Old style 5kq 'round' TB seized

Cody Forbes cody at 5000tq.com
Wed May 28 07:08:51 PDT 2008

Bares, Vittorio wrote:

> What we are theorizing is potentially that severe heat from the turbo
> and the manifold might be contributing to the failures. We were
> running excessively lean to the point where the exhaust manifold was
> glowing red. We believe the lean issue was a combination of the bad
> bearing in the TB and a bad fuel pump setup.

The manifold (and turbine housing) glow red under normal 'hard' use no 
matter what the fueling situation is. That's just how it is with turbo's, 
the exhaust back pressure before the turbo makes the EGT's very hot.

-Cody Forbes
'87 5ktq - Fast.
'87 5ktq QLCC'd plus some
'86 5ktqCD
'86 5k
'86 5k 

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