Is 200 an interference motor?

[Bort62]

Just general curiosity. didnt see anything in a search.

 

[addo]

No! You're good to go unless it has a radical cam and increased rocker ratio.

 

[CobraSix]

nope. Most older engines are non interference. Also, most pushrod engines are non-interfence until you get radical cams, rockers, large valves, etc.

Slade

 

[powerband]

In a "conventional" OHV cam chain driven pushrod engine with the oil pump and distributor running off the cam, if the cam chain 'breaks' you will have a lot more to worry about than "Valve interference". A more common occurence with many "conventional" engines was the failure of the fiber or plastic cam gear used to quiet their operation. As it wore out the valve timing could jump a tooth or two and drive you crazy with rough running, backfiring and loss of power mimic'ing ignition or carb problems. When it would slip further it still would not interfere so it could crank with the chain slipping - occasionally firing.

Powerband

 

[Bort62]

Yeah, I am pretty familiar with the interference/non interference shuffle.

I just wanted to make sure. I am putting my motor back together after it sitting around for a long time - and some of the valves seem to have bound up.

So when I cranked it, a few of them stayed down and I broke a few pushrods.

I just wanted to make sure I didnt kiss o' death any of the valves before I carry on.

Got them freed up now, so there is a remote chance I might get it started today. We will see how far I get on the DSII stuff and if work lets me go AWOL for a while.

 

[pedal2themetal45]

So when I cranked it, a few of them stayed down and I broke a few pushrods.

Don't know if I'd take a chance on the valves are you sure they move easyly enough??? and didn't get bent????
You might want to lossen the valve train and shoot some air in there and see if there is no leak down.. listen for air at the carb and the exhagust.

good luck
tim

 

[Bort62]

Yeah it seems to be allright. I worked them loose with a little WD40 and they all pop closed like they are supposed to now. Engine turns over freely.

We will see, The leakdown test is a good idea but I don't have tha sparkplug adapter so its not super convinient.

 

[Bort62]

Alright, So I did the leakdown anyway and discovered that they are pretty much all leaking.

So now the head is back off and all the valves are out. they are pretty gritty looking but none are bent.

Im going to try to grind them and see if that helps.

Any reason I can't re-use the same head gasket? Never ran, was just torqued.

 

[addo]

I wouldn't recommend it, but if you're short on folding then try! Retorque 2-4 hours after cooldown and allow adequate relax time (few hours) between second and final torques when installing.

 

[Bort62]

Eh, I've got an extra here so Ill just use that.

Oh the Joys.