Recommendation for engine work
Discussion
Hoping to have it back for Brands at the end of the month. My understanding is that if the Aux shaft fails, both water and oil pumps area affected, so unless you are seeing erratic oil pressure it is unlikely to be a water pump issue.
I would start with replacing the least expensive items such as expansion tank cap, thermostat, temp sensor, radiator, before you consider an engine rebuild.
I would start with replacing the least expensive items such as expansion tank cap, thermostat, temp sensor, radiator, before you consider an engine rebuild.
ukkid35 said:
My understanding is that if the Aux shaft fails, both water and oil pumps area affected, so unless you are seeing erratic oil pressure it is unlikely to be a water pump issue.
I would start with replacing the least expensive items such as expansion tank cap, thermostat, temp sensor, radiator, before you consider an engine rebuild.
Thanks for that. Have changed all of the above but I can't get two miles without overheating. The top hose feeding the rad isn't getting very warm despite a new thermostat which is why the pump is on my list. You're right - it's a common rail with power steering, oil and coolant which is why I was wondering if the impeller had shredded itself. Could also be the start of a head gasket leak but the engine oil is fine. An odd one which is why I need someone with a bigger brain than I have to take a look....I would start with replacing the least expensive items such as expansion tank cap, thermostat, temp sensor, radiator, before you consider an engine rebuild.
philadcock said:
Could also be the start of a head gasket leak but the engine oil is fine.
No, it isn't head gasket. I was running my car summer last year whilst under head gasket failure denial. I was able to do individual laps of the Ring without overheating but it would use 2 litres of coolant per lap.It really does sound like no coolant circulation, is there any chance that debris could have got to the pumps, jammed them causing the water pump Woodruff key to fail, while allowing the rest of the Aux shaft to work correctly. Similar thing happened to me on a visit to the kitty litter in Zolder, the gravel was thrown up in the engine bay, jamming the exposed PS pump coupling causing the PS Woodruff key to fail.
I wonder whether there is any sort of flow sensor/viewer that could help diagnose this issue.
ukkid35 said:
philadcock said:
Could also be the start of a head gasket leak but the engine oil is fine.
No, it isn't head gasket. I was running my car summer last year whilst under head gasket failure denial. I was able to do individual laps of the Ring without overheating but it would use 2 litres of coolant per lap.It really does sound like no coolant circulation, is there any chance that debris could have got to the pumps, jammed them causing the water pump Woodruff key to fail, while allowing the rest of the Aux shaft to work correctly. Similar thing happened to me on a visit to the kitty litter in Zolder, the gravel was thrown up in the engine bay, jamming the exposed PS pump coupling causing the PS Woodruff key to fail.
I wonder whether there is any sort of flow sensor/viewer that could help diagnose this issue.
philadcock said:
I'm trying to get hold of an IR sensor to check the temp in the pipes, particularly the top hose once the thermostat opens. It will still be an engine out job to fix presumably (?)
Unfortunately the waterpunps are sandwiched between block and sump, so it's not just engine out, it's a complete rebuild - Sorry.plasticman said:
What about using an electric water pump in series .
I thought the same, but that would only work if the integral pumps were free to spin on the shaft (which is unlikely), otherwise they would restrict flow.If they not slipping and are being driven by the shaft, then there must be some other sort of restriction.
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