Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 928 Technical Forum (http://forums.pelicanparts.com/porsche-928-technical-forum/)
-   -   Almost done!!! NEED HELP! (http://forums.pelicanparts.com/porsche-928-technical-forum/473349-almost-done-need-help.html)

BB500 05-07-2009 08:12 PM

Almost done!!! NEED HELP!
 
Ok guys! I have the water pump on, AND the timing belt on the old engine. (I just need to see what's going on with the old engine, and I KNOW you guys are too!!!)

BUT!!!!!!!!!!!

I [I]can't [I] turn the engine over by turning the crank with a socket wrench, even with ALL 8 spark plugs out! This can't be good!!!

Dangler??? What do you think? I think the "mechanic" that messed with my cam gears really screwed things up.
Does anybody know how to "start over"??? I mean, is there a way to "reset" and put everything at "0" so to say????

please let me know, I'm going to be back on it first thing in the morning. Oh, the spark plug galleys were flooded with oil by the way.

Here are pictures of where everything is lined up at.
http://forums.pelicanparts.com/uploa...1241755864.jpg
http://forums.pelicanparts.com/uploa...1241755885.jpg
http://forums.pelicanparts.com/uploa...1241755901.jpg
http://forums.pelicanparts.com/uploa...1241755924.jpg

Imo000 05-07-2009 08:15 PM

Doee everything line up when you are at O/T (TDC)?

BB500 05-07-2009 08:28 PM

I cant turn the crank :(

Imo000 05-07-2009 08:32 PM

Did you remove the flywheel locking tool?

BB500 05-07-2009 08:32 PM

Everything seems to be lined up perfectly right now, see pic how the mark on the backing plate lines up with the divots on the gear.

BB500 05-07-2009 08:34 PM

haha... yeah, Dano has it, but that was what I was thinking too, I had to double check even though I knew I gave it back!

Imo000 05-07-2009 08:36 PM

Quote:

Originally Posted by BB500 (Post 4651835)
Everything seems to be lined up perfectly right now, see pic how the mark on the backing plate lines up with the divots on the gear.


What I see is that they are both about 3 teeth too forwards but the crank is at the 45 degree mark. From this point it's difficlut to tell if the marks will lline up when the crank is at TDC.

BB500 05-07-2009 08:43 PM

This is pretty much where they were when I pulled the belt, but one of the gears might be one tooth left or right of the other.

Danglerb 05-07-2009 09:31 PM

Bear in mind I am NOT experienced with 32v motors except to take them apart. ;)

Is the car in park?

When you try to turn the motor (usually always clockwise), what seems to be binding?
Use a finger to feel the tension on various segments of the belt and that should tell you what doesn't want to move.

Try wiggling the different parts, see if something is frozen. If nothing wants to move, I'm thinking the belt needs to come off and then recheck movement of each part. (as long as the crank stays "close" to 45 degrees a little movement should be harmless).

Be careful no junk gets down the spark plug holes.

Niles 05-07-2009 11:40 PM

I count 48 teeth on the camshaft sprocket. So 45 degrees of crank rotation would be 22.5 degrees for the cam. 360 divided by 22.5 is 16. 48 divided by 16 is 3. So the cam should be 3 teeth off. It appears to be set correctly.

I went back to the manual and looked it up. With the crankshaft at the 45 degree mark before Top Dead Center. "Camshafts may be turned without damaging the valves after aligning the 45 deg. mark."

MPDano 05-08-2009 04:51 AM

Quote:

Originally Posted by BB500 (Post 4651828)
I cant turn the crank :(

You were able to turn the crank BEFORE you put the Timing Belt on, correct?

I do see a post saying your marks are on now. Does it turn now? #1 Piston at top?

Also, is 4|5 the Correct TDC?

bjenkins 05-08-2009 08:26 AM

Is the car in neutral or are the rear wheels up? If not, you're trying to move the entire car.

Dean_Fuller 05-08-2009 08:58 AM

This could be off. On the 32V cars you first set crank at T/D and align back notches to notch in back plate. Then turn crank to 45 degs ( this is the only crank position where the cams can be turned WITHOUT interference) then YOU mark the cam gears. Mine were already marked when the PO did the first job....Once aligned turn crank 2 complete rotations to make sure they still align. If the motor will not rotate try removing the plugs.

