No oil pressure on newly rebuilt CJ engine

Sorry for the late reply. Been preoccupied with work.

So hopefully this should be the reason! thanks to a bit more of a strip down to access, found the pump to be at fault the key way on the gear had ground down or sheared off, no sight of the missing piece in the sump had a good look with an endoscopic camera nowhere to be seen. New pump being sent out, warranty still intact, just hope it’s not caused any damage to bearings only time will tell.


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It looks like the drive shaft may have pushed through the gear rather than sheared off, but I didn’t think there was sufficient clearance before the shaft hit the end cover. If it has sheared off, why? What does the end of cam look like? Incidentally, if that’s supposed to be a refurbished pump it looks decidedly tatty.

This is a rare occasion when you should remove the strainer, to clean out any debris.

 

So tomorrow i will get a closer look at the camshaft and remove the driveshaft from the housing. That should give me more of an idea why or how it’s happened. It seems hard to think it’s just sheared off for no reason it’s not under any load as such.

Yes I agree not the best looking condition I can only
go by what they have told me. Which they say it’s not OE but it’s a new reputable brand which they’ve had little or no problems in the past with.

Fingers crossed I’ve dodged a bullet here!


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It’s under a lot of load driving the pump but obviously it shouldn’t shear off.

 

How much torque was used in fitting.the pump. I can imagine this as being a case where the pump was pushed into the engine with the drive not engaged in the camshaft slot and then the shaft was pushed in to the gear in the pump by a brutal torqueing up of the fixing bolts.

- e.g. on a T1 the two different cam styles are fitted using the exactly same pump but for one the pump drive shaft is pressed 2 mm out of the pump gear. Pressure on the end of the drive shaft can then push it in 2mm so it would disengage if you lined it up wrongly with a dished cam.
It should take a fair amount of pressure but if somebody is modding a T1 pump by pushing the drive shaft out of the pump gear to get the tang to engage it may then be easier for it slide back .

That drive tang doesnt look sheared, it looks like it has hardly been touched.

 

I’m sure the shaft has pushed through the gear, Mark, it’s not a shear failure.

And the problem with that is not only does the tang disengage with the cam but the gear is loose on the shaft and it’s not keyed so even if it's pushed back into position the shaft will turn but the gear won’t = no oil pressure.

That is a VW pump but it can’t be new, they haven’t been manufactured for years. I’d really like to know what the ‘new reputable brand’ is.

 

Good question, So who is the garage/engine builder then, didn’t realise any garages frequented this site....

 

let's hope it's not from the Newcastle area and the OP has joined our club

 

Overheating hasn’t been mentioned.

I always wondered why ‘he’ changed my perfectly good t4 oil pump with a CB with a similar consequence to this problem.

 

I didn't know you had one of those. Or was it you years ago at TE with an engine that over heated at tickover?

 

Nope, never been to techenders. My engine seized a valve in one of the new heads he fitted, cost £900 to repair, total mileage on the engine at this point around 100. Since been to it's first trip on the Isle of Wight and back, now the cam is rattling and it has no power 50mph flat out. I'm currently waiting for @pkrboo to get back to me. Fed up with messing around with it and I'll never trust it.

 

Probably the same reason he didn't fit the thermostat and flaps that he bought off @zedders but I paid for. He probably used it on another engine.

 

You won’t regret that!

 

It's a damn shame.
One of this site's major problems is recommendations made by people who have never used the person they recommend.

 

Oh dear. But I have to say this nameless person is not a bad man in my experience. He was definitely doing "something" wrong but IMO not from lack of care, I wonder if he ever cracked it, whatever it was.

 

He shouldn't have kept building engines and charging customers for them, until he had worked out why the ones he had already built kept going wrong!

 

The thing is, as far as I know, nobody has ever found a definitive cause for these problems. I used to think it was compression but for the cams he used I'm not so sure. The only one I fitted and drove for a few miles belonged to top banana. It was quiet and powerful form idle, I was impressed. He towed a trailor at 100mph on the speedo! I don't recall him having any problems other than splitting his VS exhaust. This was an engine prior to the dud ones. Having known the chap for 25 years off and on the whole situation has always baffled me.

 

From what I remember TBR did have issues, just wasn’t so public about it - though not the same issues as the rest of us had - this issue TBR told me directly so not second hand...

I’ve lost count of the engines this nameless person built and all had the same problem.

Your right, nice chap but just couldn’t get something right with these engines.