Arghhhh Harada Intake Manifold

[240260280]

Well I am installing one for a friend on my recommendation but what a piece of $^!#!!!!!!!!!!!!!!!!!!!

 

It does not fit!!!!!!!!!!!!!!!!

 

I've installed several Cannon, TWM, and even a Lynx but this is the first fitment problem.  It looks great and performs well mechanically but come on!!!  The Cannon that it replaced works fine.

It will not fit properly against the header flange AND the stand-off for the rod hits the thermostat housing fittings.

P O S !!!!!!

 

 

 

[HS30-H]

I've used, fitted and supplied umpteen Harada Shokai inlet manifolds over a couple of decades or more, and never had any major problems with them.

Any inlet manifold/exhaust manifold interface has usually been the fault of the exhaust manifold flanges being way bigger than they need to be and/or too thick/thin,  and any inlet manifold/thermostat housing interface has been due to either incorrect user assembly of the linkage (getting the return spring clamp round the wrong way/not even understanding how it works) or a slight amount of clearancing being necessary due to the wide variation in thermostat housing shapes/castings.

The linkage parts - especially the linkage arms - are not as good as they used to be (I preferred the old cast items), but I don't see any alternative.

In my experience they are very far from being the "POS" that you claim this one to be. So my money's on the Harada, not you. 

[cgsheen1]

Ouch...

[240260280]

 Cannon fits, the Harada does not.... it binds in two locations.

The part marked in red is tight against the thermostat housing. I now have to find an early one with no fittings on that face.

 

 

 

 

 

[SteveJ]

It sounds like you might need some advice from @Mike W or @Zedyone_kenobi

 

[Zedyone_kenobi]

LIke a bolt of lightning from a distant cloud!  Zedyone is here!

 I will go take a few shots of what I did and get back to this thread.  I have been running the Harada for years... I love the fact that it uses the stock linkage. I shall get back to this thread today!!!

 

HUZZAH

[SteveJ]

Interestingly enough most of the photos I could find of the Harada installed on an L series are the ones posted on this site.

[HS30-H]

10 minutes ago, SteveJ said:

Interestingly enough most of the photos I could find of the Harada installed on an L series are the ones posted on this site.

Have a couple more on me:

 

[240260280]

Thanks Alan!

I'll install w/o the thermostat housing then grind off the unused hose fitting on the side of the housing that interferes and weld shut to prevent leaks.

I have ~ 6 spare thermostat housing but none w/o side fittings.  The later 260 and 280z have even more bits on the side.

 

Here is an internet picture of a similar protruding fitting:

 

[240260280]

I found at thread (pun too) by @Captain Obvious where he used a 1/2" -14 NPT tap to fit in the BSPT followed by a fitting. I'll do this but us a 1/2"-14 plug to remove the interference:

 

 

[Mike W]

Well I just checked my install as I do not recall any interference problems.  I ended up plugging that hole with an allen wrench style fitting and it just clears the manifold by about a millimeter or so.  Here a few pictures to illustrate.

 

[240260280]

Thanks Mike!  Yup you seem to have the side ports plugged. The two that I have are different in that they have fittings on the side ports and they interfere.

 

btw cool arp bolts on the thermostat housing!  First class!