Mayonnaise at the end of the season |
Post Reply | Page <12 |
Author | |||
gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
Post Options
Thanks(0)
|
||
I'd agree McD. I blew a head gasket on my last boat after I supercharged it. The cylinder was positively shiny in comparison to the rest. Kristofs is not nearly as bad so I'd be leaning more toward the exhaust seal, especially being the back, lowest cylinder. Kristof, just make sure you R & R the riser gaskets on both sides ... probably don't want to do this again very soon |
|||
JCCI
1995 Ski Nautique GT40 |
|||
gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
Post Options
Thanks(0)
|
||
I'm thinking this was a suggestion to inspect these if there didn't seem to be an obvious culprit when tearing down the top end. Based on your pics above and observations of others I'd say you're good without tearing into the pump. |
|||
JCCI
1995 Ski Nautique GT40 |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
Thanks for all the pointers.
All the parts will get thoroughly cleaned and all gaskets will be replaced.
So should I really pull this one too? Damn, just ordered gaskets at Skidim and these are not in my order... |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3600 |
Post Options
Thanks(0)
|
||
Your back cylinder in the photo above had water in that cylinder. See how the piston head is cleaner that the others. Water in there while it is combusting will steam clean the piston head. Either exhaust manifold for that cylinder or head gasket is letting water into the cylinder.
|
|||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21123 |
Post Options
Thanks(0)
|
||
Upon closer inspection, exhaust manifold(s) look highly suspect. That’s where id put my money.
|
|||
Mountain Man
Senior Member Joined: May-09-2014 Location: Brevard, NC Status: Offline Points: 124 |
Post Options
Thanks(0)
|
||
Timing cover is the inspection point. Gaskets interface w/ oil galleries in the blocks.
Steve |
|||
Mountain Man
Senior Member Joined: May-09-2014 Location: Brevard, NC Status: Offline Points: 124 |
Post Options
Thanks(0)
|
||
Pull the circulating water pump and inspect. Another possibility.
Good Luck, Steve |
|||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21123 |
Post Options
Thanks(0)
|
||
So where did the water come from?
|
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
Update with pics...
So, Joe (gt40KS) was so very kind to provide me with some gorgeous looking GT40P heads, for which my gratitude will always come short! And also thanks to Joe (joeinNY) and Tim (TRBenj) for the info they provided me. Armed with all this and the help of my mechanic buddy (and some beer off course), we started the tear down of the engine... And yes, we said "never mind the compression test and all that, let's just tear her down and go from there. So we found a mix of water and oil under the valve covers as expected but almost nothing on the right side compared to the left side. Cylinders are all in perfect shape albeit for some minor build up on the piston heads (no water). Exhaust and riser gaskets where also in good shape... I'll let the pictures speak from here: |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
gt40KS
Gold Member Joined: August-05-2017 Location: Wichita Kansas Status: Offline Points: 943 |
Post Options
Thanks(0)
|
||
Hi Kristof - just saw your post, been busy myself and decent boating weather has long since left us here in Kansas. Certainly not what anyone wants to see, even at the end of a season. But to the question at hand, yes I do happen to have a set of GT-40P remans setting around. Bought them for my boat last year and ended up getting a whole new long block instead so if you're still interested, PM me. A plus is I'm only a few miles from McConnell Air Force base so transfer would be quick & painless. |
|||
JCCI
1995 Ski Nautique GT40 |
|||
MrMcD
Grand Poobah Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3600 |
Post Options
Thanks(0)
|
||
Tim warned you not to let it sit with water in the cylinders. Tim is spot on.
Your cylinders may be perfect today. If you let them sit with moisture in there all winter you will need to bore and hone that block and get oversized pistons. Your cost will go up by a multiple of 5. If you really have to leave it for several months pull all the plugs squirt a lot of Oil in there and rotate the engine a few times by hand. Then re install your plugs to keep moisture out till you have time to fix it properly. The same is true for your crankshaft and camshaft/Lifters. If you have bad oil full of water in there get it out and run it briefly on new oil to move the new oil into all the important spots inside. You will save money and time fixing this. I would fire it at home with no water in the system with the new oil and run it for less than one minute. You can take off the belt from your Raw Water Pump to avoid damage. Running for less than one minute at idle will not overheat it but will get new oil fed all into the system. Then relax till you have time for a proper diagnosis and fix. |
|||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21123 |
Post Options
Thanks(0)
|
||
Crack in the water jacket of the intake (or gasket failure that extends towards the valley) will allow water to enter the valley and mix with oil.