MPDano 05-08-2009 09:39 AM

Is 4|5 the Correct TDC? Ok, found my answer somewhere else. Here are pics of what it should look like.

https://www.928gt.com/images/wallytips/tbeltfig5.jpg

https://www.928gt.com/images/wallytips/tbeltfig6.jpg

Quote:

With the marks that you added (FIGURE 5), you can install the new timing belt at the 45 degree position.

Since this is the only position that is certain to allow camshaft movement with no danger of valve

crashing, and since the cams want to move suddenly and unexpectedly (due to valve spring pressure),

this is the safest position at which to install the belt. Remember that all belt slack should be at the

tensioner. Stuff a rag under the crank pulley to hold the belt on the pulley and make installation much

less frustrating. Pull the belt tightly over the oil pump, then the driver’s side (for left-hand drive cars) cam

sprocket, and apply a spring clamp or clothespin to hold it in place.



Go around the water pump, and pull the belt tightly over the passenger’s side (for left-hand drive cars)

cam sprocket, applying another spring clamp to hold it in place. Check the cam timing marks. Reinstall the

tensioner arm and tensioner, and run the tensioner bolt up to snug the belt. Remove all rags and clamps,

remove the flywheel lock, and temporarily install the crank pulley. Turn the engine to top dead center and

check all timing marks. Remember that the cam timing marks are on the back side of the cam sprocketsÑ

these are the ones that you can see through the air tubes on the MY 1986 and up engines. Their positions

are indicated in the illustration, but you can’t see the marks from this angle (FIGURE 5). Turn the engine

two turns, and check all timing marks.




BB500 05-08-2009 09:41 AM

Since the car is automatic, I should be able to turn it in any gear position correct? I'm not even sure where the shifter is to tell you the truth. Should be park, but it may not have been put back completely. I will check when I go out there.

BB500 05-08-2009 09:42 AM

plugs are removed as of last night.

rjm65 05-08-2009 09:51 AM

Quote:

Originally Posted by Dean_Fuller (Post 4652652)
This could be off. On the 32V cars you first set crank at T/D and align back notches to notch in back plate. Then turn crank to 45 degs ( this is the only crank position where the cams can be turned WITHOUT interference) then YOU mark the cam gears. Mine were already marked when the PO did the first job....Once aligned turn crank 2 complete rotations to make sure they still align. If the motor will not rotate try removing the plugs.

Since the gears looked like they weren't marked before the belt was taken off, can the crank be set at 45 deg, turn the cams until the marks line up, turn crank back to TDC, then put the belt on?

Someone did the math previously on how many teeth the cam gears should be off the mark at 45 degrees, but can someone confirm he's off (think it was 3 teeth) in the right direction?

MPDano 05-08-2009 09:55 AM

Quote:

Originally Posted by rjm65 (Post 4652743)
Since the gears looked like they weren't marked before the belt was taken off, can the crank be set at 45 deg, turn the cams until the marks line up, turn crank back to TDC, then put the belt on?

Someone did the math previously on how many teeth the cam gears should be off the mark at 45 degrees, but can someone confirm he's off (think it was 3 teeth) in the right direction?

See figure 5 in my post above yours.

BB500 05-08-2009 10:04 AM

You know, after looking at Dano's picture has me thinking... One of the gears was three teeth past and the other was four. I turned the one gear so it was three teeth past to match up with the other one. Now I'm wondering if I should have turned them both to four since that is how they are in Dano's picture...

MPDano 05-08-2009 10:07 AM

Pictures are from 928gt.com, I am betting these are the absolute correct way they should look like.

rjm65 05-08-2009 10:08 AM

WAIT! How are you trying to turn the crank over? :confused:

Didn't the Craig's List Bandit Mechanic make off with your 27mm socket?!?!?!? :eek:

BB500 05-08-2009 10:10 AM

I always loan my "generic" brand tools to strangers!

BB500 05-08-2009 10:11 AM

hahaha... You didn't think I was using the "sideways visegrip" method he was employing do you!

BB500 05-08-2009 10:38 AM

Guess what. BY PURE CHANCE I happened to be going through some old pics on my cell phone, and found a few pictures I took of the cam gear locations WAY back when I removed the belt. Well, the gears are EXACTLY where they are supposed to be...

Any other ideas why the engine wont turn? I'm going outside to find out what position the shift lever is in.

