New motor 468 cui
Safety Car
Joined: Jan 2009
Posts: 4,000
Likes: 299
From: New York
Well i am a newbie on this, but what else could it be?
Engine is built with all new parts inside and heads have new valves, guides fixed for higher lift, springs and so on by an old gearhead.
All parts from Chris.
Talked to an experienced enginebuilder and he said that bad lifters are very common.
Dont know were else to look if its not a lifter.
Sound is like a valve having to large gap between rocker and valve stem. Will try to get a video of it later.
Engine is built with all new parts inside and heads have new valves, guides fixed for higher lift, springs and so on by an old gearhead.
All parts from Chris.
Talked to an experienced enginebuilder and he said that bad lifters are very common.
Dont know were else to look if its not a lifter.
Sound is like a valve having to large gap between rocker and valve stem. Will try to get a video of it later.
But my concern is your getting noisy as it warms up and that says clearance issue on something .
So if you can record the ticking or noise it would be a big help
Safety Car
Joined: Jan 2009
Posts: 4,000
Likes: 299
From: New York
That sure sounds like the valve train. And its loud as hell.
That is a hydraulic roller ?
How are you finding zero lash before you adjust the rockers ?
I would personally pull the easiest valve cover
I would start the motor and with it running adjust one set of noisy lifters.
Many will complain at this suggestion or say dont do it.. BUT I recommend it because your new to this and it will be a way to know easily and quickly if your adjustments are wrong.
So :
Pull valve cover start motor and go to loudest set of valves. Use aluminum foil or a rag to stop oil from spitting everywhere.
Slowly back off the adjustment nut until you here it clicking loudly. IT will take very little backing off to get a clicking noise.
Now slowly tighten until that clicking goes away STOP your at zero lash.. Now 1/4 turn at a time set the lash based on Straubs suggestion 1 or 1.5 turns .. DO THIS SLOWLY because the motor may want to stall as it recovers from each 1/4 turn.
Do this to the other valve in that cylinder and move down the head adjusting all 8 that way. If it eliminates the clicking do the other side of the motor .
That is a hydraulic roller ?
How are you finding zero lash before you adjust the rockers ?
I would personally pull the easiest valve cover
I would start the motor and with it running adjust one set of noisy lifters.
Many will complain at this suggestion or say dont do it.. BUT I recommend it because your new to this and it will be a way to know easily and quickly if your adjustments are wrong.
So :
Pull valve cover start motor and go to loudest set of valves. Use aluminum foil or a rag to stop oil from spitting everywhere.
Slowly back off the adjustment nut until you here it clicking loudly. IT will take very little backing off to get a clicking noise.
Now slowly tighten until that clicking goes away STOP your at zero lash.. Now 1/4 turn at a time set the lash based on Straubs suggestion 1 or 1.5 turns .. DO THIS SLOWLY because the motor may want to stall as it recovers from each 1/4 turn.
Do this to the other valve in that cylinder and move down the head adjusting all 8 that way. If it eliminates the clicking do the other side of the motor .
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Yes, its a hydraulic roller, straub cam.
I have set it to one full turn according to Chris recommendation.
Zero lash with warm Engine, backed of untill i could move pushrod freely and then tighten according to recommendation.
Have reset it twice, without luck....i am going to replace lifter 1 and 8.
Allready changed out 4 and 6.
Knocking is on passenger side.
If it does not go away, i dont know what to do next......
I have set it to one full turn according to Chris recommendation.
Zero lash with warm Engine, backed of untill i could move pushrod freely and then tighten according to recommendation.
Have reset it twice, without luck....i am going to replace lifter 1 and 8.
Allready changed out 4 and 6.
Knocking is on passenger side.
If it does not go away, i dont know what to do next......
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
fool proof as it gets
better to clean up a little oil mess than keep doing what youre doing
Sometimes spinning the pushrod gets it sometimes you gotta look for up/down play. Plus knowing if youre in the right position to set them
Doing this running eliminates all the guesswork bet they quiet down
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Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
Go with the advice to adjust it with the engine running.
It can be difficult to find the zero lash point because of the springs in the lifters.
I see your engine shakes just as bad as mine does. Maybe it's just a Straub cam thing.
It can be difficult to find the zero lash point because of the springs in the lifters.
I see your engine shakes just as bad as mine does. Maybe it's just a Straub cam thing.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Well...adjust lifters with engine running is not gonna solve this....
Done adjusting, all lifters are fine, exept maybe one...
Talked to Chris and he thinks its something else...makes me worried.
He shall get a second opinion from someone else, lets see what that brings....
Done adjusting, all lifters are fine, exept maybe one...
Talked to Chris and he thinks its something else...makes me worried.
He shall get a second opinion from someone else, lets see what that brings....
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Im in Sweden and you are in California, wich is by the way my favourite destination to vacate, done it several times.
Story continues, will keep you posted.
Safety Car
Joined: Jan 2009
Posts: 4,000
Likes: 299
From: New York
Well...adjust lifters with engine running is not gonna solve this....
Done adjusting, all lifters are fine, exept maybe one...
Talked to Chris and he thinks its something else...makes me worried.
He shall get a second opinion from someone else, lets see what that brings....
Done adjusting, all lifters are fine, exept maybe one...
Talked to Chris and he thinks its something else...makes me worried.
He shall get a second opinion from someone else, lets see what that brings....
Let straub fix it then. At this point it can tick and clank all day every day I sure wont offer any advice .
Last edited by diehrd; Jul 6, 2016 at 04:36 PM.
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
Thread Starter
Racer
Joined: Jun 2015
Posts: 315
Likes: 20
From: Vasteras, Sweden
The source of my engine knock is found.
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Glad you found it. Bummer but at least relief you have your answer
Trade ya, Im sick of it here .
Bring $..lots of it and a tolerance for traffic.
Im in Sweden and you are in California, wich is by the way my favourite destination to vacate, done it several times.
Bring $..lots of it and a tolerance for traffic.
Drifting
Joined: Jul 2013
Posts: 1,299
Likes: 93
From: Tri-Cities TN
The source of my engine knock is found.
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Its the piston domes that have very slightly hit the head, nothing is broken.
Some light machining to the heads will fix it.
Cause for this is that i have shaved heads and decked engineblock.
I have Mahle forged pistons with 28cc dome.
So all you guys out there building your own engine, have this in mind so it wont happen to you!
Kudo's to you sir for staying the course and getting this figured out. Once your fixed you can enjoy the car sir. Thank you for posting this. It will be good for others that are building BBC to learn from.
