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Username Post: Oil pickup tube to pan clearance        (Topic#116996)
Snafoo 
Member
Posts: 34
Snafoo
Loc: Ennis, Texas
Reg: 04-30-04
11-15-05 06:36 PM - Post#817261    

I've read several places that the clearance should be 3/8" to 1/2" max between the pan bottom and the pickup tube. I mounted the new oil pump and the pickup tube that was originally on my 454 engine. The distance from the bottom of the pan to the gasket edge = 8 3/4".
The distance from the block deck to the (level) pickup tube = 7 1/4". I compaired the old and new oil pumps and they are the same size. If I swing the pickup tube closer to the pan bottom it is nolonger level.
Any suggestions are welcomed.

'77 GMC High Sierra Swapping out 350 for a 454 Stepside from Lake Tahoe area


 


Anonymous 

Re: Oil pickup tube to pan clearance
11-15-05 09:02 PM - Post#817262    
    In response to Snafoo

are you saying the pickup is 1.5" from the bottom of the pan? if so you have HD truck pan that needs a different pickup



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17390
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
Re: Oil pickup tube to pan clearance
11-16-05 03:09 AM - Post#817263    
    In response to

there are DOZENS of oil pump pickup designs available, you obviously need to change the pickup. theres even kits available to build a custom length/design

http://www.milodon.net/main.htm

http://store.summitracing.com/default.as...mp;autoview=sku

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
Anonymous 

Re: Oil pickup tube to pan clearance
11-16-05 04:40 AM - Post#817264    
    In response to grumpyvette

GM part# 3955283 pickup will give you 6.05" from the pump mounting surface to the lowest point of the pickup screen.



 
Snafoo 
Member
Posts: 34
Snafoo
Loc: Ennis, Texas
Reg: 04-30-04
Re: Oil pickup tube to pan clearance
11-16-05 04:49 AM - Post#817265    
    In response to

Thanks again grumpyvette and you too motorman.
Yes motorman that is what I am saying.

I went to summitracing.com and their stock oil pans only went up to 7.5" in depth. Are SBC & BBC pickup tubes interchangeable?

This engine came out of a 1986 3/4ton suburban and it also has an oil cooler adaptor between the block and the oil filter. Would that account for the bigger pan? And I thought the accessory pulleys where going to be the biggest problem with this swap. I really appreciate your help. I really want to do this engine right. It would probably help if I knew what I had to start with.

Thanks for the replies.



 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17390
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
Re: Oil pickup tube to pan clearance
11-16-05 05:35 AM - Post#817266    
    In response to Snafoo

small block oil pumps generally but not in all cases have 5/8" pickup tube dia. while BIG blocks generally but not in all cases have 3/4" pickup tube dia.
keep in mind that in many cases the big block pump can be bolted onto and used on the small block engine (a comon mad) and that you need to carefully check clearances on the oil pump,oil pump drive shaft to distributor length and pan to pickup clearances in all oil pump installations

IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!


 
grumpyvette 
Senior Chevytalk Moderator -- Performance Subject Matter Expert --
Posts: 17390
grumpyvette
Age: 71
Loc: FLORIDA USA
Reg: 03-16-01
11-16-05 05:39 AM - Post#817267    
    In response to Snafoo

