| [GMCnet] Exhaust manifold flange spring bolts length? [message #344351] |
Wed, 19 June 2019 12:56  |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Hi All,
On a stock 1978 with a 403, how long should the exhaust manifold flange spring bolts be? I had pulled up that they are 3/8-16 x 1 3/4. I had several of those as "HELP" brand so I put them in on one side, and the spring is near completely compressed. Should there be more 'play' in the spring, such as by using a 2" or 2 1/2" bolt? Or should the spring be near completely compressed?
Thanks,
-Dave
1978 Transmode near Pittsburgh
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Exhaust manifold flange spring bolts length? [message #344353 is a reply to message #344351] |
Wed, 19 June 2019 15:13  |
lqqkatjon
Messages: 2324
Registered: October 2010
Location: St. Cloud, MN
Karma: 5
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Senior Member |
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I think the dorman one's I had used where that way. needed to clamp to get them started, and they seemed to be fairly compressed.
or at least that is what I kinda remember- it has been a few years.
Jon Roche
75 palm beach
EBL EFI, manny headers, Micro Level, rebuilt most of coach now.
St. Cloud, MN
http://lqqkatjon.blogspot.com/
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