Will bent valves appear fine without rocker arms or cams in?

[BurrowZ]

Just as the title says.

Long story short I finally got my car running, and the timing belt tensioner pulley failed somehow and my belt came loose.. I noticed this but the car was still running and not dying when I pulled it into my garage. I redid the timing and it was hard to turn over by hand when setting the tension. I assumed bent valves.

Took the head off, there are clearly small marks in the carbon buildup on the pistons from where the exhaust valves were contacting them. Then I checked the valves, I set the cams in TDC position and some of the exhaust valves and a couple intake valves were slightly open.

So I removed the cams and rocker arms, took one more look to see which valves I needed to change again and they are all seating properly? Does this mean my problem lies elsewhere? Or should I continue to change the valves?

 

[bryanwheat]

If they are just slightly bent than they will still seal in the seat alright. But it will wear the hell out of the guides and stems. To properly check them you need to pull them out and roll them on the edge of a table.

 

[SiX22oH6]

you wont know for sure with out taking them out..

should upgrade them while your in there

 

[Ferrarieater]

If your broke and just want to know it is sealed, then turn your head upside down and fill the valve area with kerosene and leave it overnight to see if it leaks through.

 

[SBstar]

If you're broke it still doesn't cost anything to pull them out. Unless you're paying someone to do it for you I suppose.

For reference I had a valve that would not seal turning the cams over. Pulled the cam off and turned the head back over and the valve was sealed up tight to the head. Confused I almost thought that I had been mistaken but decided to pull it anyways. It was definately bent and worse it cracked the valve guide. So yes, they may seal up tight once the cams are pulled, however, it does not change the fact that it is bent.

 

[BogusSVO]

A bent valve will not seat nor seal.
It may be a slight bend, but it still needs to be taken care of.

Once the head is off the engine, pull the cams from the head.

Set the one side of the head up, intake or exhaust

Pour a fluid in the runners/ports

Count 5 if no leak or just a drop or two the valve is fine.
now empty those runners, and repete on the other side.

If you see a little stream come the valve/seat then that valve has issues.

 

[rw87tt]

Before you pull the valves. Take the cams off. Take it to a machine shop and see how much they'll charge to leak check it.

 

[Black-Out]

Slightly bent valves can also make a ticking noise while the engine is running from slapping the valve seat unevenly......A stethiscope may help with the diagnostic before you dis-assemble the head and do a "table test"
William-

 

[bryanwheat]

you wont know for sure with out taking them out..

should upgrade them while your in there

There is no need to upgrade the stock valves unless you are making big power and need something larger diameter. This would not help in any way.

 

[Black-Out]

There is no need to upgrade the stock valves unless you are making big power and need something larger diameter. This would not help in any way.

Columbia, Mo! I grew up there, do you know Stu Denson? he had a sick ass 2G (white carbon hood, black wheels fully built Rolls an RX7 now) I also ran around with Malcom Albritton (Galant VR-4) back in the day before he sold it.......
Sorry to thread jack guys......
Pm me if you know who Im talking about!

William-