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What motor do I have?

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What motor do I have? #1
Nexus131 Nexus L CO, USA Sign in to contact 1965 Austin-Healey Sprite	Topic Creator (OP) Feb 4, 2012 11:44 AM Joined 12 years ago 88 Posts

I have a 65 body Sprite that I bought used a few months ago, that I am restoring. The VIN on the inside of the engine bay shows 62 vin. I have heard its pretty common on those old cars to have incorrect vins from body replacement and such.
My question is I just want some further clarification on which model engine I actually have in it. It does show 1100 on the block.

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Re: What motor do I have? #4
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Feb 4, 2012 12:29 PM Top Contributor Joined 12 years ago 14,671 Posts

Hmmm.... The 10CC engine has the oil separator can mounted to the front tappet cover like you have in your photo. The 10CG engine doesn't have the oil serarator can. But it should be connected to a port on the SU intake manifold, which you don't have as your engine has been converted to a downdraft Weber carb. Your's is connected to to rocker cover. But a 10CC rocker cover shouldn't have a breather pipe. Confusing. My guess is it's a 10CC 1098.

Rick

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Re: What motor do I have? #5
scoutll Bryan Durham ND, USA Sign in to contact 1965 Chrysler 300 "Annie"	Feb 4, 2012 12:33 PM Joined 15 years ago 2,751 Posts

The easiest way to tell to start with is look under the intake manifold on the side of the block. If there are two removable side plates bolted to the engine, it is a 1098 or 948. It they are not there, 1275. It looks like it has a side plate breather on it from a 10cc engine, so I would guess it has the plates. My guess is a 10cc from 64-66. Additinally, the exhaust manifold and down pipe look like the larger 10cc type (10CG had smaller manifold and pipe). Also, a side note.... That hose that goes from the valve cover to the side plate breather should not be hooked up that way!!! Pressure will build up in the engine and cause oil to leak from the rear scroll seal, and possibly the dipstick tube and pan gasket. They need to vent the pressure from the engine. On my car, I vent the valve cover to the air cleaner housing and the other to the atmosphere.

948 engines will have "950" cast into the block near the fuel pump opening under the carbs.

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Re: What motor do I have? #6
Nexus131 Nexus L CO, USA Sign in to contact 1965 Austin-Healey Sprite	Topic Creator (OP) Feb 4, 2012 01:24 PM Joined 12 years ago 88 Posts

Thanks for the tip. I didnt put that hose like that, it was already like that, ill make sure to change that.
So then it looks like a 10CC 1098?

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Re: What motor do I have? #7
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Feb 4, 2012 01:37 PM Top Contributor Joined 12 years ago 14,671 Posts

10CC 1098 would be my guess. But the only way to tell for sure is pull the oil pan and measure the main bearings. angry smiley

Rick

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Re: What motor do I have? #8
JJFarkas Jason Farkas New Boston, MI, USA Sign in to contact 1974 MG Midget "Ruby"	Feb 4, 2012 05:58 PM Joined 13 years ago 1,580 Posts

In reply to # 1975840 by refisk Hmmm.... The 10CC engine has the oil separator can mounted to the front tappet cover like you have in your photo. The 10CG engine doesn't have the oil serarator can. But it should be connected to a port on the SU intake manifold, which you don't have as your engine has been converted to a downdraft Weber carb. Your's is connected to to rocker cover. But a 10CC rocker cover shouldn't have a breather pipe. Confusing. My guess is it's a 10CC 1098.

Rick

For those w/o the oil seperator shouldn't the timing cover be attached to the carbs via that "Y" connector?

Jason

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Re: What motor do I have? #9
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Feb 4, 2012 07:37 PM Top Contributor Joined 12 years ago 14,671 Posts

Jason,

The timing cover with attached oil separator didn't come along until the 1275 engine.

The 948's and 10CG 1098's didn't have a closed crankcase. There was a hose fitting on the rocker arm cover connected to the air cleaner with a rubber hose. But the crankcase itself was vented to the atmosphere through a pipe mounted on the front tappet cover going down to the bottom of the oil pan. The end of the pipe was cut at an angle so that air moving past it while driving down the road would creat a venturi effect and draw air out of the crankcase. Excess crankcase pressure was simple dumped outside the engine.

Until the smog laws started going into effect in the 60's very few cars had a closed crankcase.

Rick

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Re: What motor do I have? #2
refisk Rick Fisk Frankenmuth, MI, USA Sign in to contact	Feb 4, 2012 12:06 PM Top Contributor Joined 12 years ago 14,671 Posts

Re: What motor do I have? #3
Nexus131 Nexus L CO, USA Sign in to contact 1965 Austin-Healey Sprite	Topic Creator (OP) Feb 4, 2012 12:13 PM Joined 12 years ago 88 Posts

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