1967 429 intake manifold leaking - Cadillac Forum - Enthusiast forums for Cadillac Owners

Vintage & Classic Cadillacs 1902-1977 Cadillac Models

Thread Tools Search this Thread
Old 09-22-2017, 09:11 PM
Junior Member
Thread Starter
Join Date: Jan 2017
Posts: 1
Default 1967 429 intake manifold leaking

I have a 67 coupe Deville with a 429, I have done this intake manifold 4 times now and it still leaks. The motor has about 6000 miles but it did sit for 16 years. The heads were redone by Wayne's engine rebuilding about 150 miles ago and i have 180 psi on all 8 cylinders. I had just recently (before this install) had the intake resurfaced. I had it magnafluxed by another place and they said there were a few minor cracks and didn't seem to go all the way through, they did seem a little shady. I shimmed the heat riser ports on this install with 24 gauge stainless steel. I was having problems with fuel boiling over in carb due to too much heat. I have ran it and drove it and it seems to run actually better than it ever has but there is still a constant shake in the motor. I have the timing set at 8 degrees btdc, there is a modified cam in motor. No matter what I do with air mixture screws I cannot get it to level out. I sprayed starter fluid at ports that connect to head and it almost dies, same thing it has always done ever time I redo the gaskets. Is there any manifolds that will bolt to this engine with spacers of any kind? Is there anyone who builds manifolds for this motor? I'm willing to try anything at this point, any help would be greatly appreciated.

Last edited by Freddymac; 09-22-2017 at 10:49 PM. Reason: Misspelling
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
1993 Fleetwood 5.7L 350cid intake manifold? BondGoddess Small Block V8s 0 10-25-2014 12:13 AM
exhaust Manifold 1965-1967 429 engine 1967caddi Private For Sale/Trade Classifieds 1 07-14-2012 11:04 AM
Intake Manifold Cleaning DJWerkz Cadillac Seville 0 03-04-2011 06:46 AM
1993 Allante Engine has loud pop when starting - intake manifold cover plenum [email protected] Cadillac Allante 1993 Phase III & VJ4 2 09-19-2010 10:28 PM
Intake Manifold Brandon2396 Engine Specific 2 07-20-2008 11:36 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Featured Sponsors
Vendor Directory

All times are GMT -5. The time now is 09:45 PM.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.