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#1 |
71 DELUX
Join Date: Sep 2003
Location: Northern CA / Sac
Posts: 1,056
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intake manifold bolt size ?
What is the size of the intake manifold bolts on a typical 350 stock motor?
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5/4 drop LWB wood bed - 15x8 front 235/60 - 15x10 rear 295/50 2003 FORD Escape 1998 Honda VTR1000 |
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#2 |
Is a bullfrog waterproof?
Join Date: Nov 2000
Location: OLATHE, KANSAS
Posts: 1,130
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I'm 99% sure they are 3/8 x 16 but don't remember the length. They take a 9/16" socket or box end wrench.
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#3 |
71 DELUX
Join Date: Sep 2003
Location: Northern CA / Sac
Posts: 1,056
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length
anyone know the length? I suspect that I have a short one, but don't really want to pull another to find out
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5/4 drop LWB wood bed - 15x8 front 235/60 - 15x10 rear 295/50 2003 FORD Escape 1998 Honda VTR1000 |
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#4 |
Senior Member
![]() Join Date: Sep 2001
Location: Seattle, WA, USA
Posts: 5,817
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Can't be more than an 1" and a half. ARP intake bolts (that I use exclusively) are I think 1" in length and have a reduced 3/8" head on them. That, and they're stainless chrome plated.
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'69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA. |
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#5 |
Fabricate till you "puke"
Join Date: Jun 2002
Location: Ill
Posts: 9,403
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be carefull not to go too long.....there are a couple places that the bolts will interfere with the pushrods
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69 longhorn,4" chop,3/5 drop, 1/2 ton suspension/disc brakes,1 1/2" body drop,steel tilt clip, 5.3/Edelbrock rpm intake/600 carb, Hooker streetrod shorties,2 1/2" exhaust/ H pipe/50's Flows , 6 spd Richmond trans,12 bolt/ 3.40 gears.... |
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#6 |
71 DELUX
Join Date: Sep 2003
Location: Northern CA / Sac
Posts: 1,056
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reason I am asking
Did my frist oil change in this truck o' mine last week. Got it up to the proper level and (of course) my pesky leak that gives me a small pool oil on the intake manifold came back...with a vengeance.
What was for a short time a drip or two, is now a 3-4" stain. A few weeks ago I was told here that the bolts on the manifold can be the reason for these puddles. I removed and cleaned my (long tall) oil filler neck and when I put it back I used a shorter bolt that what was there before, just for ease of re-installation. If these bolts can be part of leaking problems, then I may have made the problem worse with the shorter bolt! ![]() Also, now that the I can see this leak clearly, I am reasonably sure that it is the leak causing my drip, not the pan as I originally suspected. It actually leaks, burns and smokes (where burning) then drips after the truck is shut off. |
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#7 |
Too many is never enough!
Join Date: May 2003
Location: Idaho Falls, ID
Posts: 455
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bolts
1 1/4" is your max length on the bolts to avoid interference with the push rods. Try putting a little RTV on the threads before you install them to give em a better seal.
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Jason 1968 K10 SWB Fleetside 1971 K2500 GMC LWB 1968 K20 (later frame, donor body) 1972 C20 LWB parts truck 1993 K2500 Suburban, tow rig, 454, 4L80E NEW!! 18' Siem's car hauler 2004 Honda Odyssey (family man!) |
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#8 |
CCRider
Join Date: Feb 2000
Location: Olive Branch,MS,USA
Posts: 2,232
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The four bolts in the center of the manifold by the heat riser will always leak if you don't put sealer on them
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72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS |
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#9 |
68cst_ss490
Join Date: May 2001
Location: edmonton,canada
Posts: 1,363
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By a set of arp intake bolts and new gaskets...then b sure to use some liquid teflon thread sealer on every set of threads. Its a sure fire way to prevent the oil and coolant from seeping upwards
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Dean edmonton,canada a winter wonderland 2005 Chevrolet Avalanche LT cold air intake, performance exhaust, Comp cams cam, jba shorty ceramic headers. http://www.cardomain.com/ride/3090973 |
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#10 |
71 DELUX
Join Date: Sep 2003
Location: Northern CA / Sac
Posts: 1,056
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still have mystery bolt though
Don't know what this is yet, but I asked this question once before.
The driver's side of the intake manifold, just beneath the carb is where I have the seeping oil. Of those two bolts, the one toward the front of the truck is not a bolt at all, but it is a fitting. The fitting has a line attached to it, a rubber hose that extends over to the front of the engine, into the block, right near the water pump. I'd really love to just block this line, but I don't know what the heck it is! Coolant line? Still have not been able to take a good picture of it. |
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