Crack in an exhaust manifold or riser gasket failure will allow water to enter the exhaust (gas) area of the manifold and gravity drain into a cylinder (or several cylinders), then drain past the rings and enter the crank case. Like Joe said, a failed Comp test will identify a leak path in the upper cylinder or combustion chamber area (cracked block or head, head gasket). Lack of water in any cylinder likely exonerates the exhaust. I would have perhaps expected a steam cleaned plug if the leak was coming in the cylinder/piston area. Can’t think of why it would “run on 7” if there is no evidence of water in a cyl... let’s see what that compression test tells you. |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
Now I am a little confused...
How can water mix with the engine oil at an exhaust manifold or at an intake manifold? Or is my understanding of an engine completely out of wack? And all my spark plugs were nice coffee cream (or latte for the hipsters) coloured and dry for the record, we checked them all (twice even). Oh and also, if it is the exhaust manifold, why does the enigne sound and feel like it's running on 7 cilinders intead of 8? Didn't overheat the engine (I am one of those people that keep an eagle eye on temp gauges, in all vehicles running on a motor)... Just want to learn and get as much info as I can you know... Thanks for all the help guys. |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
Post Options
Thanks(0)
|
||
A couple of years ago Tim helped me diagnose one of mine. Turned out to be an exhaust manifold. I had run it first and had found a sparkplug that hed been "steamcleaned" so I had an idea of what side to look at. A very small leak between the riser and manifold leaving a track in the manifold was the confirmation. Did not take much water to make a mess.
Good luck and post up some pictures of what your flying |
|||
JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5693 |
Post Options
Thanks(0)
|
||
I am not Tim but agree that head gaskets are far from likely, assuming you haven't recently overheated the crap out of it. Your plan to test compression is a great place to start. Once that passes then it is likely exhaust manifold/gaskets, possibly intake crack, maybe a block crack but not likely if it has good compression. |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
I know... We won't pull the engine for just that.
I sure hope I don't have a cracked block... You really think it could be cracked? Tim, what do think this would be in your expert (I regard you as one of the experts on this forum) opinion, just out of the top of your head? Anyway, we'll do some serious testing first (leak test, compression test to start with) |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21123 |
Post Options
Thanks(0)
|
||
I would be quite surprised if it’s a head gasket failure... though it is possible. You’ll want to do a bit of testing before tearing down, else you may be scratching your head once it’s disassembled.
Head swaps do not require pulling engine... and you don’t want to bolt them down to a cracked block! |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
We'll go step by step... But we are pretty much convinced it's a head gasket failure. It isn't my mechanic buddies first rodeo... Nor mine. Anyway, gaskets will be ordered for: intake manifold, valve covers and exhaust manifolds. I have the head gaskets already. |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
I'll keep that in mind Maybe we will pull the engine and maybe not... Depends on what we gonna do... Revise it less or more. Time will tell. (Would love to put some GT-40P's on there...) But, it is evident we will do a compression test and a leak test before going crazy... And cilinders were water free and sprayed abundantly with mistery oil before winter storage. |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
Post Options
Thanks(0)
|
||
Intake manifold gasket failure?
|
|||
“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
|||
TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21123 |
Post Options
Thanks(0)
|
||
I would want to check for water in the cylinders ASAP and do a Comp test before any disassembly. The only source of water that should require you to pull the engine is a cracked block. Good luck with the fix!
Oh, and don’t dip your fries in it! |
|||
Kristof
Grand Poobah Joined: October-08-2007 Location: Bree, Belgium Status: Offline Points: 3391 |
Post Options
Thanks(0)
|
||
Hi y'all,
It's been a while since I've posted here. Been around reading though, no worries... But the awesome weather and my second hobby (RC flying) have kept me away from forums and such So regarding the topic title... It was (luckily) the end of september and two buddies and I went on the river for some barfoot runs before the training of our waterski club. First run went as the always go. Issueless. Second run not so much. I cut the throttle after my barefooter let go and as I want to throttle back up to get him, the boat is shaking all over the place... Idled back to our dock and from there a friend towed me back to the marina. My first thought was: ignition. I knew my spark plugs and cables, distibutor cap, rotor and points needed replacmement. But after having replaced all these, the engnine still wasn't turning right My buddy Jo and I continued troubleshooting and when I pulled the dipstick out... Mayonnaise! "Well Jo, I found the issue I guess", I said to him while showing him the dipstick. "Yup", he replied, "better start shopping for some gaskets haha". So as I was preparing for my NATO mission in Lithuania, we winterized the boat and put her to sleep. We plan a little meeting among boat friends after the winter and we will pull the engine out... Nothing a few tech savvy buddies, some wrenches and some beers can't fix... We will have her back on the water next spring Anybody have some GT-40P heads laying around they want to get rid of...? I can arrange for the US Air Force to ship them to my base here in Belgium |
|||
- Gun control means: using BOTH hands!
- Money doesn't make one happy, but when it rains cats and dogs, it's still better to cry in a Porsche than on a bicycle... |
|||
Post Reply | Page <12 |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |