Posted: Tue 6:01 pm Post subject: Re: Obscure causes of vapor lock + how to keep engine cooler Intact thermostatic assembly with new thermostatĪll tinware in place (As far as I can tell) I know installing an electric fuel pump by the fuel tank and removing the mechanical fuel pump would fix the vapor lock, but I'm afraid that the vapor locking is a symptom of my engine running hot, and if I have an electric pump, then I'll just drive until I overheat/blow the motor, because right now the vapor locking is acting like a fuse, protecting the engine from overheating.Īnother thing I might try is lining the metal fuel line in the engine with DEI heat sheath or something similar to try and reduce the radiative heat vaporizing my fuel - but I'm worried that might not be enough or it could have the same effect as described above.Īny ideas of how to combat this vapor lock or help my engine run any cooler? After about 10 minutes, I started the car again and drove about 40 more minutes home with no issues.Ĭould my metal fuel line be routed wrong in the engine bay? It comes through a hole in the vertical front tinwork, passes about 1/2in over the cylinder 3 tin ware, through a clip on the fan shroud, then curves around, goes over the intake manifold (again about 1/2in clearance), and into the fuel pump.ĭoes vapor lock always equal engine overheating? It restarted and I drove into a parking lot, where I swhut it off and observed a whole lot of bubbles coming up into my fuel filter (located between the fuel pump and the carb). I say vapor lock because the car lost pickup after shifitng into third, started to lose power, and then stalled out. It was about 75 degrees out and sunny, so not very hot. However, my car still vaporlocked today after driving about an hour and a half at ~45mph, stopping for ~5min, and driving another 20min. installed a new brosol fuel pump, along with a new drive rod and bakelite spacer/insulator (I made sure it dropped in freely and wiggled a bit as I know they can swell and bind the fuel pump drive rod) installed a new, working thermostat to replace the non-functioning one installed new engine-to-body seals, both front and rear Given the bug a full tune-up: adjusted valves, changed oil, set points and timing, and tuned carburetor I've changed/checked pretty much all of the common causes I've seen discussed on the web. I have been struggling with an intermittent vapor lock issue, as well as difficult hot starts on my 1966 Beetle. Posted: Tue 5:25 pm Post subject: Obscure causes of vapor lock + how to keep engine cooler Quick sort: Show newest posts on top | Show oldest posts on top Obscure causes of vapor lock + how to keep engine cooler
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