Sources of engine knock - help me rule out the really bad news - Pirate4x4.Com : 4x4 and Off-Road Forum

yurtle · 08-28-2001, 05:59 PM

Guys, I am working on a low budget build up. Got an 88.5 stocker in pretty good shape, a thorley header, wrangler springs and a pile of steel tubing. Also have an engine knock. The little booger runs great after a full tuneup, valve adjust, and general maintenance. Idles good, drives well, doesn't overheat, etc.. Just has a death rattle kinda knock. At first I thought it was a heat shield but no such luck.

Wondering if there are items to check before tearing into the lubricated parts. I had really hoped to make the motor last until the suspension was done, band-aid fixes are OK at this point considering that a full rebuild or swap is in sight. About 98K on the stock motor, from teh looks of things it was neglected prior to my scooping it up for not much.

Thanks for any help you can provide.

Brian

mudmagnet · 08-28-2001, 06:11 PM

its hard to know with out hearing it but my guess is the it is the valve tapers
well thats i'll i can think of
l8r: <IMG SRC="smilies/roxy.gif" border="0">

J-Dogg · 08-28-2001, 06:47 PM

Mine's had a knock for about 15k miles now, 5 years of on and off driving.

RokHeep · 08-28-2001, 07:34 PM

Most likely just piston slap. Very common in sami's. Don't worry about it for now. <IMG SRC="smilies/beer.gif" border="0">

Tusker · 08-28-2001, 08:46 PM

These Samurai motors are like the old F-head jeep motors. They tend to develop a terrible piston slap after 100k miles or so. If that is what it is, it can make your engine sound like a diesel when it is cold, and gets much quieter or goes away completely when it warms up. My old engine did it for five years. I finally got tired of the noise, no power, and spending wads of cash on oil, so I pulled it out. As long as you don't over rev them, these little 1.3's seem to go on forever and eventually wease themselves to death.

fatkid · 08-28-2001, 10:17 PM

Knock, Knock, who's there? New motor <IMG SRC="smilies/thefinger.gif" border="0">

CragRat · 10-07-2001, 12:49 PM

They all knock

bobaki · 10-07-2001, 03:59 PM

I have only seen one that didn't have piston slap.

ammelk · 10-08-2001, 09:40 AM

God my 93 w/ 88k slaps like a dirty old..well you get the point....I am getting sick of the burning oil up at highway speeds..as Phatty said,
Knock Knock.. <IMG SRC="smilies/thefinger.gif" border="0">.. <IMG SRC="smilies/biggrin.gif" border="0">

08-28-2001, 05:59 PM	#1 (permalink)
yurtle Registered User Join Date: Apr 2001 Member # 4288 Location: Manteca, CA Posts: 302	Sources of engine knock - help me rule out the really bad news Guys, I am working on a low budget build up. Got an 88.5 stocker in pretty good shape, a thorley header, wrangler springs and a pile of steel tubing. Also have an engine knock. The little booger runs great after a full tuneup, valve adjust, and general maintenance. Idles good, drives well, doesn't overheat, etc.. Just has a death rattle kinda knock. At first I thought it was a heat shield but no such luck. Wondering if there are items to check before tearing into the lubricated parts. I had really hoped to make the motor last until the suspension was done, band-aid fixes are OK at this point considering that a full rebuild or swap is in sight. About 98K on the stock motor, from teh looks of things it was neglected prior to my scooping it up for not much. Thanks for any help you can provide. Brian

08-28-2001, 06:11 PM	#2 (permalink)
mudmagnet Registered User Join Date: Aug 2001 Member # 6630 Location: nova scotia, canada Posts: 124	its hard to know with out hearing it but my guess is the it is the valve tapers well thats i'll i can think of l8r: <IMG SRC="smilies/roxy.gif" border="0"> __________________ 88' samurai, 33" cat tracs, chevy rear leafs, sami rears up front, SPOA, and custom z-link steering. 88' samurai, 31" trail masters, 15x8" rims, 2" lift "if you don't get stuck your not having fun..."

08-28-2001, 07:34 PM	#4 (permalink)
RokHeep Registered User Join Date: Jun 2000 Member # 1015 Location: Roseville Ca Posts: 842	Most likely just piston slap. Very common in sami's. Don't worry about it for now. <IMG SRC="smilies/beer.gif" border="0"> __________________ Project Wolverine... Gulo Gulo

08-28-2001, 08:46 PM	#5 (permalink)
Tusker Registered User Join Date: Jan 2001 Member # 2752 Location: Fairfield, CA Posts: 2,043	These Samurai motors are like the old F-head jeep motors. They tend to develop a terrible piston slap after 100k miles or so. If that is what it is, it can make your engine sound like a diesel when it is cold, and gets much quieter or goes away completely when it warms up. My old engine did it for five years. I finally got tired of the noise, no power, and spending wads of cash on oil, so I pulled it out. As long as you don't over rev them, these little 1.3's seem to go on forever and eventually wease themselves to death. __________________ 86 Samurai w/gun rack, 92" WB, VW 1.9 TD, Toyota 5-speed and dual cases with 4.7 gearset, Toyota axles with Longfields, 5.29's, ARB's f&r, YJ's, 35's, FJ-60 power steering, high steer, ............. <>< <>< <>< Hey, if this rig is for wheelin', what are all these animal parts doin' in here?

08-28-2001, 10:17 PM	#6 (permalink)
fatkid Registered User Join Date: May 2001 Member # 4862 Location: Apple Valley, Ca Posts: 5,101	Knock, Knock, who's there? New motor <IMG SRC="smilies/thefinger.gif" border="0"> __________________ [url]http://www.myspace.com/jerrywsparks[/url]

08-28-2001, 06:47 PM	#3 (permalink)
J-Dogg Registered User Join Date: Dec 2000 Member # 2471 Location: Citrus Heights, CA Posts: 1,771	Mine's had a knock for about 15k miles now, 5 years of on and off driving.

10-07-2001, 12:49 PM	#7 (permalink)
CragRat *Glitterbomber* Join Date: Aug 2001 Member # 6483 Location: Simi Valley, Ca. Posts: 889	They all knock __________________ ---------------------------------------------------------------------- " Put on your seatbelt .... I want to try something " AxleSnapper Bulletin Board AxleSnapper Website

10-07-2001, 03:59 PM	#8 (permalink)
bobaki Registered User Join Date: Apr 2001 Member # 4279 Location: Homestead Valley / Mill Valley,CA Posts: 1,154	I have only seen one that didn't have piston slap.

10-08-2001, 09:40 AM	#9 (permalink)
ammelk Registered User Join Date: Jul 2001 Member # 5631 Location: NOW Comming at ya from n????????, Wa Posts: 393	God my 93 w/ 88k slaps like a dirty old..well you get the point....I am getting sick of the burning oil up at highway speeds..as Phatty said, Knock Knock.. <IMG SRC="smilies/thefinger.gif" border="0">.. <IMG SRC="smilies/biggrin.gif" border="0"> __________________ ...:scoresnorebitdsccacarsfiablahblahblahgasiscool:....

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