small block oil pumps generally but not in all cases have 5/8" pickup tube dia. while BIG blocks generally but not in all cases have 3/4" pickup tube dia.
<br />keep in mind that in many cases the big block pump can be bolted onto and used on the small block engine (a comon mod) and that you need to carefully check clearances on the oil pump,oil pump drive shaft to distributor length and pan to pickup clearances in all oil pump installations
<br />
<br />braze the pick-up tube to the pump body so the pick up is 3/8" MINIMUM, 1/2" maximum from the oil pan floor and use a large lump of MODELING CLAY (every mechanic should have some its great for checking clearances)on the pickup then install the pan temp. with no gasket and remove to measure the thickness of the clay
<br />your local arts/craft store sells it in 1 lb blocks I usually use brite blue or black but suit your self, a digital caliper or even a ruler will get you the thickness measurement your looking for)
<br />
<br /><a href="http://store.yahoo.com/teacher-parent-store/ modelingclay.html" target="_blank">http:/ /store.yahoo.com/teacher-parent-store/ modelingclay.html</a>
<br />
<br /><a href="http://www.guildcraftinc.com/ProductInfo.aspx?productid=102-500" target="_blank">http:/ /www.guildcraftinc.com/ProductInfo.aspx?productid=102-500< ;/a>
<br />
<br />once its correctly possitioned ,<b>remove the bye pass spring and gears from the oil pump,and have the pick-up brazeD or welded to the pump body, then after it SLOWLY AIR cools (DON,T DROP IT IN WATER LET IT AIR COOL)replace the byepass spring and gears, lube the pump,with assembly lube on the gears, check the clearances, check clearances again! and install! just be damn sure its brazed or welded in the correct location as that 3/8"-1/2" is critical to good oil voluum feeding the pick-up
<br /><img src="http://www.jegs.com/photos/710oilpumps.jpg">
<br />
<br /><img src="http://stockcarracin g.com/techarticles/134_0309 _pump_03_z.jpg">
<br /><a href="http://users.erols.com/jyavins/solder.htm" target="_blank">http:/ /users.erols.com/jyavins/solder.htm</a>
<br /><a href="http://www.tinmantech.com/html/faq_brazing_vers us_soldering.html" target="_blank">http:/ /www.tinmantech.com/html/faq_brazing_vers us_soldering.html</a>
<br />
<br /><a href="http://www.epemag.wimborne.co.uk/solderfaq.htm" target="_blank">http:/ /www.epemag.wimborne.co.uk/solderfaq.htm</a>
<br />
<br />silver soldering is basically lower temp brazeing , the soldering metal flows over the surface and into micro cracks in the surace of the other metal forming a almost unremoveable bond to the other metals surface it allows you to stick iron to steel or brass to steel, it works more or less like normal solder does on copper but at higher temps and has a much stronger grip in addition too working on iron and steel
<br /><img src="http://stockcarracin g.com/techarticles/134_0309 _pump_04_z.jpg">
<br /><img src="http://stockcarracin g.com/techarticles/134_0309 _pump_02_z.jpg">
<br />I vastly prefer the 5 BOLT BBC style pumps with the 12 tooth gears and thier larger 3/4" pick-up VS the small 4 bolt pumps with thier 5/8" pick-ups and 7 tooth gears. the oil flow is both higher pressure at low rpms and smoother in pulse presure spread,no! you don,t need it on a non-race combo, or even on some race combos but its nice to have and I willingly will loose a few hp pumping oil for better engine lubracation

http://forum.grumpysperformance.com/viewtopic.php?f=54&t=2187



Edited by grumpyvette on 08-26-13 10:51 AM. Reason for edit: No reason given.

 
Snafoo 
Member
Posts: 34
Snafoo
Loc: Ennis, Texas
Reg: 04-30-04
Re: Oil pickup tube to pan clearance
11-16-05 11:43 AM - Post#817268    
    In response to grumpyvette

Thanks for your help guys.

I talked to my Chevy parts guy and he said I have - G.M. 6qt LS6 /Truck Mark IV Big Block Chevy Oil Pan - GM Part# 14103141.
Detailed Description
This six quart oil pan was used on the last LS6 454 crate engines produced by GM., It was also used on all 1975-1990 Light Truck 454's. It will fit all 1965-90 Mark IV big-block Chevrolet engines.

8 3/4" deep - Requires oil pump pickup screen 14103147 or 12555167 High Volume oil pump with welded pickup screen.

Oil pickup screen # 14103147 ordered and will be here tomorrow.

This place is the best!

'77 GMC High Sierra Swapping out 350 for a 454 Stepside from Lake Tahoe area


 
san 312 
Senior Member
Posts: 119
san 312
Loc: il,
Reg: 07-11-04
Re: Oil pickup tube to pan clearance
11-16-05 02:45 PM - Post#817269    
    In response to Snafoo

I have question? its alittle off base but related to this subject. Do you guys recomend using a steel shaft on the oil pump , the piece that the distributor rod connects too, or the plastic retaining clip.

You can never pay to much for your dreams.......


 
Anonymous 

Re: Oil pickup tube to pan clearance
11-16-05 02:59 PM - Post#817270    
    In response to san 312

Quote:

I have question? its alittle off base but related to this subject. Do you guys recomend using a steel shaft on the oil pump , the piece that the distributor rod connects too, or the plastic retaining clip.


all SHP BBC used a steel retainer from the factory



 
san 312 
Senior Member
Posts: 119
san 312
Loc: il,
Reg: 07-11-04
Re: Oil pickup tube to pan clearance
11-16-05 03:04 PM - Post#817271    
    In response to

I should've been more clear, I'm building a 327 , I'm not running with the big boys yet. But Thanks for the reply.

You can never pay to much for your dreams.......


 


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