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Author Topic:   Got Buick?
Pit Bull
Dirt Full Roller

Total posts: 42
posted July 05, 2001 11:03 PM
Okay so I just dropped a Buick 455 in my Chevelle. It ran like a streak during hot laps, then siezed up when I pulled into the pits. I took it apart a few days later, and found out that it spun the rod bearings on the number 5 and 6 cylinders. It had decent oil pressure during hot laps 25 lbs or so, but the strange thing is that it didnt really change with throttle, it just stayed constant. Im getting ready to rebuild it, and would like to know if any of you guys know any buick tricks to make my motor live. PLEASE HELP!!

Pickles
Dirt Full Roller

Total posts: 32
posted July 08, 2001 05:54 PM
On a 500 Cad I narrow the rods so that there is .035 clearance for each pair of rods.

Pickel
Dirt Freak

Total posts: 239
posted July 08, 2001 08:40 PM UIN: 25419780
Make sure you have plenty of rod clearance and it should take care of your barren problem. I use to run a Pontiac motor and I was told it would seize up if I didn't. I run about .0020 rod clearance.

widebody
Dirt Full Roller

Total posts: 74
posted July 11, 2001 12:04 PM
rod bolts, rod bolts, rod bolts.
Oh yeah dont forget to use good rod bolts.

thats probably why they spun in the first place.

cas23
Dirt Roller

Total posts: 14
posted July 12, 2001 10:51 PM UIN: 25501394
In the early or mid 70's buick changed to bigger oil galleries in the block. this helps a bunch. the front cover is different also.it has bigger holes in it. and get ahold of TA performance they specialise in buicks and sell the high volume pumps.

Pit Bull
Dirt Full Roller

Total posts: 42
posted July 14, 2001 12:49 AM
By rod clearance do you mean the space between each set of rods or the space between the bearing and crankshaft? How much rod clearance do I need?

Oldsmobile13
Dirt Full Roller

Total posts: 66
posted July 14, 2001 01:12 AM
Do these 455s really run with the 383s and 355s? I always thouht they would be alot more likely to get hot. Will they hook up on a dryslick track, I am very curious because I have several

Pickel
Dirt Freak

Total posts: 239
posted July 15, 2001 09:52 AM UIN: 25419780
pit bull
you want rod clearence between rod and crank .. side clearence.. I always ran about .0020 on mine..

Pickles
Dirt Full Roller

Total posts: 32
posted July 15, 2001 03:24 PM
Pickel, did you mean 20 ten thousandths (.0020)or 20 thousandths (.020)?

4ord
Dirt Full Roller

Total posts: 34
posted July 16, 2001 10:40 AM
We ran a 455 Buick in a mod several years ago. To overcome the oiling problem created by the small oil feed galley in the block, we ran an external [-12] line from the pump to a pickup which was welded in the pan. This motor makes gobs of torque and would work good on a momemtum type of track. On a stop and go type of track they're not worth a darn. Maybe it's that 70 lb. crankshaft.

Pit Bull
Dirt Full Roller

Total posts: 42
posted July 16, 2001 11:57 PM
HEY 4ord--

Ive heard from some of the local guys around here that the pump needs to be able to pick up more oil. Ive already purchased a Miloden oil pump (high pressure) and need to know where you tapped into the oil pump for the external feed line. Did you drill and tap into the side of the oil pump, or did you tap into the block just near the oil pump? How big was the line you ran and what type was it (steel, rubber, braided??) PLEASE HELP ME!! I need to have this motor rollin by this weekend!!

4ord
Dirt Full Roller

Total posts: 34
posted July 17, 2001 12:27 AM
Pit Bull,
As I recall. We welded an aluminum fitting to the suction side of the pump. We used a pan kit for a small block Chevy [for the trap doors and RS kickout] and welded it to stock pan, and welded the pickup in RR corner of pan and welded steel fitting to the pickup tube. We used -12 [3/4 inch ID] braided line from the pump to the pickup. If you do this make sure to plug the galley in the block. We used a small freeze plug at the front of the block. I know this sounds rather involved, but we never had any kind of oiling problems after this.

Pit Bull
Dirt Full Roller

Total posts: 42
posted July 17, 2001 12:42 PM
Did you use steel braided or nylon braided line?

4ord
Dirt Full Roller

Total posts: 34
posted July 17, 2001 04:11 PM
Steel, You don't want this line to suck shut.

Pickel
Dirt Freak

Total posts: 239
posted July 17, 2001 08:48 PM UIN: 25419780
Oops sorry about that I meant .020

Pit Bull
Dirt Full Roller

Total posts: 42
posted July 18, 2001 12:20 PM
My dad found a 5/8 inch drill bit that we are using to drill out the oil passage in the block. The stock passage was a little under 1/2 inch, so this will improve flow considerably. I think this will be enough oil since I dont plan on spinning this motor over 5,000 rpm ever. I am also going to build a larger oil pickup tube. If I ***** this up (like break the bit in the block or punch through the casting) then I will go external with the line. Ill give you guys an update on how it all went when I am finished. Thanks for all your help!! I really appreciate it!!

Pit Bull
Dirt Full Roller

Total posts: 42
posted July 19, 2001 01:40 PM
I sucessfully drilled out my oil pickup line. My question is what I should make my oil pickup tube out of. I would like to use soft copper like you use for plumbing in your house because it is easy to work with and can be brazed easily. Will soft copper work as an oil pickup tube? Thanks in advance..

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