This is the 4th time I’ve adjusted them and every time I do it I feel that I do a better job, but my car keeps sounding worse.
I adjusted them in April and the car sounded and performed great. Around 6 weeks ago I checked the compression and got some low reading (especially on #2, 60psi). So I thought I’d reset the valves and check the compression again. So I reset the valve clearance again and from that point my car has been driving funny. It was very clickity-clack, and wouldn’t rev past 5k.
Now today I reset them again(3rd X in two months), less clicking, but still won’t rev past 5k, unless I only press the throttle down ¼ the whole time.
Is this simple because I set them wrong, or could this be related to my low compression numbers, i.e. valve guides that are so far worn the extra .2mm is allowing valve float?
76 2.0 d-jet
Thanks guys
Samson
Dumb question, just to be sure: What are the exact clearances you are setting them too (intake and exhaust), and what year/size engine?
QUOTE (newto914s @ Jul 20 2005, 07:17 PM) |
76 2.0 d-jet |
He has a 76 2.0 D-Jet. I heard the car after he'd done them. Sounded like a Diesel John-Deer tractor.
I'm going to be interested to see how this plays out. As I've never done a valve adjustment before, I need to see what to look out for.
At the bottom of the Pelican Parts tech article on valve adjusting, there is an addendum of sorts where someone adds their version of the valve asdjusting proceedure- which valves are to be adjusted based on which valves are open- really helped my confidence in feeling like I was on the right mark (I always cross-checked to see if the timing marks showed on the impeller after I rotated the engine to get the different sets of valves to the "adjust now" position). Dang thats a long sentance. Hope it makes sense. Look at the "Valve adjustments made easy" tech article:http://www.pelicanparts.com/techarticles/914_valve_adjust/914_valve_adjust.htm
it may be that you did nothing wrong but there is a more serious problem.
when you adjust the valves, are they very far out of adjustment?
valves that tighten up by themselves may be stretching.
valves that loosen up by themselves may be dropping seats.
both these conditions never get better by themselves and will eventually destroy the engine.
could be you have a broken valve spring.
it may be time to pull off the rockers and REALLY LOOK at the valves and springs.
the valve adjustment procedure is not difficult once you "get it" but until it clicks in your head it can get confusing, so double-checking everything is always a good idea.
i don't really know how else you'd check for serious valvetrain issues; hopefully someone with more experience with /4 engines will have better ideas/
I think the valves are toast... exhaust valves.
M
THE VERY FIRST THING you do is make sure you have solid lifters. Look at the valve gear and report back. Hydraulic setups most often have solid spacers between the rockers, solids have springs in there. If you determine they're hydraulic lifters, you set them differently. If they're solids, you use the method I've listed here in the last couple of months. Then you pull the motor and fix the compression problem. A valve adjustment ain't gonna be the answer. You have a hard time passing 5K RPM because you're dragging along a dead hole. You may also have a timing problem. The Cap'n
I wish I could afford to travel around and fix these problems for people. You know You break it I'll come fix it.
Just think of all the cars that would be on the road now instead of on th jackstands.
Sort of a mission of mercy. You know will fix it for food and beer and a place to rest my head.
QUOTE (Joe Ricard @ Jul 21 2005, 08:13 AM) |
will fix it for food and beer and a place to rest my head. |
QUOTE (Joe Ricard @ Jul 21 2005, 10:13 AM) |
I wish I could afford to travel around and fix these problems for people. You know You break it I'll come fix it. Just think of all the cars that would be on the road now instead of on th jackstands. Sort of a mission of mercy. You know will fix it for food and beer and a place to rest my head. |
Hmm guess I better get mine done tonight Huh?
what kinda beer?
Man that would be the coolest job. Drive around dispatched from the club. Somehow keep track of where I'm at and the closest broken car gets next dibs. or really BIG problems get priority somehow. Just think how long I would be in Kentucky
Sorry RAND.
