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Old 10-09-2018, 02:04 PM   #26
dl242gt
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To measure the clearance on each cylinder you will have to rotate the engine to each position that has the cam lobes like number one is when it is firing. Both valves closed. Start at number one like you are doing. Then follow the firing order which is 1,3,4,2. So you would rotate the engine till you see cylinder three lobes up and check clearances. Move to number four and lastly to number 2.

What kind of gear is it? I use Dales timing gear and it is the drilled type with multiple holes to select the cam timing position you want. You select the hole you want with the timing you want and install that on the cam dowel pin lined up with number one firing and using the mark on the timing belt cover.
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Old 10-09-2018, 03:37 PM   #27
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Understood. I didn't realize I had to check it in the firing order. That is certainly helpful to know.
It's Dales timing gear - drilled type, which I believe it what you are also using.

I have reading threads where the suggestion is to use +4 deg with the M46/47. Is this also the case with the AW70 or should I attempt with +6 degrees?

Another question: when I am rotating the cam to measure the clearances across the cylinders, this will be independent of the intermediate shaft and the crankshaft. Does this mean that I can go the whole cycle of rotation on the camshaft without any issues?

Last edited by 240-FAN; 10-09-2018 at 03:43 PM..
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Old 10-09-2018, 03:58 PM   #28
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Yes you can spin the cam around and around without issue. It is non interference. Just time it properly when you put it back together.
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Old 10-09-2018, 06:21 PM   #29
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Just rotate the cam and the crank to TDC prior to installing the belt. Be aware that it will shift a little once the tensioner takes up the slack. Rotate the motor by hand a couple of revolutions and recheck the alignment.

Be absolutely sure to align the distributor drive gear. I use a small screwdriver and lay it in the drive gear to make a pointer to be sure the gear isn't a tooth off. I often find this is the most difficult part of the process.

Start with +4. You will likely ping with more. If the motor pings on +4 on regular, try premium fuel. If it doesn't ping on regular at +4, you can try to advance it more. I dialed mine in that way. Dale's gear isn't a fixed gear, so you can loosen the fasteners and rotate the cam carefully (with the motor off) to advance/retard the cam.

Have fun!
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Old 10-09-2018, 09:17 PM   #30
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Thank you everyone who's replied so far. I feel a lot more confident now.

Here's an image of the Dales gear I'll be installing.
[IMG][/IMG]
I'm assuming the 0 degree is the one at 7 o'clock and each of those little dimples are in 2 degree increments?
If so, I just need to line up the dimple associated with the +4 degrees to the TDC mark for the camshaft?
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Old 10-09-2018, 09:26 PM   #31
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You've got the idea.

Here's the instructions for Dale's gear.

https://drive.google.com/file/d/0Bwt...xwNGo3WFE/view

https://drive.google.com/file/d/0Bwt...lUSl9MbDQ/view
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Old 10-09-2018, 10:54 PM   #32
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Just what I was looking - thanks!
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Old 10-09-2018, 11:58 PM   #33
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Just don't turn the cam by the bolt on the gear. Turn it by the outer part of the sprocket.
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Old 10-10-2018, 01:28 PM   #34
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Just don't turn the cam by the bolt on the gear. Turn it by the outer part of the sprocket.
Useful tip. Will keep that in mind.
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Old 10-11-2018, 11:50 PM   #35
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Ummm ... round tooth != square tooth
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Old 10-12-2018, 09:23 AM   #36
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Quote:
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Ummm ... round tooth != square tooth
I assume OP has a 240 and unless itís a 93, he has the right gear. Even if it is a 93, he can swap crank gear and aux gear for square tooth and be good to go.
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Old 10-12-2018, 10:22 AM   #37
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Yeah, I got a '91 240. Will that gear not work?
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Old 10-12-2018, 11:30 AM   #38
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Yeah, I got a '91 240. Will that gear not work?
It will work fine. Square tooth belts were used until 92. 93+ are round tooth AFAIK.
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Old 10-12-2018, 09:43 PM   #39
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Quote:
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I assume OP has a 240 and unless itís a 93, he has the right gear. Even if it is a 93, he can swap crank gear and aux gear for square tooth and be good to go.
Cool, but crank pic sure looks like a round tooth.
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Old 10-13-2018, 01:15 AM   #40
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Cool, but crank pic sure looks like a round tooth.
Yeah it was just a generic picture I found on the internet. The same principle applies either way though.
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Old 10-13-2018, 06:13 PM   #41
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Yeah it was just a generic picture I found on the internet. The same principle applies either way though.
Oh lol i thought it was his pic.
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Old 10-13-2018, 07:50 PM   #42
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Square toothed belt on my car for sure.
I replaced the seals yesterday and swapped the camshaft out. Measured the clearances as well.

Bucket#1 -> 0.020"
Bucket#2 -> 0.015"
Bucket #3 -> 0.017"
Bucket #4 -> 0.016"
Bucket #5 -> 0.015"
Bucket #6 -> 0.015"
Bucket #7 -> 0.018"
Bucket #8 -> 0.017"

Which basically tells me, that I need to add a shim that is 0.005" thicker than the existing one for bucket #1 and so on - is that correct?
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Old 10-13-2018, 07:56 PM   #43
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To be honest you could safely run it as is, but most will reccommend that you don’t.

Yes, you need a shin that is .005” thicker than that’s in there and that will bring it within spec
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Old 10-13-2018, 08:00 PM   #44
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Rent the shim kit. It's worth it. Then you have all the sizes you need and once it's returned you only pay for the ones you used. PM hiperfauto and ask if he has a kit for rent.
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Old 10-13-2018, 08:08 PM   #45
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He already has it.
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Old 10-13-2018, 08:10 PM   #46
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Already got the kit from him!
I just wanted to make sure that my math skills aren’t at a point where they need to be completely written off

@PromiseRing - I figured since I have my car pretty much torn apart, I might as well Re-shim them back to spec.

Interestingly, the original hushers were still in there. However, they were pretty much done having lost all elasticity and were completely brittle.
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Old 10-13-2018, 08:17 PM   #47
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To me your numbers look perfect aside from cylinder 1. Should be a nice upgrade for ya, and get ready for a super lumpy idle below 40F or so, but only for 30 seconds or so. Actually sounds cool
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Old 10-13-2018, 09:48 PM   #48
dl242gt
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Glad you got them. The B cam is a nice upgrade. It won't be as smooth but it's not lumpy gravy either. Still a stock cam for easy to pass emissions testing if you have that where you live.
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Old 10-14-2018, 11:04 AM   #49
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Awesome! I’m thrilled to get it back together. This project has been a great learning experience for me. The 240 gets stored just prior to Thanksgiving. So cold weather driving is never really an issue.

She’s no show car, but is my first car from college. Has so many special memories
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Old 10-14-2018, 11:36 AM   #50
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Quote:
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Sheís no show car, but is my first car from college. Has so many special memories
Maybe clean it
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