how many valve springs per Valve ? 273 hp

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stroker402

stroker402

1968 dart GTS convertible
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on a 65 oem 273 commando engine ... how many valve springs per valve ?

I thought the commando engine had two valves springs per valve and maybe a dampener too loke the 340 .

my 273 only has one valve spring per valve.

just wondering if it may have had a valve job over the years and not put back to stock .

Thanks for any infomation !
john
 
Hey John, dad and I just put in a new cam and lifters etc and they were single springs with the damper...I thought the damper was another spring and we removed them for cam break-in, then realized they were the damper DOH!! Not sure if factory was dbl springs or not
 
4spdragtop said:
Hey John, dad and I just put in a new cam and lifters etc and they were single springs with the damper...I thought the damper was another spring and we removed them for cam break-in, then realized they were the damper DOH!! Not sure if factory was dbl springs or not
Click to expand...

Thanks !
yeah... what is the purpose of the dampener spring anyway?? is it just to stablize the main spring side to side movement ? something like that??

yes..... mine has only one main spring on each valve.

john
 
hi, the 273 came with a single spring only!! no doubles or dampners!! the 340 spring was the first to use a dampner.the specs on 273 is 100# seat, 184 # open. the comp cams spring 901 is better spring for 273 , 101# seat, 242# open. just food forthought. the dampner was to control valve float.
 
perfacar !.......
Thanks !
That was great info. I didn not know that !

ok..... my appears my heads have NOT been worker over before hand then. all oem then.
When I installed the new valve stem seals, the old seals were all in pieces !
it was smoking like a locomotive ! now with the new seals , it's better but when you get on it hard it still smoking . must be another issue .
 

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hi you have a pvc valve in motor?? they suck oil. the motor have lots of miles on it? prob rings are varnished? intake gaskets metal? use a sealer on them ? just curious.
 
perfacar said:
hi you have a pvc valve in motor?? they suck oil. the motor have lots of miles on it? prob rings are varnished? intake gaskets metal? use a sealer on them ? just curious.
Click to expand...

yes. it has a pvc valve on the valve cover . it a new one and works fine !
engines as 82K on the clock ..

the intake gaskets are a felpro style .. pressed cardboard .
yes I used orange permatex on all the port perimiters when I installed the ld4b intake . I read on this site I should NOT have used any permatex around the intake ports .. my mistake there . and that could be an issue sucking oil from the valley area.
heard that permatex desolves and gets suck into the port creating a void and suck oil from the valley .
That could very well be a spot to look at if the smoking does not clear up when on the throttle hard.
 
stroker402 said:
yes. it has a pvc valve on the valve cover . it a new one and works fine !
engines as 82K on the clock ..

the intake gaskets are a felpro style .. pressed cardboard .
yes I used orange permatex on all the port perimiters when I installed the ld4b intake . I read on this site I should NOT have used any permatex around the intake ports .. my mistake there . and that could be an issue sucking oil from the valley area.
heard that permatex desolves and gets suck into the port creating a void and suck oil from the valley .
That could very well be a spot to look at if the smoking does not clear up when on the throttle hard.
Click to expand...

Only put Permatex around the water ports.
 
perfacar said:
hi, the 273 came with a single spring only!! no doubles or dampners!! the 340 spring was the first to use a dampner.the specs on 273 is 100# seat, 184 # open. the comp cams spring 901 is better spring for 273 , 101# seat, 242# open. just food forthought. the dampner was to control valve float.
Click to expand...

Didn't know that. Thanks for the info. I put in some springs that were supposed to be for a 340 and they were pretty big. (diameter) I had clearance problems with the rockers. tmm
 

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yes ... i messed up there , but have been doing it that for 30 years and never had a problem. sucking oil there. but there is always a first !

I just read that about not to put sealer around the ports just after I installed the intake.

darn darn darn .lol
 
stroker402 said:
yes ... i messed up there , but have been doing it that for 30 years and never had a problem. sucking oil there. but there is always a first !

I just read that about not to put sealer around the ports just after I installed the intake.

darn darn darn .lol
Click to expand...

Stroker, if people didn't make mistakes they wouldn't put erasers on the end of pencils! LOL (I made a few mistakes with my 273 that I would like to fix this winter. Time for paint, got to pull the motor anyway.) tmm
 
toolmanmike said:
Stroker, if people didn't make mistakes they wouldn't put erasers on the end of pencils! LOL (I made a few mistakes with my 273 that I would like to fix this winter. Time for paint, got to pull the motor anyway.) tmm
Click to expand...

hahahaha ....lol
 
now that I think about the intake gaskets I purchased ,,,, the new gaskets I bought did not have that rubber sealant around the boarder by the port areas . that is why I put sealer there.. my mistake !
 
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