What timing cover are you using with a 7.3 inch damper

[fat-360]

G’day. I’ve bought this type of harmonic balancer, with the timing case pictured, balancer is 7’3 inch diameter, looks like it will hit the timing marks on the timing case before the balancer will go all the way on.
Any ideas?

 

[Plymouth 65]

The early 273 timing cover uses the bolts on timing tab, not the casted one as pictured. 65

 

[WV64Signet]

The water pump discharge will obscure that cast timing tab.

The bolt on places the timing marks on the other side.

 

[Dana67Dart]

The early 273 timing cover uses the bolts on timing tab, not the casted one as pictured

Up to thru 68.

But the bolt on timing mark might also interfere. You may have to make a custom one.

 

[fat-360]

Ok, I’ll add I have a late model water pump too. Maybe I’ll re ask the question “ what timing cover do I use for a 7.3 inch balancer”….

 

[Dana67Dart]

“ what timing cover do I use for a 7.3 inch balancer

As mentioned 68 and older does not have molded in timing mark.

 

[mygasser]

Ok, I’ll add I have a late model water pump too. Maybe I’ll re ask the question “ what timing cover do I use for a 7.3 inch balancer”….

the bottom hose is the other side on the later pump so the radiator will need altering/changing out.
neil.

 

[Dana67Dart]

The water pump discharge will obscure that cast timing tab

Without power steering you can JUST see the marks on the driver's side with the cast iron water pump.

I have a stock 67 273 with a 70 up cover so I have both marks, AND on a side note the two are not 90 deg apart. So if the marks on the damper are designed for a pre 70 SB they will be off with the 70 up cover and visa versa.

 

[fat-360]

The early 273 timing cover uses the bolts on timing tab, not the casted one as pictured. 65

Thanks. Tho not relevant.

 

[fat-360]

The water pump discharge will obscure that cast timing tab.

The bolt on places the timing marks on the other side.

View attachment 1716349884

View attachment 1716349885

Thanks. I’ve got a later type water pump

 

[fat-360]

As mentioned 68 and older does not have molded in timing mark.

Well in Australia, this( whatever this is) is the only one available.

 

[67Dart273]

Thanks. Tho not relevant.

Yeh, it is relevant. He thought you were setting up an early engine, at the time he posted that, you had not mentioned you are using a late water pump. These little details are important. MY question is, IS this balancer alleged to fit a SB or is it maybe for a B/ RB? Otherwise, I see no solution other than either using the early cover, or maybe cutting off the later cast tab and having the cover somehow plugged, not sure you can weld that "pot metal" alloy, or mill it flat and use a screwed on gasketed patch

The other possible issue with that big balancer is thickness front to rear. What is that going to do with the pulley situation?

 

[fat-360]

Yeh, it is relevant. He thought you were setting up an early engine, at the time he posted that, you had not mentioned you are using a late water pump. These little details are important. MY question is, IS this balancer alleged to fit a SB or is it maybe for a B/ RB? Otherwise, I see no solution other than either using the early cover, or maybe cutting off the later cast tab and having the cover somehow plugged, not sure you can weld that "pot metal" alloy, or mill it flat and use a screwed on gasketed patch

The other possible issue with that big balancer is thickness front to rear. What is that going to do with the pulley situation?

Where did I say I was setting up an early engine? Now this will upset you, I have an early 273 pump with this case on a 410, with W2’s works fine.(period look for the car).
This is why I disappeared of this forum for so long….
Yes it’s a smallblock damper

 

[mygasser]

Where did I say I was setting up an early engine? Now this will upset you, I have an early 273 pump with this case on a 410, with W2’s works fine.(period look for the car).
This is why I disappeared of this forum for so long….
Yes it’s a smallblock damper

don't be so touchy, they're only trying to help . if you didn't supply all the relevant info then suggestions can be 'as you say' irrelevant. take a breath and start again........
neil.

