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Replace cam gear easily?


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#1 boostinmini

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Posted 13 January 2018 - 02:08 PM

Hey guys

Wanting to install a adjustable cam gear in my daily driver..

Is it possible to change the cam gear in a assembled engine?





#2 fuel

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Posted 13 January 2018 - 03:11 PM

Yes it is but it is a very fiddley process.

Take rocker cover off, turn engine to TDC, remove/loosen cam gear sprocket bolt and make some clear markings on the stock cam gear and chain, preferably close to the locating dowel. Transfer the marking location on the stock cam gear to the adjustable cam gear. You can now remove the chain from the cam gear (carefully, while keeping chain tension on the lower sprockets), and now swap in the adjustable gear making sure the markings line up and then bolt the gear back on.

#3 boostinmini

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Posted 13 January 2018 - 04:10 PM

There is enough slack to get the gear out?

Do I have to take out the holder for the cam gear for extra room?

Do I need to some how push the chain tensioner in ?

#4 techboy

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Posted 13 January 2018 - 04:24 PM

To get the slack you'd have to take the holder out.
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#5 boostinmini

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Posted 13 January 2018 - 04:26 PM

That seams tricky to get out

#6 techboy

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Posted 13 January 2018 - 04:57 PM

The holder? Its only held on by one bolt. Are you trying to do it without lifting the head off, or just not untiming the car?
1988 Starion ESi-R ... crushed by a tree 10/31/11 - back from the dead 8/2016
1988 Conquest TSi ... current driver - sold to Bigjoe 6/2016
1987 Conquest Flatty ... F/S thread - sold 8/2014
1987 Conquest TSi ... parts car - sold to Coldscrip 12/2011
1999 Eclipse 4G63 ... heavily modified.
Feeback Thread | Motor rebuild thread | Restoration thread

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#7 boostinmini

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Posted 13 January 2018 - 05:00 PM

With out lifting the head...is my daily so wanted to do it in a evening if possible

#8 tsi_tom

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Posted 13 January 2018 - 05:02 PM

Be careful not to drop the bolt taking the cam holder out
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#9 boostinmini

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Posted 13 January 2018 - 05:33 PM

It is possible with the head on?

#10 techboy

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Posted 13 January 2018 - 05:46 PM

Thats a good question. I know it can be done lifting the head off without untiming it b/c Ive done it.
1988 Starion ESi-R ... crushed by a tree 10/31/11 - back from the dead 8/2016
1988 Conquest TSi ... current driver - sold to Bigjoe 6/2016
1987 Conquest Flatty ... F/S thread - sold 8/2014
1987 Conquest TSi ... parts car - sold to Coldscrip 12/2011
1999 Eclipse 4G63 ... heavily modified.
Feeback Thread | Motor rebuild thread | Restoration thread

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#11 boostinmini

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Posted 13 January 2018 - 06:30 PM

Hmmm I would like a firm answer before I attempt this

#12 fuel

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Posted 13 January 2018 - 08:02 PM

the holder is one 10mm bolt - you can get to it with a small 1/4" ratchet with a 1" or so tube socket

#13 fuel

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Posted 13 January 2018 - 08:03 PM

you can also take off the tensioner inspection plate and manually lock the tensioner in place.

#14 boostinmini

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Posted 13 January 2018 - 08:07 PM

Tensioner inspection plate?   Thought that was for the balance shaft chain

#15 Amonje123

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Posted 15 January 2018 - 10:01 AM

OK I just did this too week ago on my mpi build. Hell no the is not enough slack to put the sprocket on or even off for that matter.

The Lil holder does have to come out. And not really enough room to get a tool down there to loosen that 12mm bolt. So after like 10min of wt.... am I going to do.

Me and my buddy wwere like, why don't we just bend the holder down. Then we can bent it back up.

So that's I did. Took a pry bar and hammer. Place pry bar on holder and wacky it a few times. Not that hard it is thin metal and bends kinda easy.

Cam gear was able to drop down farther and get the chain off. Then when your done just pry the holder back up.

And no I didn't remove the rocker assembly. But yes mark the chain forsure. So you don't get the timing off.

Easy as that.

#16 Amonje123

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Posted 15 January 2018 - 10:04 AM

Ooo and a lot easier with 2 ppl. The plunger on the oil pump will come out and take the slack from the chain. So the plunger will have to be pressed in. When removing and installing the gear.

#17 boostinmini

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Posted 15 January 2018 - 10:19 AM

That's awesome news how did you end up pushing the plunger in?

#18 Amonje123

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Posted 25 January 2018 - 01:33 AM

Ooo that's when the second hand comes in. One of you guys use a long pry bar and push the plunger down other one takes the gear off. Piece of cake.

#19 croquest87

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Posted 26 January 2018 - 06:04 PM

Sounds like a big pain in the a.. knowing myself l would be pulling the cover and whatever else to do it but hey if it works it works right?

#20 Amonje123

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Posted 27 January 2018 - 03:53 PM

Depends on your tech level. I can swap a cam gear out in under 30min. We don't mess around here, we street race 2 3 times a week. Need the cars to be up and running on the quickness . I've swapped out pistons in a day to race the car the same night lol




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