Wrong lifters

[hysteric]

Just tried to run in a new hydraulic cam in my small block with what has turned out to be big block lifters.

I Got the lifters from a another small block project i purchased in an unmarked box so made the assumption they were for a small block but ultimately had no idea they were for a big block until they were run in and started to become very noisy. On comparing the oil band on the other small block lifters i had lying around which are Comps and Hylift Johnsons HT2011's the Big block lifters have a higher oil band which when placed on the cam at maximum lobe lift of 0.495 is really close to uncovering the oil band.

Please note some lifters are sold as for both BB and SB.

Has anyone else encountered this?

[Geoff2]

They might be Pontiac lifters; they have a higher oil band.

[hysteric]

I'm pretty certain they're BB Chrysler

BB look like this:


Small block:


The BB mopar lifter band actually starts where the small block lifter band finishes.

[Krooser]

Is this a small block Mopar engine?

[Walter R. Malik]

Just tried to run in a new hydraulic cam in my small block with what has turned out to be big block lifters.

I Got the lifters from a another small block project i purchased in an unmarked box so made the assumption they were for a small block but ultimately had no idea they were for a big block until they were run in and started to become very noisy. On comparing the oil band on the other small block lifters i had lying around which are Comps and Hylift Johnsons HT2011's the Big block lifters have a higher oil band which when placed on the cam at maximum lobe lift of 0.495 is really close to uncovering the oil band.

Please note some lifters are sold as for both BB and SB.

Has anyone else encountered this?

This is probably a Mopar ... Chevrolet & Ford big block and small block lifters are the same.

[tjs44]

Does anyone make a true pontiac lifter,have been told they are all SBC?Tom

[tjs44]

To be clear,besides true GM pontiac lifters.Tom

[CamKing]

Does anyone make a true pontiac lifter,have been told they are all SBC?Tom

The Pontiac Hydr F.T. lifter is part# 951. They're different the the Chevy # 817, and readily available.

[CamKing]

I'm pretty certain they're BB Chrysler

BB look like this:


Small block:


The BB mopar lifter band actually starts where the small block lifter band finishes.

Yes. The top lifter is the 976, for the big block mopar
The bottom one is the 2011, for small block mopar

[Walter R. Malik]

In GM engines, that #951lifter is also used in a lot of Oldsmobile and Cadillac engines; (it has about a .050" taller pushrod seat).

In that Mopar situation, I have seen people use small block lifters in a big block but, not the other way around.

[Krooser]

Dumb comment deleted...

[MadBill]

A little tip hysteric: In the wide world of racing, if you don't specify manufacturer, "BB" & "SB" are assumed to be Chevrolets.

[PRH]

As the OP discovered....... BB Mopar hyd lifters don’t work in a SB....... but the SB lifters do work in a BB.

[hysteric]

A little tip hysteric: In the wide world of racing, if you don't specify manufacturer, "BB" & "SB" are assumed to be Chevrolets.

I did in my second post.