multirotor

iTrader: (1)

I want to plug the water channels in the rotor housings that are used to pre-heat the intake manifold.
This allows me to swap intake systems without draining coolant every time.

Has anyone done this before ?
What did you use ? Plugs ? JB Weld ? ....

Any advise welcome !!

rotary emotions

tapping and screwing in allen head plugs with some thread sealant seems the best solution too me?

Rx7carl

20mm freeze plugs.

multirotor

iTrader: (1)

Tried some but can't get them in...
Engine is in a car so I don't want to enlarge the passage in the rotor housing.

I don't have the tools to tap a hole this big.

multirotor

iTrader: (1)

Would it help if I put the freeze plugs in the freezer first ? Is that why they are cold freeze plugs ?

multirotor

iTrader: (1)

not cold, "called".

rxtasy3

iTrader: (2)

This could be a good idea since the cold temp will shrink the metal a couple thousenths. They're designed to be a tight fit so they seal.

rotary emotions

They are called "freeze plugs" because they are supposed to pop-out when the coolant freezes, thus saving the engine block to crack/split/...
Putting them in the freezer might help, but I'm not very convinced.

Rx7carl

I've done it engine in the car. Its a little tricky to get it lined up right and started straight on. I use a deepwell socket that just fits inside the plug, that helps to hold it steady and aligned.

cosmicbang

Solid round stock? You could get piece 20 mm and hone off a little on one end so it fits in the hole then hammer it a little and cut off the excess. I did something similar to plug the oil hole in back.

MosesX605

What was the purpose for the coolant passages in the intake mani anyhow?

Jeff20B

iTrader: (13)

Emissions, and the stock carb was designed for it. Apearantly, the stock carb may not run as well with the coolant passages blocked.

Heat the rotor housings a little and freeze the plugs. They should go in a little easier.

82streetracer

iTrader: (1)

oh man, the freeze plug thing is the oldest myth evar.

if the coolant freezes in the block, the block IS going to crack,

a couple of small plugs poping out wont do ****.

the reason they are there is to release the sand or whatever when the block is cast.