Chris,
1600 or 2000? Year? If '68 or later? If so, smog equipment removed? Header
or stock manifold?
How do you know it's an exhaust leak? 2000s with the air injection ports
plugged frequently make a "chirping" noise which sounds like an exhaust leak,
but is actually the exhaust pulses passing over the injection nozzle ports in
the head.
Stock 2000 manifolds crack along the center seam. On '68 and later, there is
supposed to a brace between the front of the exhaust manifold and the
alternator mount which relieves some of the strain on the manifold. It
incorporates a heat shield for the alternator, as well. It is usually missing.
I'm not sure about the '67s, or '68 and later 1600s, but I believe some sort
of heat shield was incorporated. I have no idea whether stock 1600 manifolds
cracked the way 2000s do.
Gary
________________________________
From: Chris Collett <cccracing@gmail.com>
To: datsun-roadsters@autox.team.net
Sent: Monday, October 27, 2014 5:35 PM
Subject: [Roadsters] Exhaust leak
I jave a minor exhaust leak somewhere near the cyl heaf ex. manifold are.
Not under the car at thw manifold to ex. pipe atea but higher up. Is this
a common problem? Are there any area that typically crack, or do I just
need to buy a gasket set and dig in.
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