Show full size 924Board.org
Discussion Forum of 924.org
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 Technical FAQ924 FAQ (Technical)   Technical924 Technical Section   Jump to 924.org924.org   Jump to PCA 924 Registry924 Registry

Possible to bend valve by hand?...

 
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech.
View previous topic :: View next topic  
Author Message
McMichem  



Joined: 26 Jun 2015
Posts: 38
Location: Buffalo NY

PostPosted: Thu Mar 03, 2016 7:09 am    Post subject: Possible to bend valve by hand?... Reply with quote

I was doing my water pump,timing belt and vacuum lines on my 931.

I was trying to set timing based on my flywheel marks and not the little chisel mark on the oil pump pulley because I thought it would be more accurate. Apparently the flywheel was not put back in the same orientation because the marks were off, I ended up trying to crank the cam pulley with the oil pulley set at the "correct" mark and apparently cranked pretty hard pushing the valves into the Pistons because the marks were off and thought I was fighting compression.

Few questions for you guys as I finally have some money to get this car going.

1. Is it possible to bend a valve by force like I unfortunately did? No breaker bar was used, just the ratchet and socket.

2. If I did bend a valve and need to have that fixed. I plan on going through ideolas site for the valves, should I have the rings done while I have the head off?

-what type of price should I expect for labor for valves and rings?

-anything else I should check or have done with the head off besides rings and valves?

- I haven't done a compression test on my engine, but should I be able to spin the crank by hand with the plugs in (not easily)or would that suggest low compression?

I have $2000 total into my car right now with new timing belt, water pump, vacuum hoses and elbows done. So I'm gonna set a budget of $1500-$2000 for my car to get it back into decent condition.
_________________
1980 931 ~ 67,000 miles
Back to top
View user's profile Send private message
Grenadiers  



Joined: 20 Feb 2007
Posts: 3222
Location: Nelson, WI & Prescott, AZ

PostPosted: Thu Mar 03, 2016 7:30 am    Post subject: Reply with quote

Pull the plugs, and run a compression test, you'll find out very quickly!
_________________
'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke
Back to top
View user's profile Send private message
jason c  



Joined: 13 Jan 2014
Posts: 1018
Location: Nwi

PostPosted: Thu Mar 03, 2016 11:06 am    Post subject: Reply with quote

Grenadiers wrote:
Pull the plugs, and run a compression test, you'll find out very quickly!


^^^^yep^^^^

It doesn't take much to damage a valve. If you used enough pressure to turn the engine over with compression, you used enough pressure to damage a valve.

What rings are you talking about, wire rings, as in "O-ringing" the head?
Whether you should do that depends . The boost you plan to run and the head gasket you plan to use.

Cost can vary widely, labor on having a valve job done on the head will probably be around $150. It depends on where you take it. I've had it done for as little as $40 when I did the tear down,cleaning & assembly myself.

Certainly have the head checked for straightness while its apart.
Back to top
View user's profile Send private message
Rasta Monsta  



Joined: 12 Jul 2006
Posts: 11723
Location: PacNW

PostPosted: Thu Mar 03, 2016 11:44 am    Post subject: Reply with quote

Normal sized guy, normal sized ratchet, medium effort? I doubt you damaged anything.
_________________
Toofah King Bad
  • WeiBe (1987 924S 2.5t) - 931 S3
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    924Board.org Forum Index -> 931 Tech. All times are GMT + 10 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group