Jimbo

Does anyone have a suggestion of a additive to try? I only drive the car 25 miles each weekend. I'm thinking about adding an additive and taking it on a road trip.

I read a discussion on the oil check valve sticking and causing problems at start up, but it sounds fine at start up.

I narrowed down the noise with a stethoscope to the region of the lifters on the two center cylinders on each bank.

The engine has 141,500 miles on it and it still runs strong.

Thanks.

Normy

Change your oil. Substitute one quart of Marvel Mystery Oil for a quart of regular oil.

Good luck-

N!
'85 S2 5 Speed

Jeff F

Hi:

Toss in a can of Rislone, and it should clear up. Mine has done this when warm, especially if it is during one of the periods where it is getting little use. Do a search, and you will find your problem is quite common.

I don't know what others suggest, but I have heard Rislone solves the problem on this forum, and it works for me. I think I have had to do it three times in the 3 years and 50k I have put on the car.

Good Luck,

Jeff
'87 5-spd.
chips, Ott, RMB

Jimbo

Thanks for the quick replys.

I did a search, but I didn't locate a recommendation on which additives to try.

DoubleNutz

Hehehehehe now that's funny. Sorry Normy dude I can appreciate your advice most of the time but....Marvel Mystery Oil????

Uhhhhhhm not in my Porsche! I would simply raise the oil weight to in a Porsche spec oil to close a few tolerances.

Drewster67

MMO is suppose to be the bomb?. AS far as oil additives go.

http://www.pipercubforum.com/marvel.htm

http://www.yellowairplane.com/EAA_350/mystery_oil.html

MARVEL MYSTERY OIL is compounded to prevent the development of harmful conditions found in the upper area of every internal combustion engine, such as worn intake valve stems gummed piston rings, sticking of exhaust valves and rapid wear on pistons and cylinder walls. MARVEL MYSTERY OIL will also reduce these conditions and/or their effects when already present in an engine.

MARVEL MYSTERY OIL is not just an oil but contains costly ingredients that act to produce a smooth slow idle without engine stalling - faster engine pick-up, especially in high gear - lower oil consumption - easy starting - and a power pull that is even.

http://members.lycos.co.uk/vwjudsonr...ler%20Page.htm

DoubleNutz

I am certain Porsche makes or reccomend something that is its equivalent (like a little Techron on the fuel on occasion). Sorry I am not putting anything into my Porsche that has the word MYSTERY on it...that is about the time that MYSTERY PROBLEMS start to present them selves and your next post on the list reads something like - "OK, I fixed the tapping problem now I have these mysterious leaks from places it never occured before. Does anybody here know what my problem is?"

V-Fib

Say what you will about Marvel Mystery Oil, but I've used it occasionally since the late 60's, and I still use it occasionally now in the 79. Do what ever you feel comfortable with. There are naysayers about Mobil 1 too, and I use it in both the 79 and the C4. There are people out there that say Mothers Milk is carcinogenic , but that is way off topic.



Anthony Tate
79/928 Silver Metallic

Jeff F

Jimbo:

Do a search on 928 forum with keyword "Rislone" only. Should help. I have also heard that Marvel Mystery Oil is decent stuff with a goofy name.

The issue seems to hinge on how to treat with Rislone. I use Mobil 1 15-50 (as do many others), and the clicking seems to return soon after my fresh oil change once Rislone is gone. As a result, I run continually with about a third quart of Rislone in it, and have no problems, unless it sits.

I don't know what kind of wear or damage may result from continually clicking lifters/tappets. I know on Detroit V8's, you can wear a clicking lifter relatively quickly. As a result, I am willing to run continually with a small amount of Rislone in motor. Don't think it hurts.

Maybe someone can insight whether clicking lifters/tappets are causing extra wear on 928's, or is just irritating. Input from our three main suppliers?

Again, I drive it a bunch, almost 20k a year, and lots of road trips. This has been working for about 50k.

Good Luck,

Jeff
'87 5-spd. Chips, Ott, RMB
No one wants my 914 project for free. Rats.

DoubleNutz

Difference is Porsche recommends Mobil1 and uses it at the dealership... and correct me I am wrong but they don't use Marvel Mystery Oil there or, do they? Man, wouldn't it be a hoot if you sent your car to Devek or someplace and before they delivered your 928 back to you they noticed a tick on the lifters and Mark poured a can of MMO in to cover up that ticking noise before delivering it back to you. I bet you would appreciate that.

Sure its your 928, so do what you want but, boiled down- If there is a problem you should fix it...of course you can hide it with MMO ...for a while but when its broke...tell me the story again about 928's being expensive to maintain...how does that go? Or worse yet, tell me that story again about a PO who had a problem and covered it up with MMO- now, you brought it and you're fixing the problem he covered up for 6 years.


quote:
--------------------------------------------------------------------------------
Originally posted by Anthony Tate
There are people out there that say Mothers Milk is carcinogenic ...

Maybe we can cure her problem with some MMO with a mystery vitamin additive. Go ahead pour it in her... lets see if it fixes Junior's "tuma"!

Donald

OT
Originally posted by Anthony Tate
"There are people out there that say Mothers Milk is carcinogenic ... "

But Anthony, it is a known medical fact that 99% of cancer patients have at some point been in direct or indirect contact with Mother's milk! And secondary MM (reportedly even more devastating) has caused (among other reactions) foaming at the mouth, fibrillating halitosis, and loss of consciousness.

Tony

My $9.28 worth.


Take it for a longer and faster weekend drive and perhaps change the oil.

Hows the oil pressure?

Normy

Double-

MMO is simply a light machine oil. I've used it for years to preserve model airplane motors, and also in the '66 Ford F100 that I also own- to cover up exactly what is being discussed here- clicking noises from sticking hydraulic lifters. Works good/lasts a long time. And the old truck is still on the road-

You are right in one point: A better solution would be to repair the problem to begin with.

Best of luck-

N!

Jimbo

Tony
I use 15-50 Mobil One and pressure is 5 at highway speed and 3 at idle speed.

Jeff F
Thanks for the Rislone tips.
---------------------------------------------------------------------------------------------

My heavy mechanic recommends MMO and my P-Wrench recommends
Rislone.

GoRideSno

I have read that MMO should be used in the fuel as a top cylinder lubricant. I think the ratio is 4zo per 10gal of fuel. It smells like snuff.
I think it was the Beatles that said "The Marvel Mystery Oil is dying to take carbon away.... dying to take it away, take it today." But what did they know about Porsches being that they are british?
AK