Overheating, Engine / Cooling |
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Overheating, Engine / Cooling |
ash00 |
May 2 2016, 12:15 PM
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#1
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Newbie Group: Members Posts: 22 Joined: 29-March 16 From: Dixon, CA Member No.: 19,810 Region Association: Northern California |
Hi All,
After a month and a half of business trips, I finally got to drive my the 1970 914 that I'm still learning about. One thing is clear, that the restoration was half-assed, and rather than blaming the PO, I have to figure things out the hard way. Hopefully before the fact. I'm trying to not let this leave a bad taste in my mouth of the 914 experience. The recent issue is overheating. This is my first car in the aircooled world, and the car was equipped with a rebuilt 2.0L with the weber downdraft setup in place of the FI. It runs well when warmed up, but during driving, I can't drive it for more than 10 minutes without the gauge being pegged to the red. I'm hearing things of "false air" and such. Pardon my ignorance, but I need a place to start looking for info. Is there any documentation or info out there on how the air cooling is managed, and what hardware is there for me to test / check? Any tips are appreciated. Thanks, Ash |
era vulgaris |
May 2 2016, 03:33 PM
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#2
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J is for Genius Group: Members Posts: 982 Joined: 10-November 13 From: Raleigh, NC Member No.: 16,629 Region Association: South East States |
Since this is your first air cooled car, let me ask what RPM do you typically cruise at?
If the answer isn't between 3k and 4k rpm, then you're doing it wrong. The cooling fan is bolted to the crankshaft, so in order to get enough cooling air moving, you need to cruise at higher rpm than a water-cooled car. Also, there's a valve (can't remember what it's called - oil pressure relief/oil pressure release...something like that) that allows oil to bypass the oil cooler when cold to aid in warm up. Over time it can get worn out and not allow enough flow to the oil cooler when the engine is warm. Also, just FYI, the temp gauge only measures oil temp. Not sure what you mean by "false air". |
ash00 |
May 3 2016, 11:34 AM
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#3
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Newbie Group: Members Posts: 22 Joined: 29-March 16 From: Dixon, CA Member No.: 19,810 Region Association: Northern California |
I appreciate all the help guys! Looks like I'll have to do some digging. I have to find what the flaps look like and see if I do have them.
I'll have to run the temp test on the oil. If that is the oil temp I'm reading, then I have to see what is restricting or causing it to get hot quicker than normal. Any links or pictures as to what the cooling flaps are supposed to look like so I can compare? |
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