timing chain worn out? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sixbangr · 04-17-2010, 01:34 PM

can't adjust the carb right so I checked the timing. It is at about 25btdc. It won't idle any other way. I assume the chain needs replacing. Have no idea the milage, just got it 2 weeks ago. Engine is a 250 out of an Old's.

sixbangr · 04-17-2010, 03:16 PM

I checked, no chain, you knew that. The eng. has a March,15, 1976 build date. It has the integral head. Compression is 150 on all 6. Maybe I should drop on the 2 barrel from Langdon. It has the HEI already.

Tx Firefighter · 04-17-2010, 08:41 PM

Sounds to me like the outer ring on the harmonic balancer has slipped. It happened to two separate 250 engine I have owned. A new one can be bought at any local parts store through the Pioneer brand line.

04-17-2010, 01:34 PM	#1
sixbangr Registered User Join Date: Jan 2002 Location: Texarkana, Texas Posts: 261	timing chain worn out? can't adjust the carb right so I checked the timing. It is at about 25btdc. It won't idle any other way. I assume the chain needs replacing. Have no idea the milage, just got it 2 weeks ago. Engine is a 250 out of an Old's. __________________ 1961 Apache short step.

04-17-2010, 03:16 PM	#2
sixbangr Registered User Join Date: Jan 2002 Location: Texarkana, Texas Posts: 261	Re: timing chain worn out? I checked, no chain, you knew that. The eng. has a March,15, 1976 build date. It has the integral head. Compression is 150 on all 6. Maybe I should drop on the 2 barrel from Langdon. It has the HEI already. __________________ 1961 Apache short step.

04-17-2010, 08:41 PM	#3
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: timing chain worn out? Sounds to me like the outer ring on the harmonic balancer has slipped. It happened to two separate 250 engine I have owned. A new one can be bought at any local parts store through the Pioneer brand line. __________________ I'm on the Instagram- @Gearhead_Kevin



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