Danglerb 05-08-2009 11:23 AM

Don't apply too much force, something has to be binding. Try and locate the segment of the belt that has increased tension on one side and not the other as you try to turn the motor. If you can't find it that way, I think the belt needs to come off and each part checked for free movement (just not much away from the 45 on the crank).

Ignore what I said about PARK, too late at night for me to think. PARK locks the rear wheels, but torque converter would allow free motion of the motor.

rjm65 05-08-2009 11:58 AM

Was the CL Mechanic able to spin one or both cams by hand?

BB500 05-08-2009 12:21 PM

OK! I'm an idiot. The engine DOES spin! I just wasn't turning hard enough (i'm used to motorcycle engines.....)

BB500 05-08-2009 12:23 PM

Well, I'm going to go put everything back together and put some fresh oil and coolant in it, and give it a whirl!

MPDano 05-08-2009 12:27 PM

Quote:

Originally Posted by BB500 (Post 4653070)
OK! I'm an idiot. The engine DOES spin! I just wasn't turning hard enough (i'm used to motorcycle engines.....)

Duh! ;)

MPDano 05-08-2009 12:30 PM

Quote:

Originally Posted by BB500 (Post 4653076)
Well, I'm going to go put everything back together and put some fresh oil and coolant in it, and give it a whirl!

Take pics of the cam gears and harmonic at TDC.

Spark Plugs OUT! Run Compression checks on all cylinders, post all readings and pics here ASAP! Don't lose momentum SmileWavy

BB500 05-08-2009 01:35 PM

Ok, I just bought oil, filter, plugs, and compression tool (NAPA) what are the compression readings supposed to be? 32valve.

SolReaver 05-08-2009 01:59 PM

caution
 
Just turn the engine over by hand a few times and every second time check the blasted marks are lining up. IF there is no binding and everything seems OK (crossing fingers) tap the starter and then hand crank a bit to make sure everything is Kosher. Just take compression readings. looking for discrepancies in compression at this point. BTW check the oil and coolant. (duh)

Imo000 05-08-2009 03:01 PM

Quote:

Originally Posted by BB500 (Post 4653070)
OK! I'm an idiot. The engine DOES spin! I just wasn't turning hard enough (i'm used to motorcycle engines.....)


LMAO..... I'm glad it wasn't anything serious! :)

928Guy 07-14-2009 08:05 PM

Quote:

Originally Posted by BB500 (Post 4653171)
Ok, I just bought oil, filter, plugs, and compression tool (NAPA) what are the compression readings supposed to be? 32valve.

What did the compression check turn up?

MPDano 07-14-2009 08:23 PM

Doesn't matter now, he sold the car last weekend.

SolReaver 07-14-2009 09:18 PM

BB out of the game?
 
Whaaaattt?:eek:

Danglerb 07-14-2009 09:43 PM

One of the guys up here in OC picked it up last Saturday. BB wants to focus on taking apart a nice 79 he bought.

928Guy 07-15-2009 01:35 AM

It does matter.

I'm the guy that bought it.

I've got oil in the coolant. Wondering if he has numbers on the compression check so I can hopefully eliminate a head gasket or cracked block. I'm praying for a ruptured oil cooler....

It smells like motor oil and not tranny fluid. I closed the hood and walked away tonight. I'll dig in tomorrow...

MPDano 07-15-2009 03:49 AM

Quote:

Originally Posted by 928Guy (Post 4777752)
It does matter.

I'm the guy that bought it.

I've got oil in the coolant. Wondering if he has numbers on the compression check so I can hopefully eliminate a head gasket or cracked block. I'm praying for a ruptured oil cooler....

It smells like motor oil and not tranny fluid. I closed the hood and walked away tonight. I'll dig in tomorrow...

Ok???? Your post sounded like any of the rest of us trying to help Blythe on this one. If you read all the posts back, we tried to get him to do readings with not much luck. Your best bet is Buy, Borrow or Steal a Compression Tester and test them yourself. Probably also best to start your own thread and post readings and issue stated in your post.

I also saw the S4 when he first bought it, and if it weren't for hard economic times, your S4 would have been in my driveway ;) Pressure test the Radiator Coolers and Radiator and report back.

928Guy 07-15-2009 07:41 AM

I'll have a compression tester tonight or tomorrow. When I get the results, I will post them.

I'll start a new thread. I got some great advice about testing the radiator, that I will post there.

Thanks!


All times are GMT -8. The time now is 09:42 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.