Exhaust cam wheel

nibbes123 · Post by **nibbes123** » Mon Feb 20, 2012 10:45 pm

Can someone help me out , want to change the cam wheel with the air pump wheel on it on exhaust side to a single wheel from a 1977 spider 1.8 litre. My car is a 1974 spider 1.8 litre.
Thanks
Nick

124JOE · Post by **124JOE** » Mon Feb 20, 2012 10:53 pm

didnt that cam wheel drive the AC?

nibbes123 · Post by **nibbes123** » Mon Feb 20, 2012 11:06 pm

Hey Joe it did not drive the AC

Daniel · Post by **Daniel** » Mon Feb 20, 2012 11:22 pm

in 77 they drove a smog pump off the exhaust cam pulley

DocGraphics · Post by **DocGraphics** » Mon Feb 20, 2012 11:50 pm

The 1978 1.8l does not have the cam drive smog pump (runs off a v-belt off crank pulley) so a 78 exhaust cam pulley should work for you

nibbes123 · Post by **nibbes123** » Tue Feb 21, 2012 7:41 am

Thanks Don. One more thing to install the wheel , what should I do for the head is on the engine still. Don't want to take head off.

So Cal Mark · Post by **So Cal Mark** » Tue Feb 21, 2012 10:15 am

there is no need to remove the head just to replace a cam wheel

nibbes123 · Post by **nibbes123** » Tue Feb 21, 2012 2:10 pm

Thanks Mark

azruss · Post by **azruss** » Tue Feb 21, 2012 4:01 pm

just make sure you keep that cam still while you are replacing the pulley.

Turbofiat124 · Post by **Turbofiat124** » Tue Mar 20, 2012 6:09 pm

nibbes123 wrote:Can someone help me out , want to change the cam wheel with the air pump wheel on it on exhaust side to a single wheel from a 1977 spider 1.8 litre. My car is a 1974 spider 1.8 litre.
Thanks
Nick

I would be interested in trading your double pulley for a single pulley if your interested. I'll even pay you shipping to ship it back.

So Cal Mark · Post by **So Cal Mark** » Wed Mar 21, 2012 1:13 am

what a deal! If he doesn't want to swap I have a double pulley I'll gladly trade

nibbes123 · Post by **nibbes123** » Wed Mar 21, 2012 6:35 am

Hi Turbofiat124 thanks for the offer , but will be keeping the old cam wheel. Mark said he is willing to trade if I did not .
Thanks again
Nick

maytag · Post by **maytag** » Wed Mar 21, 2012 7:47 am

azruss wrote:just make sure you keep that cam still while you are replacing the pulley.

I'd love to hear how others have held the cam from turning while removing a cam-gear. I've had to be pretty creative.... and I'm not sure I like the solution I'm using.

Turbofiat124 · Post by **Turbofiat124** » Wed Mar 21, 2012 8:39 am

So Cal Mark wrote:what a deal! If he doesn't want to swap I have a double pulley I'll gladly trade

OK. I have plenty of cam pullies. I actually have an intake and exhaust cam pulley from a 1438. Someone told me these were better for some odd reason. Alters the cam timing slightly?

I also have a bunch of X 1/9 and Yugo cam pullies. Someone told me these were interchangable with twin cams. I don't know about the timing marks though. I'll have to check.

Turbofiat124 · Post by **Turbofiat124** » Wed Mar 21, 2012 8:50 am

maytag wrote:
azruss wrote:just make sure you keep that cam still while you are replacing the pulley.
I'd love to hear how others have held the cam from turning while removing a cam-gear. I've had to be pretty creative.... and I'm not sure I like the solution I'm using.

I once picked up a Spider with the cam pullies reversed. The PO said the engine had 60# of compression yet it still ran, just not very well. Turns out the cam pullies were reversed. The machine shop that did the cylinder head must have forgot the mark them and didn't know which pulley went to which cam and just guessed. He guessed wrong!

I wrapped a used timing belt around each pulley (one at a time) then wrapped the slack around the head of a screwdriver handle several times and had my father hold it while I loosened the cam pulley bolt. Then used the same method to tighten the bolts.

Afterwards the compression jumped from 60# to 120#!!

Exhaust cam wheel

Exhaust cam wheel

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