Hi all,

Have finally got my manifolds back on my engine, including a new manifold heat control valve. I'm delighted to say there are no leaks or hisses and it sounds a lot better.

Trouble is, when it heats up, the valve seems to seize up. It takes a fair bit of force by hand to turn, and remains in whatever position you leave it in. When it cools it returns to being nice and smooth. It seems like differential expansion or distortion or somthing is causing it.

It has new bearings which have been reamed as the instructions said to.

I have to admit, there is none of the Chrysler solvent on it yet - but does that really make an enormous difference (other than for long term maintenance)?

All info greatly appreciated.

All the best 60Ply

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1960 Plymouth Belvedere 4 door sedan
Stock 60 225
Push button 3 speed Torqueflite
Right Hooker

Slant Six Dan Swears by the Chy Solvent. Are the bearings not seated far enough and creating a bind when the heat expands it?
Just a thought,
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

Hi Frank,

The bearings are seated just where they should be according to the instructions. I'm calling Chrysler in a minute to see if they can get hold of the stuff, they didn't know what I was talking about a few days ago but I have the part number now.

I've got a feeling the manifold may need to be pulled and the bearings reamed out a little more, but that can wait till after I get hold of the solvent and try it.

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1960 Plymouth Belvedere 4 door sedan
Stock 60 225
Push button 3 speed Torqueflite
Right Hooker

Do you have the spring shown here in place?

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1960 Seneca 225 turbo soon to be EFI

After a few weeks of use it seemed to smooth out on its own.

Not sure how that happened but it worked for me.

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1960 Plymouth Belvedere 4 door sedan
Stock 60 225
Push button 3 speed Torqueflite
Right Hooker

I bought a Mopar exhaust manifold for my slant a while back and it had that spring, but I noticed when dis-assembling my engine for my rebuild that it's gone. What does it do anyway, by the looks of it it seems like it serves no purpose, but I know it does, but what???

because of the heat and rust the manifold is subjected to, washers or circlips to center the butterfly would probably bind. The spring serves to passively index the butterfly to center.

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1960 Seneca 225 turbo soon to be EFI

Its also an anti-rattle spring that keeps tension on the shaft as the bearings wear.