Robin EH29C oil pressure

[Godeau]

I rebuilt an engine in a 1997 EZGO with a Robin EH29C engine. I had a broken connecting rod and my assessment was lack of oil. I replaced the crankshaft, rod, piston and everything else that was damaged.. When bench testing it, I didn't have any oil pressure.. I talked to several techs and was told they didn't carry much pressure, so I put it in the cart and test drove it. At about 10 miles it broke another rod and scored the crank. I replaced the damaged parts and still have no oil pressure on the bench. The only thing that I find not right from the manual is that I have too much endplay on the balance shaft. There was not a thrust washer in there originally and there is no seal on the shaft. I don't see how that would affect the oil pressure. It isn't pumping any oil at all.. I'm using 10W30 oil and it has a new screen in it. It's not a difficult motor to understand I'm baffled.

[golfcartg]

Make sure your oil pump cover is perfectly flat to avoid any bypass and pressure loss. Clean those oil passages thoroughly to guarantee unobstructed oil flow. And, always use OEM parts for replacements to keep your engine oil pressure running smoothly and reliably.

When you're working on the engine, every little detail matters. Often overlooked is the oil pump cover. This cover must be flawlessly flat to function correctly. Even the tiniest imperfection such as a bulge can wreak havoc on your system. Imagine that small deviation causing a bypass around the pump diminishing both suction and discharge pressure. The result? Insufficient lubrication, leading to catastrophic engine failures like broken connecting rods and a scored crankshaft which is exactly what you’ve been facing.

Grab a straight edge and a feeler gauge to check the flatness of the oil pump cover. If you find any bulging, either replace or machine the cover to ensure it's perfectly flat. Next, let's take a look at those oil passages. They need to be as clean as a whistle. Any residual debris or blockages can impede oil flow, leading to a drop in pressure. Use carb cleaner to meticulously clean the passages. With the valve cover off, use a shop vac on the passage on the fan side of the head and turn the motor over. Within about five seconds, you should see oil flowing. This method confirms that your oil can move freely through the engine providing the necessary lubrication to all components.

Always go for OEM (Original Equipment Manufacturer) parts from the dealer. Yes, aftermarket parts might save you a few bucks upfront, but they often don’t match the quality and durability of OEM parts. Investing in OEM parts means each component fits perfectly and functions as intended reducing the chances of future failures. If you have any questions feel free to ask!