Installing new Injection Pump and Injectors. Install new Hyd Lifters at same time?

[Old Goat]

I have my new R&D IDI Injection Pump and Injectors to install in the 86.
With things bouncing around between the ears, just had the thought with
351K miles, would it be a good idea to pull the Intake manifold, Valley Pan
and just go ahead and replace the Hydraulic Lifters and maybe the Push
Rods?
Maybe Iam thinking too hard, but read on some thread where high milage
lifters having a problem and maybe work Push Rod ends.


Goat

 

[KansasIDI]

I have my new R&D IDI Injection Pump and Injectors to install in the 86.
With things bouncing around between the ears, just had the thought with
351K miles, would it be a good idea to pull the Intake manifold, Valley Pan
and just go ahead and replace the Hydraulic Lifters and maybe the Push
Rods?
Maybe Iam thinking too hard, but read on some thread where high milage
lifters having a problem and maybe work Push Rod ends.


Goat

I think that’s a good idea, I have done it a couple times in the past, not very hard to do.

Have had a little bit of lifter trouble, but mostly higher mileage engines, up until I bought my 91, 56000 kilometers as of now… had 46k when I bought it

 

[Old Goat]

I have been doing some Google searching and reading tonight.
Quite involved, remove:
IP
Intake Manifold, CDR
Valley Pan & Drain Plug
Valve Covers
Rockers
Push Rods
Hyd Lifter lock in plate (what I called it)
Remove Lifters.

Clean things up, and put it back together the reverse of disassemble.
Use Torque Wrench and lock Tight.

Typing this up, just remembered I dug into a 92 7.3 at PNP a few years
back. kept the Rockers, Push Rods, Lifters, Valley Pan, Manifold etc....
If my 6.9 still has the original Rockers I could swap these in as they
didn`t look to have a lot of wear, and be an upgrade over the 6.9.

I was looking at a lot of sites selling Hyd Lifters, prices are all over the
place....and majority are China made, but the sellers don`t mention it,
some on E-bay do though. These high performance Diesel sites sell at
a high price, and most likely same China made.

So what are you experts building these things using?


Here is an interesting thread from FTE a guy taking a Hyd Lifter apart.
Exploded view.

6.9/7.3 Hydraulic valve lifter internals (pics) - Ford Truck Enthusiasts Forums

Pre-Power Stroke Diesel (7.3L IDI & 6.9L) - 6.9/7.3 Hydraulic valve lifter internals (pics) - Since there have been a couple recent threads on valve lifters and several discussions on the IDI valve train in general, I decided I should stop being lazy and open up a lifter. I am curious about what...

www.ford-trucks.com

Goat

 

[IDIBRONCO]

I try to stick with a bigger name brand such as Sealed Power or Melling (to name a couple). I haven't been burned yet.

 

[Old Goat]

Thanks Bronco. I have been searching on Google, e-Bay, Amazon and other sites
come up.
Some are dirt cheap and some off the chart.
Saw this guy on E-Bay, Lifters made in Germany, looks encouraging.
Asked seller about shipping, $6.05 for one, how much for 16?
Wait and see what he says.
$24 ea, that`s $384.00

Mentions, has Rollers, they all have rollers for these engines.
None have flat tappets from what I have read.

ATP HYDRAULIC TAPPET ROLLER LIFTER (Fits FORD Engines) 8C3Z6C329B 6.0, 6.4, 6.9L | eBay

The roller wheel reduces friction and increases durability compared to flat tappet lifters. Hydraulic roller lifters can handle much more aggressive cam profiles than flat tappets, reducing the performance potential unlock.

www.ebay.com

Goat

 

[IDIBRONCO]

they all have rollers for these engines.
None have flat tappets from what I have read.

Correct. Rock Auto lists both Sealed Power and Melling. They're both listed for less than $24 each. Pioneer may or may not be ok. Just for the record, I didn't look on there before I made my post.

 

[Old Goat]

Classic Diesel Design has Silicone Valve Cover Gaskets.
Any one use them?
I have seen Cork and Rubber not Silicone.
Did some Google searching and can`t find any info on them.

6.9/7.3 IDI Silicone Valve Cover Gasket Set

Aftermarket replacement valve cover gaskets featuring a 3D printed silicone design versus conventional injection molded rubber valve cover gaskets for improved sealing.

classicdieseldesigns.com

Ordered a set of Elgin Push Rods, U.S.A made. should be here next week.
Might as well replace everything as I work my way up from the bottom.


Goat

 

[Rocknit4x4]

I’ve got the silicone valve covers - no issues here. They installed easy and no leaks so far.

 

[Old Goat]

Thanks, think I`ll order the set from Classic Diesel.
The rubber one`s eventually turn into a piece of hard plastic.

EDIT:
Just ordered them, WOW!! Shipping is more than the item,
Dang, Iam in the wrong business.
The price of Hay has gone up, and ya gotta feed the Horse pullin the Wagon.

Shopping cart

Product image	Description	Quantity	Price
You must be registered for see images attach 1	6.9/7.3 IDI Silicone Valve Cover Gasket Set	1	$12.50

Scroll for more items
Cost summary

Description	Price
Subtotal	$12.50
Shipping	$13.98
Total	USD $26.48

Goat

 

[TahoeTom]

Ideally the valley pan would be replaced. It is the intake gasket and has a pressed pattern that seals when compressed. CDD sells them as they are available now made by PAI. I think that guy on ebay is still trying to sell the last OEM one in existence for $999. I know many members were able to reuse them. On 6.9s there are open water jacket ports that the VP seals. The 7.3 heads have cup plugs in those ports so sealing isn't as big an issue. Try to get the old one off without messing it up. There is RTV under the back edge and front, and carried up onto the head, so you will have to clean those surfaces. With your 6.9 take extra care to seal around those coolant ports. There are 8 of them. I am going to look for the instructions that came with the pan I installed when they were more commonly available. Check the used rockers where they ride on the valves. Some used ones are quite worn. They are available new from Rock Auto but not cheap for a complete set. CDD also sells sets.

I just bought some of those push rods from CDD myself as I have my engine apart now. I bought a set of the Melling lifters from Rock Auto. After looking at CDD site again I may spend some more money there. His stuff is well packed when shipped.

 

[Old Goat]

I have one used Valley Pan I pulled off a 93 at PNP.
Not in too bad of shape, have a thin Putty Knife I used
under the edge to break the seal.
If Iam careful with the one on my 86, can reuse it.

I also kept the Rocker`s as they did not have a lot of wear.
Be an up grade over the 6.9 unless some prior owner
changed them.

What I have seen on line, the 7.3 new rocker sets are around
$35 +.

I have seen that guy on E-Bay, we need to string him up.
Any thing goes on E-bay.


Goat

 

[IDIBRONCO]

Any thing goes on E-bay.

Only if someone's dumb enough to pay for it.

 

[Old Goat]

Here is a cheaper one...

83-94 Ford 6.9 7.3 IDI Diesel Intake Valley Pan Gasket New | eBay

<p>Brand new valley pan for Ford 6.9 IDI or Ford 7.3 IDI. This product is carefully shipped and is a high quality product. Each pan is shipped brand new, never used, in its original box. Thank you for your business!</p>

www.ebay.com

Seems like they were $35 before Covid.....or am I dreaming?


Goat

 

[IDIBRONCO]

I think they were more than that.

 

[TahoeTom]

CDD sells the same part, same brand (PAI) for half that price.