The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-11-2018, 04:22 PM   #1
Bluejoe
Registered User
 
Join Date: Feb 2018
Location: South Plainfield NJ
Posts: 8
Intake manifold bolts

Hello members Im installing new intake gaskets on my 89 K5 Blazer with
350 TBI. I have to purchase new bolts due to old ones being corroded and rusty. They are 3/8. What is the max length I can go with ? I know too long they will interfere with some of the pushrods. Thanks for any assistance.
Bluejoe is offline   Reply With Quote
Old 02-11-2018, 07:02 PM   #2
Macdaddy1
Senior Member
 
Join Date: Dec 2017
Location: Niceville Florida
Posts: 205
Re: Intake manifold bolts

I just looked that up for my 327 and they said 1 inch is the longest to use. I just googled it and came up with lots of responses and I checked a few to make sure they were all saying the same length. I don't know if 1 inch is the right length for yours though.
Macdaddy1 is offline   Reply With Quote
Old 02-11-2018, 08:07 PM   #3
YoungPup1977
Registered User
 
Join Date: Jun 2015
Location: North Carolina
Posts: 490
Re: Intake manifold bolts

I would measure the original ones that came out of the intake and go with that. maybe take one of the originals with you when you go to ACE hardware and get 16 of them...this way you won't bend a pushrod with a bolt that was to long....
YoungPup1977 is offline   Reply With Quote
Old 02-12-2018, 09:57 AM   #4
Bluejoe
Registered User
 
Join Date: Feb 2018
Location: South Plainfield NJ
Posts: 8
Re: Intake manifold bolts

I couldn’t find old ones probably tossed them. I took the grinder to the bolts made
them 1–1/8” long. This plus a washer I’m in the 1”-1-1/16” length range. It just appears to me 1” bolts with a washer are too short.
Bluejoe is offline   Reply With Quote
Old 02-13-2018, 01:09 AM   #5
Captainfab
60-66 Nut

 
Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 21,246
Re: Intake manifold bolts

I'm thinking the intake bolts should be 1-1/4" long.
__________________
Power Steering Box Adapter Plates For Sale HERE
Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE
Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE
Hydroboost Mounting Plates HERE
Captainfab is offline   Reply With Quote
Old 02-13-2018, 01:57 AM   #6
kwmech
Senior Member
 
Join Date: Mar 2003
Location: Colfax-California
Posts: 5,182
Re: Intake manifold bolts

1-1/4'' like the Captain said, they won't hit the center pushrods. If you're worried, look at them with the valve cover off
kwmech is offline   Reply With Quote
Old 02-13-2018, 08:02 AM   #7
Bluejoe
Registered User
 
Join Date: Feb 2018
Location: South Plainfield NJ
Posts: 8
Re: Intake manifold bolts

Hello morning I completed the job yesterday and all is well engine running nice. Now on to the next project steering box and tailgate window cable. Thanks for the assistance everyone
Bluejoe is offline   Reply With Quote
Old 02-13-2018, 08:16 PM   #8
DieselSJ
Registered User
 
Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 395
Re: Intake manifold bolts

Teflon paste on the threads will keep oil from creeping up the threads of the center bolts and creating leaks onto you intake.
__________________
87 R30 CC Dually, 454, TH400
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
DieselSJ is offline   Reply With Quote
Old 02-14-2018, 07:48 AM   #9
Bluejoe
Registered User
 
Join Date: Feb 2018
Location: South Plainfield NJ
Posts: 8
Re: Intake manifold bolts

If they were to leak thru would it be a good idea or not to remove one bolt at a time to apply Teflon paste. I did place a dab of silicone on each bolt before hand. I went over the bolts several times afterwards with the torque wrench making sure they were fully set.
Bluejoe is offline   Reply With Quote
Old 02-14-2018, 03:41 PM   #10
DieselSJ
Registered User
 
Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 395
Re: Intake manifold bolts

Quote:
Originally Posted by Bluejoe View Post
If they were to leak thru would it be a good idea or not to remove one bolt at a time to apply Teflon paste. I did place a dab of silicone on each bolt before hand. I went over the bolts several times afterwards with the torque wrench making sure they were fully set.
You should be fine if you put some silicone on the threads. If you have an existing engine that leaks, you can do the one bolt at a time trick to stop the leak.
__________________
87 R30 CC Dually, 454, TH400
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
DieselSJ is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:03 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1997-2013 67-72chevytrucks.com