Robert D

Okay,
A few weeks ago my timing belt broke. No warning of course (10k miles premature). After finding out that none of my valves were bent, James Bricken (who is doing all of the work) said he noticed a scratch on one of my lifters. Upon looking further he discovers that my cam gears were eaten away (I will post pictures soon). So, I am now looking at an even more expensive job (I am replacing the valves anyways). Great thing is, when I had a shop replace the chain tensioner they did not notice or tell me about my cam gears. Nor did they replace the chain, which must have shown them something (this was done some 25k miles ago). Any advice on new camshafts? Or can the gears be repaired in any way (I saw on the huntleyracing page they have cam gears for sale)? Any thoughts are greatly valued.
Robert D
'88 944S <img src="graemlins/cussing.gif" border="0" alt="[grrrrrrr]" />

Deepice

Something sounds fishy....I think you might be looking at this wrong...If you didn't bend any valves..I would think that the cam chain seized/split locked the cam and then snapped the belt....

I would think that the area around the cam chain tensioner has been weakened...I would have the head checked ....

the manual states if there has been damage due to belt failure the chain must be changed due to stretching...... did you ever loose a belt previous to this?

John Milledge makes some great cams...

jim968

Robert, just an off-the-wall thought... after you price the parts & labor for repair, you might also want to price the cost of swapping in a good used 944S2 or 968 engine.

You'd probably need the engine, DME, external oil cooler, & exhaust, but either one would be a major upgrade in power. Either would require a new timing belt & careful inspection of the cam chain & tensioner, but the cost might not be too much worse than fixing what yuo've got, if you found the right wreck to strip.

Jim, "Old age is a helluva price to pay for maturity."

Dave

[quote]Originally posted by jim968:
<strong>
Jim, "Old age is a helluva price to pay for maturity."</strong><hr></blockquote>

Thanks Jim, I needed a <img src="graemlins/roflmao.gif" border="0" alt="[hiha]" /> . The old age I have, maturity is still on backorder!

jim968

[quote]Originally posted by Dave:
<strong>

... maturity is still on backorder!</strong><hr></blockquote>

From what I've seen recently, it's in short supply everywhere, and what's available is often of poor quality...

Jim, "Experience is a wonderful thing. It lets you recognize a mistake when you make it again."

Crackhead944S

I thought that the gears are part of the cam. Meaning you need to replace the cams if you want to replace the sprockets. Also, I was going to replace just the chain for economic reasons, but was told by a relative, who has a lot of motorcycle experience, that you never want to change a chain without changing the sprockets. He claims that they wear together and they should always be changed together. How much are cams on an "S"?

Robert D

The belt did brake due to the cams seizing. The gears on the camshafts are chewed up (teeth missing etc.). Now, adding up costs for parts im looking at roughly $2400-2800. The head does not have any apparent damage. However, I will have it checked out before doing anything major to this motor. My pistons look only halfway worn, at 180k miles. I'd like to try to get another few years out of the motor, however, Huntley does sell an S motor for 3800 dollars (I don't know if that includes cams or not...I'd assume not).
Again, any thoughts will help.
-Robert D

Deepice

[quote]Originally posted by Robert DesRosier:
<strong> Huntley does sell an S motor for 3800 dollars (I don't know if that includes cams or not...I'd assume not).
.
-Robert D</strong><hr></blockquote>

The cost of the Huntley is with a core charge...

Honestly....I would talk to John at Anderson Motor works....

<a href="http://www.andersonmotorworks.com" target="_blank">http://www.andersonmotorworks.com</a>

He can tell you straight up what to do

Robert D

Another thought, my car had the tensioner replaced about 20k miles ago. When removed, my old tensioner had worn through the pads on both sides to the point where it was running grooves through the metal. The shop who did the replacement did not replace the chain, nor did they mention any odd wear on my cam gears... The point I am getting at is the car would run rough ever-so-often. Almost as if the timing were skipping throughout the powerband. I ran through many things trying to figure out what was causing this (wires, cap + rotor, fuel injectors, fuel filter, etc.) and could not figure it out. I took it back to this shop and told them the problem, all they did was adjust my CO mixture and send me on my way (the problem would come and go irregularly). So if anybody is noticing similar simptoms of the timing skipping, it may be of value to check your camshaft sprockets to avoid my situation.
-Robert D

Deepice

[quote]Originally posted by Robert DesRosier:
<strong> The shop who did the replacement did not replace the chain,
-Robert D</strong><hr></blockquote>

In my opinion THE SHOP IS AT FAULT FOR YOUR FALURE.

You had metal against metal wear...and they didn't replace the chain? I would go after the shop... They did a half assed job and you got bit in the *** by it.