 

[fat-360]

don't be so touchy, they're only trying to help . if you didn't supply all the relevant info then suggestions can be 'as you say' irrelevant. take a breath and start again........
neil.

Thanks. I did supply all the relevant information. That’s all I wanted to know. I’ve been in Chryslers for over 30 years. I know what come out with what, that car in my profile picture makes over 600hp, and I built it.
I just want to know what timing covers are we using with a 7.3 inch dampener…..

 

[AJ/FormS]

I thought a 273 was an early SBM.
The cover shown is a very late one.
The balancer appears to be keyed for a passenger side tab.
If it was my problem, I'd mill off the Driverside tab and mig the hole closed. Then install the balancer, shimming it out as may be required, then Find whatever piston-TDC gets you in the ballpark on whatever side you care to use, and index the cover accordingly. Then when you go to set the timing, don't forget which piston you indexed.
Badaboom.
In your case with a calibrated balancer, you don't need a tab anyway; all you need is a fixed stationary reference point somewhere with any appropriate piston at TDC, that gets you visibility to the mark, with all the accessories bolted on.
I have had to, on old Dodge vans, put the mark on the very bottom and read the timing while laying on my back.
On others I had to take the doghouse cover off, and drill a hole in the Bellhousing, put #1 at TDC, then scribe a mark on the convertor in the center of the window.
Whatever it takes. The mark can be wherever you want it to be. Well, with an indexed Balancer, you are sortof limited to four places, two of which you will need to stand on your head to read, lol.
If that's not good enough well, you can always put a timing tape over it.

 

[Dana67Dart]

G’day. I’ve bought this type of harmonic balancer, with the timing case pictured, balancer is 7’3 inch diameter, looks like it will hit the timing marks on the timing case before the balancer will go all the way on.

So you bought 2 parts that you say are not compatible.


several people pointed out that the early timing cover up to 68 does not have a cast in timing mark so perhaps your damper will fit with them.

The early 273 timing cover uses the bolts on timing tab, not the casted one as pictured. 65

Then you add that you have a late (IE aluminum) water pump and ask again which cover you should use

Ok, I’ll add I have a late model water pump too. Maybe I’ll re ask the question “ what timing cover do I use for a 7.3 inch balancer”….

so I pointed out that you can use the 68 and older cover that does not have cast in timing marks

As mentioned 68 and older does not have molded in timing marks

to which you reply:

Thanks. Tho not relevant.

then you say this:

Well in Australia, this( whatever this is) is the only one available.

So I guess you don't have a choice you will have to use the 70 up cover with the cast in timing marks and figure in a way to make it work.

have you ever thought it might be YOU?

This is why I disappeared of this forum for so long….

64-68 timing cover NO CAST IN MARKS

69 (one year only) cover note the pass side cast in marks

70-72 cover note the drivers side cast in marks and the smaller front crank hole for a rear entry seal

73- 90? cover note the drivers side cast in marks AND the larger front crank hole for a front entry seal

ALL of these can be used on a SB


I really hope this helps

 

[4spdragtop]

Get a 67 cast iron water pump and 67 timing cover with a simple bolt on tab.
I have a Trickflow 19010(7.010 dia) with a 69 cover.

 

[mygasser]

on my 318 i used a 70-72 timing cover with the 64-68 iron pump and bolt on timing tab. my balancer had tdc marks for early and late covers/timing tabs (marks about 90 degrees apart).
neil.

 

[67Dart273]

Where did I say I was setting up an early engine? Now this will upset you, I have an early 273 pump with this case on a 410, with W2’s works fine.(period look for the car).
This is why I disappeared of this forum for so long….
Yes it’s a smallblock damper

I DID NOT SAY you said that. In fact you didn't say WTF you have. How are we to know? Have fun and good luck.

I'll repeat that so you can read it. YOU DID NOT SAY WTF you had. But you already know everything there is to know about SB Mopars so have at it.

So far two of us have suggested you mill off the cast tab on the late cover and do whatever you have to do to plug the hole.