Hello everyone, I have mad a couple threads regarding my 1970, but need some more pointed advice as it relates to refreshing a 1970 155F. Details are as follows:
- Had been sitting under a tree in northern California since 1985
- I got the engine to turn over and fire spraying starter fluid down into a mess of an aftermarket carb
- Had Mark look over an OEM carb that i was going to put on, it was too far gone to rebuild, so I opted to go with a holley sniper. Most parts ordered.
- I stupidly took the head off before testing pressure
- Saw a lot of dirty coolant in the block, rear lower drain clogged with carbon.
- Rocker assembly removed
- Valves removed
- All accessories removed
My short term goal is to refresh the valve seats and clean up the top end for reassembly. I have high confidence it will run, how well is the big question. SO i don't want to commit too much $$$ to a rebuild or a valve job at this point. If it's too far gone, most of the parts I have ordered will be slapped on a 2F, as it seems the advice is predominantly to not rebuild a 1F.
So, my rough plan is as follows:
- Hot dip the head
- clean up the valves
- lap the valves/seats
- Cleanup the springs/retainers
- New valve seals
- clean up the rocker assembly and replace o-rings
- Clean out the sludge that is in the coolant chamber. Found some posts about using muriatic acid and just keep flushing it. It will be on an engine stand, so i can really flush it well, will just need to focus on keeping the cylinders lubed and dry
- Clean up headgasket surfaces, and place a new gasket
- Reassemble and check pressure before proceeding with adding everything to turn over with the sniper
Anything seem completely out of line? I am definitely learning as I go, so open to any and all suggestions.
Below are some pics for clarification and some other questions
I started cleaning a sring just to see what i was working with and it almost looks painted. I definitely saw this elswhere on mud, but it seems highly unlikely these springs were painted. Any thoughts? Also questioning why i would even clean them.
There are several "holes" like the second from the top left that appear to be completely blocked off from carbon buildup. Is it safe to assume these are coolant pathways that should be clear?
Image showing the "peanut butter" from the back coolant area.
Image showing the carbon buildup blocking the rear drain
- Had been sitting under a tree in northern California since 1985
- I got the engine to turn over and fire spraying starter fluid down into a mess of an aftermarket carb
- Had Mark look over an OEM carb that i was going to put on, it was too far gone to rebuild, so I opted to go with a holley sniper. Most parts ordered.
- I stupidly took the head off before testing pressure
- Saw a lot of dirty coolant in the block, rear lower drain clogged with carbon.
- Rocker assembly removed
- Valves removed
- All accessories removed
My short term goal is to refresh the valve seats and clean up the top end for reassembly. I have high confidence it will run, how well is the big question. SO i don't want to commit too much $$$ to a rebuild or a valve job at this point. If it's too far gone, most of the parts I have ordered will be slapped on a 2F, as it seems the advice is predominantly to not rebuild a 1F.
So, my rough plan is as follows:
- Hot dip the head
- clean up the valves
- lap the valves/seats
- Cleanup the springs/retainers
- New valve seals
- clean up the rocker assembly and replace o-rings
- Clean out the sludge that is in the coolant chamber. Found some posts about using muriatic acid and just keep flushing it. It will be on an engine stand, so i can really flush it well, will just need to focus on keeping the cylinders lubed and dry
- Clean up headgasket surfaces, and place a new gasket
- Reassemble and check pressure before proceeding with adding everything to turn over with the sniper
Anything seem completely out of line? I am definitely learning as I go, so open to any and all suggestions.
Below are some pics for clarification and some other questions
I started cleaning a sring just to see what i was working with and it almost looks painted. I definitely saw this elswhere on mud, but it seems highly unlikely these springs were painted. Any thoughts? Also questioning why i would even clean them.
There are several "holes" like the second from the top left that appear to be completely blocked off from carbon buildup. Is it safe to assume these are coolant pathways that should be clear?
Image showing the "peanut butter" from the back coolant area.
Image showing the carbon buildup blocking the rear drain