QUOTE (Joe Ricard @ Jul 21 2005, 10:40 AM) |
Hmm guess I better get mine done tonight Huh? what kinda beer? Man that would be the coolest job. Drive around dispatched from the club. Somehow keep track of where I'm at and the closest broken car gets next dibs. or really BIG problems get priority somehow. Just think how long I would be in Kentucky Sorry RAND. |
QUOTE (ArtechnikA @ Jul 21 2005, 05:06 AM) |
when you adjust the valves, are they very far out of adjustment? valves that tighten up by themselves may be stretching. valves that loosen up by themselves may be dropping seats. both these conditions never get better by themselves and will eventually destroy the engine. |
QUOTE (Cap'n Krusty @ Jul 21 2005, 06:58 AM) |
THE VERY FIRST THING you do is make sure you have solid lifters. A valve adjustment ain't gonna be the answer. You have a hard time passing 5K RPM because you're dragging along a dead hole. You may also have a timing problem. The Cap'n |
QUOTE (Cap'n Krusty @ Jul 21 2005, 06:58 AM) |
THE VERY FIRST THING you do is make sure you have solid lifters. Look at the valve gear and report back. Hydraulic setups most often have solid spacers between the rockers, solids have springs in there. |
QUOTE (redshift @ Jul 21 2005, 05:58 AM) |
I think the valves are toast... exhaust valves. |
Opps!
Attached image(s)
Ouch..
No. Headwork is expensive, but not REEEEEEAL expensive... hmm... valves... how much for parts and labor, Rimco, and SS valves fellas?
RON!!!!!!!!!!!
Holy sheepdip... sorry to be right this time.
M
QUOTE (Cap'n Krusty @ Jul 21 2005, 06:58 AM) |
THE VERY FIRST THING you do is make sure you have solid lifters. Look at the valve gear and report back. Hydraulic setups most often have solid spacers between the rockers, solids have springs in there. |
Looks like solid lifters to me...
I've got a passenger seat free if you don't want to drive yours...
Here ya go....You either have a shitload of crap in your engine or that exhaust valve is getting real hot (baked on oil and discoloration).....my opinion only
411 / 914, 356 / 912
Surface (includes grinding fin 356 / 912) - Pair............................... $50.00/$60.00
Open for Large Cylinders (411 / 914) - Pair.................................... $ 60.00
Valve Guides Installed (411 / 914) - Each....................................... $ 10.00
Valve Guides Installed (includes guides) -Each............................... $ 10.00
Seats Finished (3 angle) - Each...................................................... $ 10.00
Bead Blast - Each.......................................................................... $ 20.00
Large Valve Seats Installed (411 / 914) (356 / 912) - Each................ $30.00/$35.00
*Complete reconditioning available, Price depends on type of valves used.
Surface - each............................................................................... $ 20.00
Open for Larger Cylinders - Each.................................................. $ 25.00
Valve Guides (includes guides) - Each............................................. $ 12.00
Finish Seats (3 angle) - Each......................................................... $ 10.00
Recondition Complete (no new valves) - Each.................................. $105.00
http://www.rimcovw.com/prod01.htm
Doug, that passanger seat is starting to look pritty good.
I'm figuring a Grand to send both heads out and get them back ready to bolt on. Is that a realistic figure, too high, or too low. I would actually perfer to rebuild them myself(educational, and cheaper), but have read it's better to have them done by an expert(which I am not)
Sugestions?
send out. thats what i'm going to do. my heads arent bad, but they are old and original. oh and #1 spark plug hole is bad....
I don't think that valve has closed in a long time.
M
wait is that oil baked on the head surface?
Only one way that happens, like that, fire.
M
When it was all said and done it cost me $855.00 to have both of my heads rebuilt at RIMCO. That included welding up some cracks around the plugs and seats.
I didn't have any shipping charges though.
Can they adjust the valves there?
M
One finaly question.
What's the worst that can happen if I try to drive it another 100 miles like this? Just to run the last quarter tank of gas out of it. Am I asking for a dropped valve seat? Or worse? I basicly have to start it at least one more time, and figure I might as well run it out. Bad idea ?
For the head work I'm thinking Len Hoffman at HAM inc, if I can afford it, but I guess I should check out RIMCO too.
Thanks guys
Samson
if it were me, i'd find someone with a lawnmower and a gas can...
are you planning on just getting away with having the heads off? or are you looking to go deeper, to replace rings and rod bearings? if you have the cylinders and pistons out, it'll be a lot easier to look in and see if the cam is in fact OK. there it a reason that exhaust valve failed...
I'm hoping just head work.
But figured on changing the rings too. Are rod bearings also and easy WYIT?
I'm thinking the valve failed because of worn valve guides, and/or a shotty valve adjustment
The engine only has 32k on a rebuild
No other funky noises, previously?
Hmm.. yeah, maybe the guide. When was the rebuild done? How long ago?
M
QUOTE (newto914s @ Jul 26 2005, 03:12 PM) |
But figured on changing the rings too. Are rod bearings also and easy WYIT? |
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