Valve train issue?

TWS · December 26th, 2002, 11:24 AM

I've got a 425 Olds with a freshly rebuilt top-half of the engine. Now after getting it back together, it has what sounds like a backfire w/ a resonant ping coming through the carb. This only happens when you give it some gas and not while idling. Any ideas of what could be causing it?

Thanks-
Tom

Wade · December 27th, 2002, 04:16 PM

Hello TWS
My first guess would be you have too spark plug wire's crossed, assumming all valves are adjusted correctly check and double check

javi58 · February 8th, 2005, 11:38 AM

I HAVE A 70 CUTLASS WITH A 350 ENGINE, DO VALVES HAVE AND ADJUSTING GAP?.

jdorour · February 22nd, 2005, 09:31 AM

Olds engines have no valve adjustment (stock).

DerDriftext · January 10th, 2009, 03:50 PM

Just stopping by to say that the fourm seems to be a great place so i thought that i would signup and join in on all the fun

February 22nd, 2005, 09:31 AM	#4 (permalink)
jdorour Senior Member Join Date: Feb 2004 Location: Atlanta, GA. Posts: 122	Olds engines have no valve adjustment (stock). __________________ 1966 Ninety Eight Convertible - 425 Tri-Carb, Factory Dual Exh, Switch-Pitch THM400, 3.54 Posi. 1966 Catalina Wagon - 421 Tri-Power, M21, 4.11 Saf-T-Trac, 8 Bolt Wheels 1989 IROC-Z - 5.7TPI

January 10th, 2009, 03:50 PM	#5 (permalink)
DerDriftext Junior Member Join Date: Jan 2009 Location: Greece Posts: 1	Hey waz up Just stopping by to say that the fourm seems to be a great place so i thought that i would signup and join in on all the fun

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
1971 oldsmobile 98 lowrider.... 6 grand invested	TECH9TWISTA	Cars For Sale	1	January 30th, 2007 03:04 PM
FOR SALE. 1959 Oldsmobile Ninety Eight Convertible Coupe	Motorama	Cars For Sale	2	September 22nd, 2006 01:17 AM
Hello-New to group	melsolds69	Cutlass	10	April 24th, 2006 07:41 AM

December 26th, 2002, 11:24 AM	#1 (permalink)
TWS Junior Member Join Date: Oct 2002 Posts: 4	I've got a 425 Olds with a freshly rebuilt top-half of the engine. Now after getting it back together, it has what sounds like a backfire w/ a resonant ping coming through the carb. This only happens when you give it some gas and not while idling. Any ideas of what could be causing it? Thanks- Tom

December 27th, 2002, 04:16 PM	#2 (permalink)
Wade Junior Member Join Date: Dec 2002 Location: Ok Posts: 1	Hello TWS My first guess would be you have too spark plug wire's crossed, assumming all valves are adjusted correctly check and double check

February 8th, 2005, 11:38 AM	#3 (permalink)
javi58 Junior Member Join Date: Feb 2005 Location: riverside,ca Posts: 4	I HAVE A 70 CUTLASS WITH A 350 ENGINE, DO VALVES HAVE AND ADJUSTING GAP?.