Treay81
MR2 Scholar
- Total Posts : 151
- Scores: 18
- Reward points: 4764
- Joined: 2011/04/07 19:51:15
- Location: Tanami Desert Northern Territory NSW Australia
- Status: offline
Knocking noise in head / Top end of engine
So I have got my car at a workshop in Dubbo, Trying to get to work last week the car heated up very quickly and began making a knocking noise. The car lost power so i pulled it up and shut it down and had the car towed back to Dubbo. the noise sounds distinctly top end according to the mechanic. Does anyone have any experience with top end failures? if so what components were they and were you able to upgrade them to higher quality components as i'd prefer to make the engine better anytime i need to do work on it. Were there any variations in the Head designs from mine? (mine is Gen2)
Car will not be getting done til after Monday when the exhaust can be fixed up. If he has to remove the head I'll get it cleaned up and reco'd and have ARP head studs put in and upgrade the valve springs at the very least.
If anyone can offer any experience and tips that would be great as Im sure this new mechanic I am using this time round has zero experience on MR2's.
Cheers.
1990 Aust Delivery, N/A. I EXIST SIMPLY TO SERVE AS A WARNING FOR OTHERS!!!!
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 2011/04/07 19:51:15
- Location: perth wa Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/09 20:41:22
(permalink)
To over heat quickly and loose power id think either bhg, or running very lean somehow and melting piston and damaging valves....
But its all guess work really...best of luck. Hopefully nothing terminal.
|
Treay81
MR2 Scholar
- Total Posts : 151
- Scores: 18
- Reward points: 4764
- Joined: 2011/04/07 19:51:15
- Location: Tanami Desert Northern Territory NSW Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/09 21:40:07
(permalink)
Hmmm, hole in piston... that would just top my day off haha.
Cheers for your thoughts, I cant wait to find out and get this issue nailed down.
1990 Aust Delivery, N/A. I EXIST SIMPLY TO SERVE AS A WARNING FOR OTHERS!!!!
|
Gatesys SW20
Supporter
- Total Posts : 1106
- Scores: 22
- Reward points: 1110
- Joined: 2012/11/06 19:28:18
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/09 22:02:32
(permalink)
just a thought, your waterpump hasnt carked it or snapped a belt, and caused it to overheat?
but i would say could be a bhg, or could have possibly dropped a valve and that could be knocking? Im sure a quick compression test could give you a better idea whether its a bhg or metled piston,
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 2011/04/07 19:51:15
- Location: perth wa Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/09 23:32:43
(permalink)
If the timing belt snapped the engine would stop, not just loose power.
|
Gatesys SW20
Supporter
- Total Posts : 1106
- Scores: 22
- Reward points: 1110
- Joined: 2012/11/06 19:28:18
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/09 23:42:30
(permalink)
I know that,
However I was talking about the wp drive belt breaking,
Causing the pump to stop and overheating the engine
Not the timing belt
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 2011/04/07 19:51:15
- Location: perth wa Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/10 00:01:37
(permalink)
The water pump is driven by the timing belt.
|
Gatesys SW20
Supporter
- Total Posts : 1106
- Scores: 22
- Reward points: 1110
- Joined: 2012/11/06 19:28:18
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/10 07:53:29
(permalink)
oh,it is isnt it.
sorry ace, my bad on that
|
Reddtarga
MR2 Deity
- Total Posts : 2175
- Scores: 249
- Reward points: 5547
- Joined: 2011/04/07 19:51:15
- Location: Vic Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/10 10:44:57
(permalink)
Treay81
Car will not be getting done til after Monday when the exhaust can be fixed up. If he has to remove the head I'll get it cleaned up and reco'd and have ARP head studs put in and upgrade the valve springs at the very least.
If anyone can offer any experience and tips that would be great as Im sure this new mechanic I am using this time round has zero experience on MR2's.
