Waterpump Paper Gasket

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D&T

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Does anyone know where to get replacement paper gaskets for Johnson Water pump, my model is 359 3655 and impeller code JP-09-1026B?.
I have spare impellers but no gaskets.
To keep the gasket in place while fitting do people use a bit of silicone grease/ fairy liquid? When dry they are difficult to keep in place and likely to damage.
Thanks for any help
 
D&T said:
Does anyone know where to get replacement paper gaskets for Johnson Water pump, my model is 359 3655 and impeller code JP-09-1026B?.
I have spare impellers but no gaskets.
To keep the gasket in place while fitting do people use a bit of silicone grease/ fairy liquid? When dry they are difficult to keep in place and likely to damage.
Thanks for any help
Click to expand...
Just stick it in place with smear of grease.

peteK said:
Easy enough to make one.
Click to expand...
Old Harry said:
Especially as a PBOer
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But it must be the correct thickness
 
A mechanic would laugh themselves silly these days at the thought of paper gaskets.
Use an RTV. (room-temperature-vulcanizing silicone)


 
Mercury Rising said:
A mechanic would laugh themselves silly these days at the thought of paper gaskets.
Use an RTV. (room-temperature-vulcanizing silicone)


Click to expand...

These days ? RTV silicon has been around for decades. It does have some uses, but it's hardly a replacement for all paper gaskets. I wouldn't use it on a raw water pump, where the thickness of the gasket is important.
 
PaulRainbow said:
These days ? RTV silicon has been around for decades. It does have some uses, but it's hardly a replacement for all paper gaskets. I wouldn't use it on a raw water pump, where the thickness of the gasket is important.
Click to expand...
The thickness of the gasket is important if you need maximum head from the pump. If all the pump is doing, is circulating cooling water round an engine, it's hardly critical. I've used anything between brown paper, and a corn flakes packet. (Other cereals are available).
 
Proper gasket material is presumably still available from motor parts shops?
On things like a water pump, I stick the gasket to the cover with gold hermatite and grease the other side.
I think this give the best chance of removing the cover and preserving the gasket.
Thickness wise, the impeller should be a close fit, but the pump will have worn by now? There will be some tolerance.
 
I have had sheets of gasket material for years. I think the only source these days is on-line.
I agree that RTV is just as good, if not better than gaskets. The only really critical flanges are those on older cars like Minis where the gasket was part of the diff bearing loading. Even then it's the shims that makes the fine adjustment.
 
I've just measured the thickness of some spare paper gaskets that I have for myJohnson pump. 0.005 inch! I doubt that, in reality, a thou or so difference either side of that will make much difference to the pump's performance. Gaskets such as the one in question exist solely to fill minor irregularities in mating surfaces and thus eliminate possible leakage paths for either water from the pressure side of the pump or, more likely, air leaking in on the suction side. I guess that most of us reuse these gaskets after inspecting or replacing the impellors, on the basis that if it doesn't leak and water flow looks adequate, it'll be OK. That's why i seem to have accumulated a few "spare" gaskets over the years. I would certainly agree with those who advocate judicious use of grease on the gasket surfaces, provided of course that it is silicon based. Some of the materials used in the manufacure of impellors don't take kindly to contamination by oil based products. Any surplus grease exuded from the joint during replacement of the cover may lie on the impellor surface for some considerable time before the pump is put into service. For similar reasons i would consider it unwise to use a liquid gasket material.

MIke.
 
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