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HMeeder's Avatar
 
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Porsche Crest Is it a bus motor?

Here's where the 914 community shows what it is really made of.

Last Monday I posted that my 1.7 had lunched a valve and that I would out of commission for a bit. Friday evening I'm at work at the restaurant and James (RedBeard) and Mike (Mike95125) stroll into the bar and tell me "We've got something in the truck for you." Sho'nuff, what appears to be a 1.7 that came out of a car James says was running when he parked it 6 months ago, sitting in the back of his Jeep.

If I wasn't a manly man, I might have gotten a bit misty for a moment there. Thanks guys. That was above and beyond!

Now here's the thing. I got a chance to look at it in the light and something is a touch odd. James tells me that the motor is definitely the wrong one for the car it came out of. It had carbs and the wrong distributor and the sheet metal didn't fit quite right (his car had been a track car and we figure someone pulled the original motor. I think he may have had the engine tin for a 2 liter and that's why it wouldn't fit.)

It definitely is the right case for a 1.7 but is missing the case number on the little flat spot at the rear right. The flat spot is there and it hasn't been ground off or messed with, it's just blank.

The heads look like 1.7 heads (4 intake manifold studs) but they are vented a'la a 2.0.

Here's the real kicker, the oil dipstick is in the right place, but there's another dipstick hole at the front of the motor right next to the alternator.

What else can I look for to identify this engine? It looks like 1.7 engine tin will fit correctly (tall at the front for the bigger cooling flaps) and the fan shrould is the correct one. Is this a bus motor? or, heaven forbid, a 411/412 motor? I don't want to put my FI and time into installing this engine only to find that it will run like crap (wrong cam, wrong valves, wrong displacement) and I won't be able to run it at PCA events (I know, this motor is a temporary fix to get me down the road until I can rebuild my other motor, but still. I don't want to have it cause me undue grief.)

Thanks for any clues!
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Last edited by HMeeder; 12-01-2002 at 06:14 AM..
Old 12-01-2002, 06:09 AM
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How 'bout a universal replacement case? I think replacement cases were not numbered. My "Tom Wilson" book is at the office.

Did you check for #s where the 2.0 numbers are located? I think VW stamped them there.

Pop the valve covers and see what OEM is cast into the heads.

If it were "P" 2.0 tin, you wouldn't be able to get to the spark plugs if it was mounted on a 1.7.

Rocker box vents could be an indication of a later model 1.7.

From my feeble memory, VW and Porsche 1.7 differed only in the dipstick location and oil filler (and some ancillary sheet metal).

If James / Mike want to drive to Riverside in a week (I'm off to Scenic Phoenix for busyness) I have several 1.7s, one of which could be donated to your cause.

Just thoughts!
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Last edited by Ron Meier; 12-01-2002 at 06:38 AM..
Old 12-01-2002, 06:35 AM
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Additional clues:

2 PO's ago, the car was owned by a "Porsche Mechanic", or so the PO told me. The car had the chassis stiffening kit installed and the trailing arms boxed, fiberglass flares and wide race wheels, so I believe it was run on the track.

I think the engine was "stuck in" when it was sold and indeed, it had 2 liter sheetmetal on what I believe was a 1.7 engine.

Here's the ad:

"I bought this car about 2 years ago from an individual who said he was a "porsche specialist" for $2,500. I didn't know anything about this car and after I had it shipped,I discovered that it had significant rust areas under the car. I am not sure if the car has enough rust that there may be structural problems.- although it does not sag and the doors seem to close properly. I've tried to learn how to weld, but have given up on this project. I've only taken this car out on the road once since I bought this car-on the day it arrived, so I'm not sure how it handles. The car has flared fenders, 1.7L Carb engine, and a fairly clean interior. The engine seems to run fine. On the exterior, the left rear fender needs to be painted,and there are some rust spots. I've also changed all shocks, and wheel bearings. One steel brake line needs to be replaced as I broke it by mistake. I think this car can be restored by someone mechanically more competent than I or may be used as parts car."
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Old 12-01-2002, 10:29 AM
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Didn't buses have a cage over the fan and the ohl (been watchin speed channel) fill at the extreme lower right (other side than the dizzy) of the case? 914 engines have the cast boss there, but it hasn't been opened.
Also, is there a difference between 1.7 bus/411 heads and 914 same? I thought the diffrence was only in the 2.0. I could be wrong. Who knows what you've got there anyway Herb, the specialist probably mixed and matched all kinds of stuff. Swap the top end and the tin?
Nice random act of kindness guys!
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Old 12-01-2002, 01:04 PM
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Oh yeah, even with the "holes" it passes the DD Big butt test.

James
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Old 12-01-2002, 04:09 PM
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Not all VW-badged 1.7s were the same.

http://www.tunacan.net/t4/reference/case.htm

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Old 12-02-2002, 08:18 AM
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True, but even those references have some errors....

James
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Old 12-02-2002, 09:49 AM
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True, but perfection is not required in this instance.

The Buses and the 411/412 wagons had the oil filler and dipstick going into the engine through the lower-right-rear corner (Bus orientation of the motor). The 411/412 "sedans" had the oil filler and dipstick in the 914 location. (I may have the wagon/sedan thing backwards, but one was in one spot and the other was in the other.)

Check for an engine number up between the oil filler and the fan shroud.

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Old 12-02-2002, 12:56 PM
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