it (one way or another) and see if the distributor rotates.

SanitysBane · 02-02-2005, 12:57 AM

The camshaft is broke in two, you can not move the rotor by turning it. The engine will have to come out.

SanitysBane · 02-03-2005, 12:53 AM

Well well well, sence I have roller rockers one of my set screws came out when i did a burn out at 6,000 RPM for a little bit. The screw came out and lodge between the hole in the liffter valley and the exhaust lobe for the #8 cyliner and broke it in too. We were able to fish out the other half of the camshaft. So the truck should be running. And here are the pictures!(sorry none of the burnout)

02-01-2005, 12:41 AM	#1
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	houston, we have a problem... Well, well well. The truck wasn't getting spark so we thought that it was something in the distributor, well sence I hate the ESC distributor I changed it out with a normal HEI and the truck still wasn't getting spark. Very very odd. Well after i took the cap off again after trying to get it to run I noticed that the rotor was in the exact same place. I got dad to look at the rotor while I turned the engine over and guess what? The rotor wasn't moving. Looks like I either broke the timing chain, or the camshaft, probally the timing chain or so I hope. Now I get to pull the timing cover off, and probally the heads because I have a feeling that the valve's hit the pistons. In wich case it looks like I'm parking Red for a long long time. Looks like it backs to getting a ride to school with Mom and buming rides back home. Joy. __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

02-01-2005, 01:06 AM	#2
Russell Professional Grade Join Date: May 2003 Location: Fort McMurray, Alberta Posts: 7,915	Doh, that really really sucks man! __________________ 1995 Chevrolet 2 Door Tahoe (6.6L LBZ Duramax / ZF6 / NP241 with 1 ton solid axle swap)

02-01-2005, 07:31 PM	#6
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	Well joy. I pulled off the timing chain cover and i found....an unbroken timing chain. So that means that its something enternal and that means its motor pulling time. Hmmm...if the crank is bad maybe its time for a 496 stroker crank kit from summit and a bigger cam...but I have no clue what it could be, just sitting around waiting for Dad to come home right now. As soon as he does there will be more investigating into this matter. __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

02-01-2005, 08:06 PM	#7
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	Pull the dizzy again and check (with a flashlight)to see if you still have gear teeth on the cam. __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.

02-01-2005, 10:51 PM	#9
76HighSierra DAMN, I love Big Blocks! Join Date: Aug 2003 Location: New Mexico, USA Posts: 619	Could also be a sheared woodruff key where the timing gear presses over the crank. This would allow the crank to spin, but the cam would remain motionless. Food for thought. __________________ Marc Bona Hobbs, New Mexico 1976 1/2 ton GMC High Sierra. 454 c.i.d./ TH400. *Soon to get a mild warming over.* 3.40 rear.

02-01-2005, 01:50 AM	#3
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	dont sweat the valve to piston smack thing, its probably not as bad as you think.. throw a new timing chain on there and let her rip! pc

02-01-2005, 06:33 PM	#4
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	It is a RELIGIOUS THING, when you throw a timing chain. There will most probably be a couple of bent valve pushrods after the piston hit the valves. I have seen it to many times to say anything else.

02-01-2005, 06:38 PM	#5
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	Oh man, gotta hate that. Better hope you broke the cam, or you got more problems than you bargained for. Is the a grionding sound or anything when it cranks?

02-01-2005, 09:58 PM	#8
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	Never thought about that one Marc, but either way pulling the camshaft is going to happen so we are pulling out the engine, we figure while we are at it we will look into why the number 7 cylinder has been burning oil. So thats what I get to do! im almost ready to take the engine out, been working hard and smart. All thats left is to pull the starter, the transmission crossmemeber, and the engine bolts and out she goes! So it should be laying in the floor of our shop by tomorrow. Ah the joys of truck ownership. __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

02-01-2005, 11:26 PM	#10
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	Nope, Dad looked at the timing chain with the cover off whill i hit the starter, both spun, and the dizzy didn't turn in the whole very easy at all. Its kinda weird but if its something odd ball like the gear spinning on the camshaft im going to be hacked off to no end. __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

02-01-2005, 11:56 PM	#11
magnethead 7000 #'s of american IRON Join Date: Dec 2004 Location: north tx Posts: 883	pull the cam sprocket off and rotate it (one way or another) and see if the distributor rotates.

02-02-2005, 12:57 AM	#12
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	The camshaft is broke in two, you can not move the rotor by turning it. The engine will have to come out. __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

02-03-2005, 12:53 AM	#13
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	Well well well, sence I have roller rockers one of my set screws came out when i did a burn out at 6,000 RPM for a little bit. The screw came out and lodge between the hole in the liffter valley and the exhaust lobe for the #8 cyliner and broke it in too. We were able to fish out the other half of the camshaft. So the truck should be running. And here are the pictures!(sorry none of the burnout) Attached Images __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer



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