On a 3SGE NA motor the stock valve springs should be fine, unless you are updating cams. You'll need new head bolts anyway, and the stock items should be fine as well if you torque them up strictly according to the service manual. If the head needs recoing, first get it crack tested before any other work. Then get the gasket surface dressed straight, check valve guides, valves, seals etc. Good luck
|
Treay81
MR2 Scholar
- Total Posts : 151
- Scores: 18
- Reward points: 4764
- Joined: 2011/04/07 19:51:15
- Location: Tanami Desert Northern Territory NSW Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/10 19:23:58
(permalink)
My 2 is running the 3SGTE engine, does this vary the strength of the head studs and valve springs?. (My sig wont change for me for some reason so I appear to still own my neat little NA which never broke down or faulted on me!)
Thanks for the heads up.
1990 Aust Delivery, N/A. I EXIST SIMPLY TO SERVE AS A WARNING FOR OTHERS!!!!
|
just_ace
Moderator
- Total Posts : 2508
- Scores: 89
- Reward points: 4598
- Joined: 2011/04/07 19:51:15
- Location: perth wa Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/10 21:53:56
(permalink)
☄ Helpfulby Treay81 2013/10/11 07:12:48
Always good to upgrade headstuds on a boosted engine. Also fit a mls head gasket.
Springs are fine for stock cams.
|
Reddtarga
MR2 Deity
- Total Posts : 2175
- Scores: 249
- Reward points: 5547
- Joined: 2011/04/07 19:51:15
- Location: Vic Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/11 08:59:09
(permalink)
Treay81
(My sig wont change for me for some reason so I appear to still own my neat little NA which never broke down or faulted on me!)
Thanks for the heads up.
To edit signature: Open user control panel at the very top of the page > signature and comments > always attach signature to posts > save profile.
|
Treay81
MR2 Scholar
- Total Posts : 151
- Scores: 18
- Reward points: 4764
- Joined: 2011/04/07 19:51:15
- Location: Tanami Desert Northern Territory NSW Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/11 13:46:19
(permalink)
Reddtarga
Treay81
(My sig wont change for me for some reason so I appear to still own my neat little NA which never broke down or faulted on me!)
Thanks for the heads up.
To edit signature:
Open user control panel at the very top of the page > signature and comments > always attach signature to posts > save profile.
I have been trying to change it for months now. But it keeps timing out with some error message "Error 404" what ever that means. doesn't matter if I try to change it all at once or just one thing at a time. got me buggered!.
1990 Aust Delivery, N/A. I EXIST SIMPLY TO SERVE AS A WARNING FOR OTHERS!!!!
|
Treay81
MR2 Scholar
- Total Posts : 151
- Scores: 18
- Reward points: 4764
- Joined: 2011/04/07 19:51:15
- Location: Tanami Desert Northern Territory NSW Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/11 13:48:33
(permalink)
Error message is as follows: The server has encountered an error An exception has been thrown on the page you are trying to access. The error has been logged and the site admin will take the necessary action to prevent such error. It is also possible that the server is currently experiencing high loads, so please try again later by clicking on the [link=javascript:history.back(1)]Back[/link] button on your browser. If the problem persists, you can contact the site admin.
Please try the following: - Click the [link=javascript:history.back(1)]Back[/link] button to try another link.
ASPPlayground.NET Forum Software And I have tried it on 4 PC's with the same outcome?...
1990 Aust Delivery, N/A. I EXIST SIMPLY TO SERVE AS A WARNING FOR OTHERS!!!!
|
Reddtarga
MR2 Deity
- Total Posts : 2175
- Scores: 249
- Reward points: 5547
- Joined: 2011/04/07 19:51:15
- Location: Vic Australia
- Status: offline
Re: Knocking noise in head / Top end of engine
2013/10/11 14:02:53
(permalink)
I just checked a moment ago, and I can edit my signature exactly the way I described with no probs.
Maybe post a message to the admin/moderators.
|