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#1
12-10-2014, 11:50 AM
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400 or 428
Hi guys I have a problem,and I know that if anyone can solve it ,is you guys.I bought what was supposed to be a 428 ci engine.The number on the front is XJ 159048.The problem is the number on the back of the motor is 978613 last # 8,3,or 5.My machinist tells me that everything points to a 400ci engine,crank,main journals and pistons.What do you think,any ideas? Thanks guys I would appreciate any help,Tim.
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#2
12-10-2014, 11:58 AM
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400 blocks have a 0 0 cast in the center of the lifter valley , a 428 will have a 28 in that spot.
I think all 428 blocks are 4 bolt main even if not fitted with the 4 bolt main caps. All 428 motors have dished Pistons , 400s do not. All 428 motors have 4.250" mains, 400 motors have a 3" main. How long is the ring ware pattern on the cylinder walls? 400 motors will be 3.750" long, 428 motors will be 4.00" long! If the motor has 5 tapped motor mount hole on each side then it for sure is not a 428! Just get a new crank with 3" mains and a 4" stroke and you have a 428, which you would have gone for a better new crank anyway by the time you pay for reconditioning the stocker!
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
12-10-2014, 12:03 PM
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look for the transfer lug on the pass side rear of the block.Tom
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#4
12-10-2014, 02:12 PM
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It is a 400.
XJ is a 400 code for 1967 with block code 9786133. It is a 350 horsepower engine from a Grand Prix. I have one of these. Mine does not have the "O O" cast in the lifter valley though. I don't know if they started doing that later, as mine is a very early (fall of 1966) block. All of the 428s I've seen do have a "2 8" cast in the lifter valley, though. There was a 428 with an XJ engine code, but it was a 1969 engine and the block code for that engine would be completely different: 9792968. On the mains, I think Steve meant to type "3.25 inch" mains, rather than "4.25 inch." |
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#5
12-10-2014, 02:12 PM
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Quote:
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
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#6
12-10-2014, 02:19 PM
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Quote:
  
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1971 Pontiac GT-37 Car is a junk yard dog and maybe one day will be restored.  
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#7
12-10-2014, 03:01 PM
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I don't think the '67 or '68 blocks had the displacement cast in the valley. The didn't start doing that until '69 or '70.
As others have said, 428 was made from '67-69, had 3.25" main journals, 4" stroke, 4.120" bore, 2-bolt motor mounts, 4-bolt blocks but some had 2-bolt caps. Only available as a special order in big cars. A 400 has 3.00" mains and 3.75" stroke. The 400 and 428 blocks are completely different due to main journal diameter. So if the engine is apart, it's a pretty open and shut case to ID what you have. According to PontiacPower.net, looks like there were two similar block casting numbers in '67. One was a 400 and the other was a 428. Either would be a desirable block. My 400 is a XU Code 9786133 from a '67 Catalina. It's a solid casting and does NOT have the displacement cast into the block. 9786133 1967 400 9786135 1967 428 (Boodlefoof beat me on the hole shot below) Upon further digging with the XJ code provided, your block is a '67 400 from a big car: XJ B-body 67 400 Turbo 400 L-67 1x4 9786133
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I could explain all this to the girl at the parts store, but she'd probably call the asylum. White '67 LeMans 407/TH350/Ford 3.89... RIP Red '67 LeMans. 407/TH400/Ford 3.25 Last edited by chiphead; 12-10-2014 at 03:46 PM. |
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#8
12-10-2014, 03:55 PM
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Quote:
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1972 Pontiac Lemans 350 Qjet Summit 2800 |
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#9
12-10-2014, 04:01 PM
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XJ for 67 is 400 as Boodlefoof said. A 67 428 will not have the 28 in the valley or say 428 on the outside. It will also have the transfer lug as Tom said which is a hump on the back of the block near the distributor hole. I believe the 326 and 455 had them as well but you would have completely different cast codes and stamps.
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#10
12-10-2014, 06:08 PM
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Most all 389-400 did not have the lug.Most 326-350 and 3 1/4 mains had the lug.Learned to never say all.Tom
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#11
12-10-2014, 06:30 PM
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What the hell is the transfer lug for and why don't they all have it?
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#12
12-10-2014, 07:37 PM
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the mysterious transfer lug. just going by it, you either have something good or junk. lol it was on 326, 350, 421, 428, 455
I wouldn't be to disappointed. a 1967 block is a good block. |
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#13
12-10-2014, 07:37 PM
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when did they start casting 400 on the blocks?
my 78 400 has 400 on it my 69 does not at least not that i have found |
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#14
12-10-2014, 08:04 PM
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389-400s were the std engine for most cars.The transfer lug told the line that that block went for diff machining like bigger mains or smaller bores.Tom
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#15
12-10-2014, 09:25 PM
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Quote:
I was curious too. According to PontiacPower.net, the casting of the "400" on the side of the block and the "O O" in the lifter valley began in 1971. |
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#16
12-10-2014, 10:57 PM
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I have a 69 block on the stand that does not have the designation embossed but my 70 block does. Transfer lug is missing on 400's but the others have them.
__________________
1971 GTO,72 400, stock bottom end, 670 heads, Lunati BMII cam, headers, iron intake Q-jet, four speed. Best 60 ft 1.806in 2004. Best 1/8th mile e.t. 8.46 with 3.55 open rear 85 Grand Prix, 70 400, casting 62 heads stock rebuild, Turbo 350 trans 78 800 cfm Q-jet modified as per Cliff Ruggles book. 87 F350 6.9 4 speed dually A poor man has poor ways. |
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#17
12-11-2014, 07:09 AM
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Sorry, forgive my fat fingers, yes I know there 3.25" mains.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#18
12-11-2014, 10:47 AM
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400 or 428
Thanks everyone for all of you're answers,I know now that it's a 400 and that i've been E-RAPED.The guy I bought it from says that the numbers matched,which they didn't.I guess I'll try to get in touch with e-bay somehow.Thanks again.Tim.
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#19
12-11-2014, 11:00 AM
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Did you use pay pal?They usually side with the buyer.Tom
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#20
12-12-2014, 01:11 PM
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Is there anything wrong with using block
for bigger cubes if that is what was expected for the purchase of a 428 engine?
Wouldn't the smaller main journals be beneficial and using main studs provide adequate strength? I thought that this would be something that could turn a bad situation into a good one since the buyer did not receive what he expected. |
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