Found the problem ...at last

[V Mad]

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DJT wrote:

Mike,

Some reading here which describes my similar experience a couple of years ago:

http://stagownersclub.mywowbb.com/forum1/227.html

If the jackshaft gear is even slightly worn, it will soon make toast of another pump. Check it thoroughly and, if unsure, get either a new one or a known good s/hand one. Be very thorough about flushing any debris out.

Dave

I would agree. It is difficult to assess the condition of the jackshaft gear while fitted in the block. Iwould remove it and give it a close inspection. I have seen gears that look OK until you look closeley and then realise the teeth have worn to a sharp edge.

[Westfaling]

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Guys
I looked up the SOC water pump test and I'm not sure I read that the 6 vane pump was more efficient. The 12 vane pump definitely flowed more water. Pretty sure BLMC wouldn't have changed to a lower flow pump given all the overheating concerns.
Nick

[Mike Harding]

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I want to see if I can get up and running, so I am going to go with the 6 vein as I have it spare and the 12 is still on the worn shaft.

Everything looks very clean internally and I have a good feeling that as I have the rad as good as new, a new stat (which I'll test first) working pump etc I am hoping to bolt it back up and keep fingers crossed!

Steep learning curve !

Mike

[Mike Harding]

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I want to see if I can get up and running, so I am going to go with the 6 vein as I have it spare and the 12 is still on the worn shaft.

Everything looks very clean internally and I have a good feeling that as I have the rad as good as new, a new stat (which I'll test first) working pump etc I am hoping to bolt it back up and keep fingers crossed!

Steep learning curve !

Mike

[Mike Harding]

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Good news, new pump is on and working fine, loads of flow, no overheating fantastic, Bad news, I have a small lake under the inlet manifold!

I used new gaskets and cleaned off about 2kg of instant gasket so everything was really nice and clean - but I have a major leak and can't see where it is from.

After removing everything again the pump housing and gasket seem bone dry, any suggestions?

Would you normally reassemble using a hylomar or similar gasket sealer? This was a steady trickle from the back of the V but there is no way of seeing where it is coming from! I am guessing inlet manifold leaking somewhere... any ideas anyone, is there something I have missed or a trick I don't know. It ran perfect, started immediately and didn't get too hot, sat there at about 80 degrees, blower motor throwing warm air etc.

Naturally I also found the next thing wrong too - RH rocker cover leaking like mad, down onto 1st plug, and no rubber stopper in the front of the rocker cover, you can put your finger through and feel the timing gear!

All good fun!

Thanks,

Mike

[Guest]

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Mike Harding wrote:

Good news, new pump is on and working fine, loads of flow, no overheating fantastic, Bad news, I have a small lake under the inlet manifold!

I used new gaskets and cleaned off about 2kg of instant gasket so everything was really nice and clean - but I have a major leak and can't see where it is from.

After removing everything again the pump housing and gasket seem bone dry, any suggestions?

Would you normally reassemble using a hylomar or similar gasket sealer? This was a steady trickle from the back of the V but there is no way of seeing where it is coming from! I am guessing inlet manifold leaking somewhere... any ideas anyone, is there something I have missed or a trick I don't know. It ran perfect, started immediately and didn't get too hot, sat there at about 80 degrees, blower motor throwing warm air etc.

Naturally I also found the next thing wrong too - RH rocker cover leaking like mad, down onto 1st plug, and no rubber stopper in the front of the rocker cover, you can put your finger through and feel the timing gear!

All good fun!

Thanks,

Mike

Hi Mike, good result, pleased to hear about it. What's wrong is half expected, and cheap and easy to fix. Firstly, try a set of thick manifoldgaskets, they may have been fitted after head work at some point in the past, if the manifold won't sit properly go back to the normal ones, use a silicone gasket cement in either case, but only on the heads, also, cam cover gaskets and half moons are easy to get and fit, silicone again on the cam covers, the gaskets arenot properly retainedin the covers. Enjoy Martin.