the firing order is 12784563 you can also check valve cover still maybe on there
or go to 401 nailhead-v8buick.com
The firing order for a 1965 Buick Riviera, which typically has a 401 cubic inch (6.6L) V8 engine, is 1-8-4-3-6-5-7-2. This firing order is essential for proper engine operation and performance. Always refer to the specific service manual for any additional details or variations based on engine configuration.
Holden 302 V8 Its actually a Holden 308 Or a Buick 401 or 425 (referred to as the "Nail Head")
401 ME Order Appt Atty/Invest/Phys? what does this mean?
It varied from a 225 dauntless v6 to 401 nailhead v8
The most famous Buick muscle car was the 1970 Buick GSX. The GS400 & GS340 were also muscle cars. So was the Skylark GS and for sure the 1970 Skylark Stage 1 GS 455 which was a real runner. The Buick Skylark Gran Sport. Starting in 1965 with the 401 cu in (called a 400) 325 HP engine.
I had the same thing happen to my car that code means insufficent egr flow. You have to replace the egr valve.
401 x 1=401
The positive integer factors of 401 are: 1, 401
The factors of 401 are: 1 401 The prime factors are: 401 is a prime number.
The 1964 Buick Service Manual says: "Disconnect vacuum hose." then "Turn distributor slowly until yellow mark on balancer is halfway between the '0' and '5' degree marks on timing indicator." In other words, 2.5 degrees advanced.
-401
1 and 401.