Can someone provide the dimensions of the brass push rod guides for an open valve engine?
Thanks very much,
Can't help with the size, there is a NOS set on Ebay at the moment, cast iron ones.
Parts books list them as iron as well, maybe the brass ones were a later replacement type?
Agree with Frank, originals would be cast iron.
I thought that only the valve guides were cast iron and that the push rod guides were brass. All the open valves I have seen in person and pictures are that configuration. Is that not correct?
Early valve guides were I piece cast iron. I've seen some with brass sleeves, but I'm sure that was done on a later rebuild.
There was a thread back in 2009 on the subject of guides, as Kim says, brass would be for rebuilds, easier to get than cast.
Curt asked about push rod guides, as far as I know they were brass. The valve guides were cast iron.
Yes Don, and that's what is in that photo, cast iron valve guides and cast iron push rod guides as listed in the period Ford parts books.
I found them,
Factory # was 427, no mention of what metal,
up to early 1911, some parts book uses factory part # and some #3059 with no mention of what metal, then the parts books change to 2 part #'s
3059 and 3059-1/2, brass and iron.
Which was first? still a ?
I think think Curt is asking about the Tappet (push rod) guides?
I had some made of bronze but I don't have the dimensions handy.
Yes Robbie, that's what we are talking about.
My originals are June 1909 and they have a spiral in them and are made of brass. I am pretty sure brass came first as I saw number 22 and it had brass Tappet guides in it.
I also had some valve guides made and they were cast as were the originals.
Now I could be wrong as a lot could have been changed in 106 years. My block also did not have any Babbitt on the top mains for the crank. Main caps were babbitted.
Others would know more than I.
I had my Tappet guides cut for an "O" ring also to keep the oil in.
My '10 is a March car and had brass guides for the lifters. When I got the car it seemed to be an original unmolested engine as everything was worn to the point of being almost unusable. I made new ones out of oilite (sp?)bronze thinking that they would be self lubricating. Seems to work well. I just assumed that was the way they were originally.
Yes, I am asking about what would today be called lifter guides, may be called tappet guides, but I believe in Model T lingo are pushrod guides.
Does anyone have their dimensions?
Diam .630". The top of the guide sticks above the block .550". It is flush with bottom of block. To get the length add .630" to the thickness of the block where the guide inserts. These are original bronze lifters I measured from a 1910 block. You can get modern bronze valve guides the right diameter and hole size for the lifters, but they are too long so you have to cut them down. Sorry, I can't give the actual length, but cam is in the block and I have no way to measure it.
Oops, add .550 to the thickness of the block to get the right length. Unlike what Frank shows in the photo, the lifter guides are the same diameter as the hole in the block.
Thanks very much!
I can measure mine too if I can locate them.
What year engine are you working on?
I think its for Curt's 1909 touring
Brass lifter guide is from my 1909. It's 1.560 tall, .626 of and .436 Id. Cast iron valve guide is also 1909.